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TF300 Wont boot past ASUS Screen

When I hold the power button plus Volume down key I am only getting two options. One is to wipe data and the other is to enter USB Fastboot mode. I just upgraded to the latest TWRP recovery and when I click the Wipe icon the TWRP splash screen shows up for a second. What I am hoping is that someone has some insight as to why the recovery icon has disappeared and how to get it back. Usually I am not the person asking the questions generally I am the one answering. If anyone has a clue it would definitively help. I did search and found a couple threads where something similar happened but there was no direct answer as how to fix it. Please help.

stedrocklp said:
When I hold the power button plus Volume down key I am only getting two options. One is to wipe data and the other is to enter USB Fastboot mode. I just upgraded to the latest TWRP recovery and when I click the Wipe icon the TWRP splash screen shows up for a second. What I am hoping is that someone has some insight as to why the recovery icon has disappeared and how to get it back. Usually I am not the person asking the questions generally I am the one answering. If anyone has a clue it would definitively help. I did search and found a couple threads where something similar happened but there was no direct answer as how to fix it. Please help.
Click to expand...
Click to collapse
I had a similar issue when I restored a TWRP backup I made with pre version 2.2.1. I was able to get help from the Dees_Troy on IRC.
Notes from IRC conversation
Whatever you restored from your pre TWRP 2.2.1 old backup is not a kernel. The dev that made the original device configuration files for the 300 couldn't find boot . So he just threw boot onto the wrong partition you need to install a working kernel via fastboot.
Steps that got me backup and running.
1. Flashed latest TWRP via fastboot. 'fastboot -i 0x0B05 flash recovery twrp.blob' rebooted
2. Downloaded a cm9 rom and opened the zip file and extract boot.blob . Flashed with 'fastboot -i 0x0B05 flash boot boot.blob' then rebooted.
Now TWRP recovery worked and I was able to install a new custom rom.
Backups made with version 2.2.1 or grater work correctly for me now.

Thank you Thank you Thank you!
brbjr said:
I had a similar issue when I restored a TWRP backup I made with pre version 2.2.1. I was able to get help from the Dees_Troy on IRC.
Notes from IRC conversation
Whatever you restored from your pre TWRP 2.2.1 old backup is not a kernel. The dev that made the original device configuration files for the 300 couldn't find boot . So he just threw boot onto the wrong partition you need to install a working kernel via fastboot.
Steps that got me backup and running.
1. Flashed latest TWRP via fastboot. 'fastboot -i 0x0B05 flash recovery twrp.blob' rebooted
2. Downloaded a cm9 rom and opened the zip file and extract boot.blob . Flashed with 'fastboot -i 0x0B05 flash boot boot.blob' then rebooted.
Now TWRP recovery worked and I was able to install a new custom rom.
Backups made with version 2.2.1 or grater work correctly for me now.
Click to expand...
Click to collapse
That was definitely the problem and I had been trying everything for the past two days. I appreciate you taking the time to reply.

asus tf300 help
brbjr said:
I had a similar issue when I restored a TWRP backup I made with pre version 2.2.1. I was able to get help from the Dees_Troy on IRC.
Notes from IRC conversation
Whatever you restored from your pre TWRP 2.2.1 old backup is not a kernel. The dev that made the original device configuration files for the 300 couldn't find boot . So he just threw boot onto the wrong partition you need to install a working kernel via fastboot.
Steps that got me backup and running.
1. Flashed latest TWRP via fastboot. 'fastboot -i 0x0B05 flash recovery twrp.blob' rebooted
2. Downloaded a cm9 rom and opened the zip file and extract boot.blob . Flashed with 'fastboot -i 0x0B05 flash boot boot.blob' then rebooted.
Now TWRP recovery worked and I was able to install a new custom rom.
Backups made with version 2.2.1 or grater work correctly for me now.
Click to expand...
Click to collapse
hey Im sry I never posted here b4 but I think this thread is the closest to the problem I have. My tf300 jad 4.1.1 ota update, i decided to change the rom since it seemed to have so many advantages. I installed TWRP correctly and according to the process I made later with debugfs tool I got root. It was all good but then I messed up, I installed Hydroponyc rom without backing up my rom and from then on, all hell broke loose. I can acces Clockworck (I changed TWRP for clock thought it might help......) and fastboot but any rom I install it doesnt go past the first asus logo that says device is unlocked on the upper left of the screen. Is there anyway u could help me please? Forgive my noobness I never posted here b4 I dont know if Im breaking any rule but i dont wanna wind up with a very expensive paper weight.

Did I brick it?
manegonzalez said:
hey Im sry I never posted here b4 but I think this thread is the closest to the problem I have. My tf300 jad 4.1.1 ota update, i decided to change the rom since it seemed to have so many advantages. I installed TWRP correctly and according to the process I made later with debugfs tool I got root. It was all good but then I messed up, I installed Hydroponyc rom without backing up my rom and from then on, all hell broke loose. I can acces Clockworck (I changed TWRP for clock thought it might help......) and fastboot but any rom I install it doesnt go past the first asus logo that says device is unlocked on the upper left of the screen. Is there anyway u could help me please? Forgive my noobness I never posted here b4 I dont know if Im breaking any rule but i dont wanna wind up with a very expensive paper weight.
Click to expand...
Click to collapse
I kinda have the same problem! Tried the boot.blob thing but, sadly, that didn't work for me ;(

solution
mizifih said:
I kinda have the same problem! Tried the boot.blob thing but, sadly, that didn't work for me ;(
Click to expand...
Click to collapse
hey I was super frustrated by this but I took some time out and then I found this post I tried it and it worked perfectly give it a shot
Looks like partition sizes chaged with the Asus update. I couldn't flash CM10 or any other rom as well (signature mismatch). If you installed the official 4.1.1 update, you need to manually install it again. Older versions and rollbacks wont work unless you push to some trickery mmcblk0p4, but that's another thread in itself
Download the JB update from Asus's website (if you still have it, that's fine) and extract the blob file. Put the blob file in teh same directory as your fastboot. Boot your TF300 into bootloader and enter:
fastboot -i 0x0B05 flash system blob
It will take a while to install, so be patient. Hope this helps

manegonzalez said:
hey I was super frustrated by this but I took some time out and then I found this post I tried it and it worked perfectly give it a shot
Looks like partition sizes chaged with the Asus update. I couldn't flash CM10 or any other rom as well (signature mismatch). If you installed the official 4.1.1 update, you need to manually install it again. Older versions and rollbacks wont work unless you push to some trickery mmcblk0p4, but that's another thread in itself
Download the JB update from Asus's website (if you still have it, that's fine) and extract the blob file. Put the blob file in teh same directory as your fastboot. Boot your TF300 into bootloader and enter:
fastboot -i 0x0B05 flash system blob
It will take a while to install, so be patient. Hope this helps
Click to expand...
Click to collapse
Doing it now. I'll update as soon as I finish it. Thank you very much for your reply.
UPDATE 1: I can see the shiny-silver ASUS and the progress circles, waiting to see what happen!
UPDATE 2: Setting up Jellybean now (Welcome setup)!
UPDATE 3: Looks like it's working!
Dude, thank you so much! I'll fool around with it. Is there a root method working already? I was wondering if there's a way to restore my backups, at least the ones I made for my gaming progress.

manegonzalez said:
hey Im sry I never posted here b4 but I think this thread is the closest to the problem I have. My tf300 jad 4.1.1 ota update, i decided to change the rom since it seemed to have so many advantages. I installed TWRP correctly and according to the process I made later with debugfs tool I got root. It was all good but then I messed up, I installed Hydroponyc rom without backing up my rom and from then on, all hell broke loose. I can acces Clockworck (I changed TWRP for clock thought it might help......) and fastboot but any rom I install it doesnt go past the first asus logo that says device is unlocked on the upper left of the screen. Is there anyway u could help me please? Forgive my noobness I never posted here b4 I dont know if Im breaking any rule but i dont wanna wind up with a very expensive paper weight.
Click to expand...
Click to collapse
you can flash the file named "blob" extracted from stock JB zip file(download from ASUS website,now there is only US SKU,10.4.2.29),it's about 7XX MB,then use the command "fastboot -i 0x0B05 flash system blob" (put the blob in the same directory with fashboot),It will restore your JB OS.till now,other rom can not work by this way.

jijitax4 said:
you can flash the file named "blob" extracted from stock JB zip file(download from ASUS website,now there is only US SKU,10.4.2.29),it's about 7XX MB,then use the command "fastboot -i 0x0B05 flash system blob" (put the blob in the same directory with fashboot),It will restore your JB OS.till now,other rom can not work by this way.
Click to expand...
Click to collapse
What if you can only boot to APX mode? I only have the option of using that because my unlocked bootloader got erased in the process of updating to JB. Is there a way to install a bootloader using fastboot? Or will it only work with an existing bootloader?
In other words, when I issue the fastboot command
fastboot -i 0x0B05 flash system blob
I get "waiting on device" and nothing happens after that.

Thank you, this worked !!!!!!

[Q] Unable to flash recovery.img after enabling nvflash.on a TF300T

I configured nvflash on a new unrooted, unlocked TF300T, running the 9.4.3.30 firmware by following the directions at. androidroot mobi t3_nvflash. The AndroidRoot9.4.0.30r01 bootloader and nvflash were installed and the tablet was successfully booted into APX mode, nvflash was bootstrapped using wheelie, and the bricksafe.img, factory-config.img and unlock-token.img files were generated and saved.
Unfortunately, I was not able to use fastboot to install clockworkmod recovery or enable root. Flashing was attempted initially using Windows XP and again later using Ubuntu 12.04, with the following result:
# fastboot -i 0x0B05 flash recovery recovery.img
sending 'recovery' (5306 KB)...
OKAY [ 2.443s]
writing 'recovery'...
OKAY [ 2.058s]
finished. total time: 4.500s
# fastboot -i 0x0B05 reboot
rebooting...
All seems well, but recovery does not install, the tablet does not reboot, and will not accept further flashboot commands. It has to be restarted by holding down the start button. On restart a blue line quickly flashes across the screen, but on boot to fastboot/recovery mode there is no icon to access recovery.
Device: TF300T Transformer Pad
Android Version 4.0.3;
Build Number: IML74.US_epad-9.4.3.30-201220604
Questions:
To what partition/folder is the recovery image flashed on the TF300T?
Has anyone ever actually used nvflash to unbrick a TF300T? If so will someone point me to instruction how to repair/restore the original/unlocked bootloader using nvflash, or something close?
Is there a procedure to install CWM recovery using nvflash?
Thank you for your help, any assistance is appreciated.

Some Hard Learned Advice
I'm still unable to flash a custom recovery, but the good news is that my tablet works although it's not rooted, and I have a functioning nvflash
If you want to avoid my problem, I recommend that you root your tablet before you install nvflash. Remember that at present, you can only install nvflash on a TF300T running ICS but, definitely do install nvflash. Follow the instructions from the folks at androidroot.mobi, but don't forget to root first.

listerism said:
I'm still unable to flash a custom recovery, but the good news is that my tablet works although it's not rooted, and I have a functioning nvflash
If you want to avoid my problem, I recommend that you root your tablet before you install nvflash. Remember that at present, you can only install nvflash on a TF300T running ICS but, definitely do install nvflash. Follow the instructions from the folks at androidroot.mobi, but don't forget to root first.
Click to expand...
Click to collapse
I believe you would want to follow the guide in the General section for the TF300 to upgrade from ICS to JB 4.1.1. Its called
[GUIDE]Upgrade your TF300t to Jellybean 4.1, root & remove bloatware[Noobproof]
Then update to the newest version of 4.1.1. Then finally put a version of TWRP that is compatible with the 4.1.1 bootloader on the device. Also when I Installed the recovery I used the "recovery.blob" file, not the .img

listerism said:
I configured nvflash on a new unrooted, unlocked TF300T, running the 9.4.3.30 firmware by following the directions at. androidroot mobi t3_nvflash. The AndroidRoot9.4.0.30r01 bootloader and nvflash were installed and the tablet was successfully booted into APX mode, nvflash was bootstrapped using wheelie, and the bricksafe.img, factory-config.img and unlock-token.img files were generated and saved.
Unfortunately, I was not able to use fastboot to install clockworkmod recovery or enable root. Flashing was attempted initially using Windows XP and again later using Ubuntu 12.04, with the following result:
# fastboot -i 0x0B05 flash recovery recovery.img
sending 'recovery' (5306 KB)...
OKAY [ 2.443s]
writing 'recovery'...
OKAY [ 2.058s]
finished. total time: 4.500s
# fastboot -i 0x0B05 reboot
rebooting...
All seems well, but recovery does not install, the tablet does not reboot, and will not accept further flashboot commands. It has to be restarted by holding down the start button. On restart a blue line quickly flashes across the screen, but on boot to fastboot/recovery mode there is no icon to access recovery.
Device: TF300T Transformer Pad
Android Version 4.0.3;
Build Number: IML74.US_epad-9.4.3.30-201220604
Questions:
To what partition/folder is the recovery image flashed on the TF300T?
Has anyone ever actually used nvflash to unbrick a TF300T? If so will someone point me to instruction how to repair/restore the original/unlocked bootloader using nvflash, or something close?
Is there a procedure to install CWM recovery using nvflash?
Thank you for your help, any assistance is appreciated.
Click to expand...
Click to collapse
Since you already have installed nvflash and have your files I'll try to answer with that in mind.
First I suggest using twrp of the latest version for ICS not cwm.
The partition for recovery is recovery. The commands you provided are correct (I do suggest using a blob file with fastboot - and twrp not cwm).
For unbrick with nvflash yes others have here is a link with the commands needed.
Remember you only have to flash what is needed to recover your tablet.

Did you perhaps download the wrong version of recovery? There is specific versions for ICS and JB 4.1.1 and JB 4.2.1. However I think of you use a blob instead it may work. But as above posters said, I would update to the version of stock android that you want. Cuz when you update your going to loose root and recovery anyways so why bother putting it on there? So I wouldn't flash anything till you are on the version you want to root. Also it will be safer to upgrade with stock recovery. TONS of people have bricked by updating to 4.2.1 with an incompatible recovery. You've been warned.
Sent from my ASUS Transformer Pad TF300T using xda app-developers app

Nevermind. I need to read entire posts...

No USB icon
Hi Guys,
I have 4.2.1 installed and want to move up to 4.2.2 however i now notice that when I try to boot back into recovery I have no USB icon to reinstall TWRP. I used TWRP 2.5 to install 4.2.1. Can someone explain how I can get TWRP back onto the system and get my USB icon back so I can keep up to date.
Your assistance will be gratefully appreciated.
Cheers
Asus TF300T

The 4.2 bootloader doesn't have a separate fastboot mode. As soon as you're in the bootloader, fastboot starts. There's no icon to select because it's already in fastboot mode.

speye007 said:
Hi Guys,
I have 4.2.1 installed and want to move up to 4.2.2 however i now notice that when I try to boot back into recovery I have no USB icon to reinstall TWRP. I used TWRP 2.5 to install 4.2.1. Can someone explain how I can get TWRP back onto the system and get my USB icon back so I can keep up to date.
Your assistance will be gratefully appreciated.
Cheers
Asus TF300T
Click to expand...
Click to collapse
The new 4.2 bootloader has no usb icon. When you enter the bootloader do not press any keys you will automatically enter usb mode. Watch the upper left for a message showing fastboot started..
---------- Post added at 10:34 AM ---------- Previous post was at 10:33 AM ----------
EndlessDissent said:
The 4.2 bootloader doesn't have a separate fastboot mode. As soon as you're in the bootloader, fastboot starts. There's no icon to select because it's already in fastboot mode.
Click to expand...
Click to collapse
You were to quick for me that time.

tobdaryl said:
The new 4.2 bootloader has no usb icon. When you enter the bootloader do not press any keys you will automatically enter usb mode. Watch the upper left for a message showing fastboot started..
---------- Post added at 10:34 AM ---------- Previous post was at 10:33 AM ----------
You were to quick for me that time.
Click to expand...
Click to collapse
Thanks I'll let you know it goes

speye007 said:
Thanks I'll let you know it goes
Click to expand...
Click to collapse
Well thanks that did work however I now have and issue with TWRP wanting a password and I've tried the
http://forum.xda-developers.com/showthread.php?t=2187982
Click to expand...
Click to collapse
fix but I get a dual screen of TWRP and can't do a thing with it is there a way that I can wipe the unit and start again this is getting frustrating and from what I can see no one from TWRP is offereing any suggestions to fix this issue either.....very frustrating as this is my daily
Your assistance would be gratefully appreciated
Cheers

speye007 said:
Well thanks that did work however I now have and issue with TWRP wanting a password and I've tried the fix but I get a dual screen of TWRP and can't do a thing with it is there a way that I can wipe the unit and start again this is getting frustrating and from what I can see no one from TWRP is offereing any suggestions to fix this issue either.....very frustrating as this is my daily
Your assistance would be gratefully appreciated
Cheers
Click to expand...
Click to collapse
The reason no one from TWRP is fixing it is because there's nothing to fix. It wasn't a TWRP bug. It was ASUS's bug, and they fixed it in the most recent OTA update. I would suggest using fastboot to flash back to stock to get your stock recovery back, then update to the most recent OTA, then you can flash TWRP back.
Edit: What I just said was actually kind of in the OP of the thread to which you linked, in bright red letters. It said that you need to be on the very latest OTA for that version of TWRP to work. In fact, those were, more-or-less the very first words in the post.

EndlessDissent said:
The reason no one from TWRP is fixing it is because there's nothing to fix. It wasn't a TWRP bug. It was ASUS's bug, and they fixed it in the most recent OTA update. I would suggest using fastboot to flash back to stock to get your stock recovery back, then update to the most recent OTA, then you can flash TWRP back.
Edit: What I just said was actually kind of in the OP of the thread to which you linked, in bright red letters. It said that you need to be on the very latest OTA for that version of TWRP to work. In fact, those were, more-or-less the very first words in the post.
Click to expand...
Click to collapse
Hi sorry its taken me time to get back. I've had some issues with this I now get a double TWRP screen that I can't do anything with and when I can get back to a normal screen it asks for a password all the time and I've tried to factory reset from inside (not from twrp) and it does nothing at all
So I'd like to try and reset back to factory and start again if thats possible? And is there a good tutorial on this?
Cheers & thank you for your assistance

speye007 said:
Hi sorry its taken me time to get back. I've had some issues with this I now get a double TWRP screen that I can't do anything with and when I can get back to a normal screen it asks for a password all the time and I've tried to factory reset from inside (not from twrp) and it does nothing at all
So I'd like to try and reset back to factory and start again if thats possible? And is there a good tutorial on this?
Cheers & thank you for your assistance
Click to expand...
Click to collapse
If you want to go back to stock, just flash the stock firmware in fastboot. There are lots of guides for flashing stock ROMs throughout the forum.

EndlessDissent said:
If you want to go back to stock, just flash the stock firmware in fastboot. There are lots of guides for flashing stock ROMs throughout the forum.
Click to expand...
Click to collapse
I found the issue you need to go to this version of TWRP (which I may add is not on the download list fromTWRP) http://goo.im/devs/OpenRecovery/tf300t/openrecovery-twrp-2.4.4.0-tf300t-4.2.blob
I now have TWRP working and I'm running 10.6.1.8 however I find that I can not factory reset or use TWRP to upgrade firmware to 10.6.1.15 or any other ROM. The device says "Device is unlocked" & I'm also having an issue trying to locate a good tutorial on how to flash new firmware or kernel with fastboot. If anyone knows of a great tutorial that is easy to follow and also how I can obtain any of the required .img files that would be great.
This is getting frustrating now not being able to flash anything at all (angry)
I'm also getting an error message when I try to use the Asus unlock apk (An unknown error occurs,which maybe a network connection issue. Please wait and try again later) yes done toooo many times.
I've now even tried to flash CWM instead of TWRP and nothing ....the device boots fine and works fine I just can not factory reset, or install a new or updated rom from TWRP.
Message from TWRP :
Updating partition details...
Simulating actions...
Updating partition details...
and TWRP says Successful but nothing happens
can someone help me out here before I rip what little hair I still have out ggggrrrrrrrr

[Q] Brickety Brick

I couldn't leave well enough alone and I f'd up somehow trying to flash my pad to 4.2 stock from Cyanogen with TWRP. Now booting thru vol- and power brings up TWRP only. It asks me for a password, which it never has before. I hit cancel and it puts me into home screen. Only ray of hope I see is that ADB still recognizes it and interacts with it. I've tried pushing every ROM I can get my mitts on to the pad. When I try and install it fails after a few seconds. Then the files I just pushed are no longer on /sdcard. I don't have a clue.
Anyone, anyone? Bueller, Bueller...

dedalus2k said:
I couldn't leave well enough alone and I f'd up somehow trying to flash my pad to 4.2 stock from Cyanogen with TWRP. Now booting thru vol- and power brings up TWRP only. It asks me for a password, which it never has before. I hit cancel and it puts me into home screen. Only ray of hope I see is that ADB still recognizes it and interacts with it. I've tried pushing every ROM I can get my mitts on to the pad. When I try and install it fails after a few seconds. Then the files I just pushed are no longer on /sdcard. I don't have a clue.
Anyone, anyone? Bueller, Bueller...
Click to expand...
Click to collapse
Make sure you have flashed the correct version of TWRP. as there are three different versions on their website. If you are confident you have flashed correct TWRP version then you may need to downgrade to the previous version of TWRP. I had a similar issue I downgraded to 2.4.4.0 JB build. Hope this helps

"...you may need to downgrade to the previous version of TWRP."
I can't get into fastboot to install an earlier version. I think I'm screwed.
Theoretically I could use TWRP to totally wipe the pad and then ADB to push the system files back on, but... I don't have that kind of tech knowledge and I doubt anyone who doesn't work for ASUS does.
Edit: My mistake. You can use ADB to install TWRP. I'll give it a shot, though I'm pretty damn sure it's a long one.

dedalus2k said:
"...you may need to downgrade to the previous version of TWRP."
I can't get into fastboot to install an earlier version. I think I'm screwed.
Theoretically I could use TWRP to totally wipe the pad and then ADB to push the system files back on, but... I don't have that kind of tech knowledge and I doubt anyone who doesn't work for ASUS does.
Edit: My mistake. You can use ADB to install TWRP. I'll give it a shot, though I'm pretty damn sure it's a long one.
Click to expand...
Click to collapse
Hey dude just thought I make it easier to understand if you have 3 icons then you will pre load into fastboot if you have four icons then you will have to load fastboot. Lemme know if you run into problems. Happy to help mate.

anaschillin said:
Hey dude just thought I make it easier to understand if you have 3 icons then you will pre load into fastboot if you have four icons then you will have to load fastboot. Lemme know if you run into problems. Happy to help mate.
Click to expand...
Click to collapse
I don't get three or four icons. It boots directly into TWRP. ADB still recognizes the pad and I can still push files to /sdcard. I tried reflashing the ROM but it fails after just a couple seconds, shuts down and boots back into TWRP.
I'm going to get a flashcard reader today and format my external card FAT32 and see if I can't install a new ROM from that.

im in a different situation
i did a erase system in fastboot
now i can only go to fastboot with preload on it
or
apx
is there any wait i can fix it and bring it back to live

Update: Bought a card reader at local Discount Electronics. Plugged it into my PC and it promptly froze my computer and destroyed my $80 64G sd card. Can't catch a break here. So I need to get another card and reader before I can attempt to install rom from external card.
The card reader is by a company called Zeikos. http://www.amazon.com/electronics/dp/B001T9N0R6 You have been warned.

Sheena0220 said:
im in a different situation
i did a erase system in fastboot
now i can only go to fastboot with preload on it
or
apx
is there any wait i can fix it and bring it back to live
Click to expand...
Click to collapse
Can you flash a recovery...
if you manage to flash a recovery run the command: fastboot reboot recovery.

dedalus2k said:
I don't get three or four icons. It boots directly into TWRP. ADB still recognizes the pad and I can still push files to /sdcard. I tried reflashing the ROM but it fails after just a couple seconds, shuts down and boots back into TWRP.
I'm going to get a flashcard reader today and format my external card FAT32 and see if I can't install a new ROM from that.
Click to expand...
Click to collapse
adb reboot bootloader
or
fastboot -i 0x0B05 reboot-bootloader
or
from android terminal - you must be rooted for this to work
su
reboot bootloader

tobdaryl said:
adb reboot bootloader
or
fastboot -i 0x0B05 reboot-bootloader
or
from android terminal - you must be rooted for this to work
su
reboot bootloader
Click to expand...
Click to collapse
I'll give the first one a shot. I can't get into fastboot mode and the su command comes up an error even though I am rooted or was. I really can't figure out where it all went haywire.

YES! I'm in!
tobdaryl said:
adb reboot bootloader
or
fastboot -i 0x0B05 reboot-bootloader
or
from android terminal - you must be rooted for this to work
su
reboot bootloader
Click to expand...
Click to collapse
You are a god amongst men! Thank you sooooo much. If you don't mind...now what?
I get the following messages:
Key driver not found..Booting OS
Android cardhu-user bootloader <1.00e> released by "WW_epad-10.6.1.15.3-20130416" A03
Starting Fastboot USB download protocol
and then the three icons, RCK android and Wipe Data.
After this mishap I don't trust myself to weed through the mountains of info here again. I'm trying to reinstall 4.2.1 and keep it rooted. I'm assuming reinstall 4.2.1 and then reroot, yes? Would you mind terribly pointing me to a reliable post I can follow.
Thank You so much!!!

dedalus2k said:
You are a god amongst men! Thank you sooooo much. If you don't mind...now what?
I get the following messages:
Key driver not found..Booting OS
Android cardhu-user bootloader <1.00e> released by "WW_epad-10.6.1.15.3-20130416" A03
Starting Fastboot USB download protocol
and then the three icons, RCK android and Wipe Data.
After this mishap I don't trust myself to weed through the mountains of info here again. I'm trying to reinstall 4.2.1 and keep it rooted. I'm assuming reinstall 4.2.1 and then reroot, yes? Would you mind terribly pointing me to a reliable post I can follow.
Thank You so much!!!
Click to expand...
Click to collapse
You will have to reroot but with motochopper that is minor.
Unzip 10.6.1.15.3 till you have a blob file. Place the blob in the directory with fastboot.
Reboot into bootloader and wait for fastboot to start. (watch the upper left of the screen)
fastboot -i 0x0B05 flash system blob - wait for the flash to finish then
fastboot -i 0x0B05 reboot
Good Luck!

tobdaryl said:
You will have to reroot but with motochopper that is minor.
Unzip 10.6.1.15.3 till you have a blob file. Place the blob in the directory with fastboot.
Reboot into bootloader and wait for fastboot to start. (watch the upper left of the screen)
fastboot -i 0x0B05 flash system blob - wait for the flash to finish then
fastboot -i 0x0B05 reboot
Good Luck!
Click to expand...
Click to collapse
Grazie Mille! Gonna give it a go right now.
Should I bother with TWRP? I tried to update it before and that's the point it went to hell last time.

tobdaryl said:
You will have to reroot but with motochopper that is minor.
Unzip 10.6.1.15.3 till you have a blob file. Place the blob in the directory with fastboot.
Reboot into bootloader and wait for fastboot to start. (watch the upper left of the screen)
fastboot -i 0x0B05 flash system blob - wait for the flash to finish then
fastboot -i 0x0B05 reboot
Good Luck!
Click to expand...
Click to collapse
Okay. I did it. No joy.
erasing 'system'...
OKAY [2.544s]
sending 'system' <800927 KB>
OKAY [136.994s]
writing 'system'...
OKAY [3.151s]
finished. total time 142.707s
fire off the reboot command
rebooting...
finished. total time 0.551s
But the tab doesn't reboot. And that short "writing 'system'" time to me sounds mighty suspicious
Any ideas? I'm afraid to force reboot it.

dedalus2k said:
Okay. I did it. No joy.
erasing 'system'...
OKAY [2.544s]
sending 'system' <800927 KB>
OKAY [136.994s]
writing 'system'...
OKAY [3.151s]
finished. total time 142.707s
fire off the reboot command
rebooting...
finished. total time 0.551s
But the tab doesn't reboot. And that short "writing 'system'" time to me sounds mighty suspicious
Any ideas? I'm afraid to force reboot it.
Click to expand...
Click to collapse
Reboot into the bootloader. If you get into the bootloader cold boot - volume down on the first icon.
If your tablet fails to boot into android go back to the bootloader and reboot into recovery.
I'll wait for your response.

tobdaryl said:
Reboot into the bootloader. If you get into the bootloader cold boot - volume down on the first icon.
If your tablet fails to boot into android go back to the bootloader and reboot into recovery.
I'll wait for your response.
Click to expand...
Click to collapse
Done and no luck

dedalus2k said:
Done and no luck
Click to expand...
Click to collapse
No recovery either?
What happens in both cases - please explain.

tobdaryl said:
No recovery either?
What happens in both cases - please explain.
Click to expand...
Click to collapse
From off state it always boots into TWRP. I stupidly installed an older version on accident. 2.2.2
With your help I was able to boot into fastboot with the adb command. I've run installs of both the ROM and tried an update to TWRP. According to the console everything went fine but when I give it the reboot command nothing happens. Somewhere in there it looses connections with the tablet it seems.

dedalus2k said:
From off state it always boots into TWRP. I stupidly installed an older version on accident. 2.2.2
With your help I was able to boot into fastboot with the adb command. I've run installs of both the ROM and tried an update to TWRP. According to the console everything went fine but when I give it the reboot command nothing happens. Somewhere in there it looses connections with the tablet it seems.
Click to expand...
Click to collapse
Please explain what happens now. Can you get into the bootloader, recovery, etc?
If you get into the bootloader what happens when you cold boot?
When you boot now without any intervention does it still boot twrp?

tobdaryl said:
Please explain what happens now. Can you get into the bootloader, recovery, etc?
If you get into the bootloader what happens when you cold boot?
When you boot now without any intervention does it still boot twrp?
Click to expand...
Click to collapse
Excuse my noobishness.
I can get into bootloader with the adb reboot bootloader command you gave me
When I go to recovery, RCK right?, it freezes up.
From cold boot it goes directly into TWRP, which asks for a password which it hasn't ever before this mishap.
If I go to android from bootloader and it goes to TWRP as well

[Q] Locked or Unlocked?, boot loop, bricked.

Ok so I unlocked and rooted the my TF700 but had not yet installed any new roms or recovery on it, I was getting round to that but other things to do etc. So one day the battery ran out and when I powered it up bleary eyed one morning it said it could not boot due to being encrypted. I had not encrypted it. So the only option I had was to wipe the device.
Done so back with a working device for some weeks. Then the other day I powered it off. When I powered it back on boot-loop, gets to the point of Asus inspiring inovation persistent perfection (yeah right).
No problem I thinks I'll just use fastboot to save the day because when I boot it says "Device Unlocked" and I can get to the RCK/ANDROID/WIPE screen. So run fastboot and it says it writes to the device but I don't believe it as the copying of an image takes ~130seconds and the writing 0.094s.
So I think I am in this half-locked limbo and I am assuming there is no way out of this.
I've tried a stock rom on the sd card which gets up the Android with a spinning blue vector in his chest but this goes on for about 5 minutes and reboots again back to boot loop.
How did it get half unlocked and if its half unlocked then surely its not unlocked so how does that affect the warranty, I may just send it back and see what happens? I am annoyed because I had not got around to messing around with custom roms etc... I also thought it wouldnt OTA update I am guessing maybe this is what happened when it complained about the encrypted device.
I really am about to give up and use it for chopping onions, a very expensive chopping board.
Not sure if anyone has any bright ideas but I'm all out...

Slarty Bartfast said:
Ok so I unlocked and rooted the my TF700 but had not yet installed any new roms or recovery on it, I was getting round to that but other things to do etc. So one day the battery ran out and when I powered it up bleary eyed one morning it said it could not boot due to being encrypted. I had not encrypted it. So the only option I had was to wipe the device.
Done so back with a working device for some weeks. Then the other day I powered it off. When I powered it back on boot-loop, gets to the point of Asus inspiring inovation persistent perfection (yeah right).
No problem I thinks I'll just use fastboot to save the day because when I boot it says "Device Unlocked" and I can get to the RCK/ANDROID/WIPE screen. So run fastboot and it says it writes to the device but I don't believe it as the copying of an image takes ~130seconds and the writing 0.094s.
So I think I am in this half-locked limbo and I am assuming there is no way out of this.
I've tried a stock rom on the sd card which gets up the Android with a spinning blue vector in his chest but this goes on for about 5 minutes and reboots again back to boot loop.
How did it get half unlocked and if its half unlocked then surely its not unlocked so how does that affect the warranty, I may just send it back and see what happens? I am annoyed because I had not got around to messing around with custom roms etc... I also thought it wouldnt OTA update I am guessing maybe this is what happened when it complained about the encrypted device.
I really am about to give up and use it for chopping onions, a very expensive chopping board.
Not sure if anyone has any bright ideas but I'm all out...
Click to expand...
Click to collapse
Sorry, from your description I don't quite get what exactly you did. What did you try to write with the fastboot command? To me your problem sounds like a bootloader problem.
I understand you still have fastboot access to your device? If so, I'd suggest to follow the steps described here at "Scenario Two":
1. Load a custom recovery, e.g. TWRP with the fastboot method.
2. Download the recovery + bootloader package as described in the CROMi-X thread.
3. Boot into recovery and flash that package.
If you get to this point you should be able to flash any custom (JB based ROM), recommend the CROMi-X.
Hope this helps!

FordPrefect said:
Sorry, from your description I don't quite get what exactly you did. What did you try to write with the fastboot command? To me your problem sounds like a bootloader problem.
I understand you still have fastboot access to your device? If so, I'd suggest to follow the steps described here at "Scenario Two":
1. Load a custom recovery, e.g. TWRP with the fastboot method.
2. Download the recovery + bootloader package as described in the CROMi-X thread.
3. Boot into recovery and flash that package.
If you get to this point you should be able to flash any custom (JB based ROM), recommend the CROMi-X.
Hope this helps!
Click to expand...
Click to collapse
I tried this, so try writing open recovery.
[email protected]:~/Downloads$ md5sum openrecovery-twrp-2.6.3.1-tf700t.blob
0c55d6d437d96644df5ae16408b15795 openrecovery-twrp-2.6.3.1-tf700t.blob
[email protected]:~/Downloads$ mv openrecovery-twrp-2.6.3.1-tf700t.blob twrp.blob
[email protected]:~/Downloads$ sudo fastboot -i 0x0B05 flash recovery twrp.blob
sending 'recovery' (6106 KB)...
OKAY [ 0.795s]
writing 'recovery'...
OKAY [ 0.083s]
finished. total time: 0.878s
Now the flashing RCK option has stopped flashing, if I try to reboot:
[email protected]:~/Downloads$ sudo fastboot -i 0x0B05 reboot
rebooting...
It just sits here not rebooting. The only way back is to use the pinhole to reboot.
finished. total time: 46.183s
[email protected]:~/Downloads$
Then if I leave it, it boot loops again.
If I hold volume down I get back to the RCK/Android/WipeData fastboot screen. If I try RCK I just get an android lying on its back. If I try from the sd card it spins for ~5 mins then reboots and back to boot loop.
So its almost as if its not writing anything with fastboot.

Slarty Bartfast said:
I tried this, so try writing open recovery.
[email protected]:~/Downloads$ md5sum openrecovery-twrp-2.6.3.1-tf700t.blob
0c55d6d437d96644df5ae16408b15795 openrecovery-twrp-2.6.3.1-tf700t.blob
[email protected]:~/Downloads$ mv openrecovery-twrp-2.6.3.1-tf700t.blob twrp.blob
[email protected]:~/Downloads$ sudo fastboot -i 0x0B05 flash recovery twrp.blob
sending 'recovery' (6106 KB)...
OKAY [ 0.795s]
writing 'recovery'...
OKAY [ 0.083s]
finished. total time: 0.878s
Now the flashing RCK option has stopped flashing, if I try to reboot:
[email protected]:~/Downloads$ sudo fastboot -i 0x0B05 reboot
rebooting...
It just sits here not rebooting. The only way back is to use the pinhole to reboot.
finished. total time: 46.183s
[email protected]:~/Downloads$
Then if I leave it, it boot loops again.
If I hold volume down I get back to the RCK/Android/WipeData fastboot screen. If I try RCK I just get an android lying on its back. If I try from the sd card it spins for ~5 mins then reboots and back to boot loop.
So its almost as if its not writing anything with fastboot.
Click to expand...
Click to collapse
ok, thanks for the clarification. However, that is exactly what I would have done ... you have checked the download file and fastboot seems to transfer it. From then on you should be able to boot into recovery.
Forgive me please for a dumb question ..but have you tried to boot the "classic" way? Like switching the device off and then power on with the Volume minus key pressed? Other than this, I am sorry but I don't have any further suggestion

Slarty Bartfast said:
I tried this, so try writing open recovery.
[email protected]:~/Downloads$ md5sum openrecovery-twrp-2.6.3.1-tf700t.blob
0c55d6d437d96644df5ae16408b15795 openrecovery-twrp-2.6.3.1-tf700t.blob
[email protected]:~/Downloads$ mv openrecovery-twrp-2.6.3.1-tf700t.blob twrp.blob
[email protected]:~/Downloads$ sudo fastboot -i 0x0B05 flash recovery twrp.blob
sending 'recovery' (6106 KB)...
OKAY [ 0.795s]
writing 'recovery'...
OKAY [ 0.083s]
finished. total time: 0.878s
Now the flashing RCK option has stopped flashing, if I try to reboot:
[email protected]:~/Downloads$ sudo fastboot -i 0x0B05 reboot
rebooting...
It just sits here not rebooting. The only way back is to use the pinhole to reboot.
finished. total time: 46.183s
[email protected]:~/Downloads$
Then if I leave it, it boot loops again.
If I hold volume down I get back to the RCK/Android/WipeData fastboot screen. If I try RCK I just get an android lying on its back. If I try from the sd card it spins for ~5 mins then reboots and back to boot loop.
So its almost as if its not writing anything with fastboot.
Click to expand...
Click to collapse
Some things about your fastboot commands are very interesting..
First, what was the operating system that you were using. Second, your recovery name is not the same as you tried to fastboot with the command. Third, I think that you may do something incorrect with fastboot because your bootloader is fine and please be careful with your bootloader. If something is wrong with your bootloader, it is hard to bring it back unless you have your NVflash blobs... Last, you are still with the stock recovery and did not have a custom recovery installed yet.. Also, it seems that you have a bootloop. Any way, I think that you are still good depending on what you want to do with your device...

LetMeKnow said:
Some things about your fastboot commands are very interesting..
First, what was the operating system that you were using. Second, your recovery name is not the same as you tried to fastboot with the command. Third, I think that you may do something incorrect with fastboot because your bootloader is fine and please be careful with your bootloader. If something is wrong with your bootloader, it is hard to bring it back unless you have your NVflash blobs... Last, you are still with the stock recovery and did not have a custom recovery installed yet.. Also, it seems that you have a bootloop. Any way, I think that you are still good depending on what you want to do with your device...
Click to expand...
Click to collapse
Linux, I renamed the recovery as per the instructions at the TWRP teamwin page (cant post links)
It seems that although it says the device is unlocked I cannot write anything to the device and it is stuck in a boot loop, wont flash the stock image from the sd card either. I have been searching for a solution now for a week and can't seem to find anything.

Slarty Bartfast said:
Linux, I renamed the recovery as per the instructions at the TWRP teamwin page (cant post links)
It seems that although it says the device is unlocked I cannot write anything to the device and it is stuck in a boot loop, wont flash the stock image from the sd card either. I have been searching for a solution now for a week and can't seem to find anything.
Click to expand...
Click to collapse
Your finished times are way too fast - mine are 10 times this so I suspect it hasn't written the recovery blob correctly. Did you notice it put a blue time bar on the screen when doing the write?

sbdags said:
Your finished times are way too fast - mine are 10 times this so I suspect it hasn't written the recovery blob correctly. Did you notice it put a blue time bar on the screen when doing the write?
Click to expand...
Click to collapse
Yes I noticed that in comparison to other peoples output that it is too quick.
No there is no blue time bar put on the screen. After you fastboot the recovery the green block that pulses on the selected option RCK for example, stops pulsing and then I have to pinhole reset.
I am thinking that the unlock didn't correctly unlock the device orthe time it would not boot requiring a data wipe because it said the device was encrypted, I guess somehow it got an OTA although it shouldn't have received one. But I cant understand how the unlock could be reverted because the consensus is it cannot.
If the unlock didnt work I may try an RMA on the grounds that its not properly unlocked therefore the T&C for unlocking is not really valid as I would have expected to have an unlocked device.

Slarty Bartfast said:
Yes I noticed that in comparison to other peoples output that it is too quick.
No there is no blue time bar put on the screen. After you fastboot the recovery the green block that pulses on the selected option RCK for example, stops pulsing and then I have to pinhole reset.
I am thinking that the unlock didn't correctly unlock the device orthe time it would not boot requiring a data wipe because it said the device was encrypted, I guess somehow it got an OTA although it shouldn't have received one. But I cant understand how the unlock could be reverted because the consensus is it cannot.
If the unlock didnt work I may try an RMA on the grounds that its not properly unlocked therefore the T&C for unlocking is not really valid as I would have expected to have an unlocked device.
Click to expand...
Click to collapse
I seriously doubt your arguments will get you anywhere with Asus since they don't support unlocking, but I've never heard of a "partial unlock". Either it works or it fails.
I suspect your problem is related to "bleary eyed", the encryption and data wipe you did. Or a driver issue on your PC.
If you cannot install a custom recovery via fastboot, I would try to flash the stock firmware and start at square 1.....
Sent from my ASUS Transformer Pad TF700T using Tapatalk 4

Slarty Bartfast said:
Linux, I renamed the recovery as per the instructions at the TWRP teamwin page (cant post links)
It seems that although it says the device is unlocked I cannot write anything to the device and it is stuck in a boot loop, wont flash the stock image from the sd card either. I have been searching for a solution now for a week and can't seem to find anything.
Click to expand...
Click to collapse
Did you turn on or tick the USB debugging in the developer options? You need to turn it on in order to fastboot... Good luck..:fingers-crossed:

LetMeKnow said:
Did you turn on or tick the USB debugging in the developer options? You need to turn it on in order to fastboot...
Click to expand...
Click to collapse
Are you sure? The bootloader mounts the /data partition to read some Android setting? Does not look plausible to me.

LetMeKnow said:
Did you turn on or tick the USB debugging in the developer options? You need to turn it on in order to fastboot... Good luck..:fingers-crossed:
Click to expand...
Click to collapse
Thats a good question, I would have thought so (always do for everything else) but now you mention it. I can't say for sure. And it won't accept the stock recovery from sd card, 5 minutes of spinning blue thing in chest then reboot into boot loop...
Is it time to start chopping onions?

berndblb said:
I seriously doubt your arguments will get you anywhere with Asus since they don't support unlocking, but I've never heard of a "partial unlock". Either it works or it fails.
I suspect your problem is related to "bleary eyed", the encryption and data wipe you did. Or a driver issue on your PC.
If you cannot install a custom recovery via fastboot, I would try to flash the stock firmware and start at square 1.....
Sent from my ASUS Transformer Pad TF700T using Tapatalk 4
Click to expand...
Click to collapse
Thats the wierd thing, I did not encrypt the tablet, just discovered it with the green android telling me it needed to do a full data wipe because the tablet was encrypted, I've never encrypted any of my android devices. After this process it worked fine again. Then last time I powered it off it came back up in a boot loop.
I've put the stock firmware on an sd card and the it spins for a few minutes 3 or so then reboots into boot loop.

Slarty Bartfast said:
Thats a good question, I would have thought so (always do for everything else) but now you mention it. I can't say for sure. And it won't accept the stock recovery from sd card, 5 minutes of spinning blue thing in chest then reboot into boot loop...
Is it time to start chopping onions?
Click to expand...
Click to collapse
Well, I can kind of confirm this. Without having done scientific research, but recently I fought my fastboot connection as well. It turned functional only after I checked the USB debugging thing.

_that said:
Are you sure? The bootloader mounts the /data partition to read some Android setting? Does not look plausible to me.
Click to expand...
Click to collapse
That was how I learned to fastboot. I never have problem with fastboot. I can do a test for you when I fastboot twrp 2.6.3.1 without usb debugging..
Edit: @_that
You are an expert in this area. Do you have any good advices for someone in need? Do you know why some users can not flash anything even though they follow the instructions closely? It would be nice if you can share your knowledge with new users like us...

LetMeKnow said:
That was how I learned to fastboot. I never have problem with fastboot. I can do a test for you when I fastboot twrp 2.6.3.1 without usb debugging..
Click to expand...
Click to collapse
Would be interesting.
LetMeKnow said:
Edit: @_that
You are an expert in this area. Do you have any good advices for someone in need? Do you know why some users can not flash anything even though they follow the instructions closely? It would be nice if you can share your knowledge with new users like us...
Click to expand...
Click to collapse
The real experts in this area are those who brought you wheelie and flatline... for me it looks very confusing. The twrp.blob md5sum matches mine, and I don't understand why it finishes so fast, says "OKAY" but doesn't work. If there was a problem with the fastboot protocol or with writing to flash memory, I'd expect some error message. Anyway, maybe try a different/newer fastboot binary or another USB port or another PC? I assume it's Linux on the native machine and not a VM?
I've seen a bootloader which would not flash anything in the case where someone cross-flashed a TF300 bootloader on the TF700, but I assume the OP has never tried such a crazy thing. Check the bootloader version, it should be 10.6.1.14.x.

LetMeKnow said:
Did you turn on or tick the USB debugging in the developer options? You need to turn it on in order to fastboot... Good luck..:fingers-crossed:
Click to expand...
Click to collapse
Like this
http://www.youtube.com/watch?v=q53_9tuD5HA
Next thing I ****ing know some arse is ****ing defending ASUS. Total Fanny boys.Dont help me much.May as well cut ****ing onions.

Slarty Bartfast said:
Like this
http://www.youtube.com/watch?v=q53_9tuD5HA
Next thing I ****ing know some arse is ****ing defending ASUS. Total Fanny boys.Dont help me much.May as well cut ****ing onions.
Click to expand...
Click to collapse
Wow nice response to people trying to help you.......

sbdags said:
Wow nice response to people trying to help you.......
Click to expand...
Click to collapse
I agree. Figured some people prefer failing over learning.
Enjoy your new cutting board. Should work great on peppers too. Probably will last you longer screen down - just some friendly advice....

sbdags said:
Wow nice response to people trying to help you.......
Click to expand...
Click to collapse
Indeed. Seemed like a good idea at the time. Fed up with this rubbish now, gpl'd but still managing trying to foist essentially drm on it. I think what annoys me most is the insidious and slow corruption of the ideal. Must say its partly my own fault, i have stood by and done nothing.
Apologies anyway.
Think I'll buy a Rasberry Pi.

Boot loop to recovery

Hello everyone,
I have accidentally messed up a TF700 device that my grandma received from a friend. Now I am stuck in a loop, when the device boots up directly into recovery. In recovery, I can connect with adb and reboot to bootloader with fastboot mode, where I see the three icons and I can connect with fastboot, I can even boot the stock ROM, which works fine now, because /data has been wiped.
I have been looking for recovery blob on Asus website, but it looks like Asus has totally cut off the device support, I can not find anything.
Because I have been doing lots of nasty things to the tablet, by following a guide for flashing the TF201 (long story including wrong model name on the device sticker ) the easiest solution is probably to flash the original recovery, bootloader and ROM. Does anyone has by accident the recovery blob for Bootloader 1.00e ww_epad-10.6.1.14.10-20130801 a03 ?
Or is there any other solution for the loop? The problem is that in the recovery, I can not do almost anything, no partition can be mounted, I have probably flashed recovery for TF201.
Thank you.

Yes, best would be if you reflash the Asus firmware, then start from scratch.
Geab the zip here https://www.androidfilehost.com/?fid=817550096634791660
Extract it until you see the system blob (called simply "blob"), move it to your fastboot directory and flash it in fastboot:
fastboot flash system blob
Reboot
That returns you to a stock system.
Then flash the latest TWRP, format /data, then flash your Katkiss rom of choice
Good luck
Sent from my Pixel 2 using Tapatalk

This is awesome, thank you for such quick reply. Just one more question, is it OK to flash US recovery if there is WW version bootloader? Just to be sure not to scew it even more

Yes, flash away. The bootloader is the same for WW and US, just some wifi modules are different, I think.
That firmware is US anyway and it includes the bootloader, so you'll have a US BL afterwards
Sent from my Pixel 2 using Tapatalk

OK, sounds good then
I have tried downloading the archive now several times and no matter what program I use for unpacking, I always get error. May I ask you please to verify that the file is alright?

hornmich19 said:
OK, sounds good then
I have tried downloading the archive now several times and no matter what program I use for unpacking, I always get error. May I ask you please to verify that the file is alright?
Click to expand...
Click to collapse
Works fine for me. Downloaded it and it opened without problem. Try this link, uploaded the same file here: https://www.dropbox.com/s/tz1lcspqayhs7ug/US_epad-user-10.6.1.14.10.zip?dl=0

No I just can not extract it
7-zip, winrar, gzip tried and I always get CRC error. I can however open it to see what files are inside, but not extract the blob to flash it. So maybe there was a little misunderstanding.

So Good news (partially), I have managed to find on the Internet similar package with WW. Extracted the blob and flashed to system partition. But nothing has changed, it is still booting right to recovery (FlatLine CWM)
Strange thing is, in recovery, I can not mount any partition.
Another strange thing is that in the fastboot mode, there is no blue progress bar as it used to be before I damaged it. Also it does not respond to any reboot commands. I have to do hard reset.
Any idea to try out, please?

Mhhh, maybe you have to go the super clean route.
Run these commands one after the other, letting every single one finish. Some are very fast, some take a bit longer
fastboot erase misc
fastboot erase cache
fastboot erase recovery
fastboot erase system
fastboot erase boot
fastboot erase userdata
fastboot flash system blob
fastboot reboot
If it hangs at any of the commands (30 min or more does not return to prompt) just reboot with the buttons and continue with the next command.
Good luck

Awesome, I have some progress here, thanks to you. After formating the other partitions, the fastboot screen finally started to react and the blue progressbar appeared and the blob has been flashed.
After that, I have rebooted the tablet and it was stuck on the ASUS splash screen. When I rebooted to fastboot again, and tried recovery, I got Dead Android image instead. So there was no recovery image on the partition. When I tried to select cold boot to Android, I gets stuck again. So I have at least flashed TWRP recovery back again and I can boot to that recovery.
Also it looks like, despite of what was the archive name, I have now US bootloader and not WW anymore
So how to ged rid of the ASUS splash screen now? I suspect there is no kernel and RAMdisk on the boot partition now, since I have formated it, right?
I have tried flashing the JB kernel linked in the thread here https://forum.xda-developers.com/showthread.php?t=1919961 but without any result. However I am not 100% sure about the android version.
Or maybe this is a good time to flash completely different ROM?

Ok, step-by-step...
Strange though that it did not boot after flashing the blob... hope you do not have something else going on.
The Asus blob contains everything: Every partition is reflashed with stock software so everything should be in place. The dead Android is the stock recovery showing that it cannot find anything to flash. That is perfectly normal and healthy.
Yes, do not try to piece the system together, flash a full rom now (after formatting /data in TWRP).
https://forum.xda-developers.com/tr.../guide-convert-data-to-f2fs-twrp-2-8-t3073471
I would recommend one of the KatKiss roms, the latest is here:
https://forum.xda-developers.com/transformer-tf700/development/rom-t3457417

Hello and sorry for not replying long. The baby at home was sick so I didn't have time to play with the tablet.
I have flashed the ROM you linked and the tablet finally is booting and working :victory: Or so far it looks like that
Thank you so much for your asistance here, I learned a lot on this journey.

For whatever it is worth, I just had a sudden occurrence of a similar problem. Im still using this tablet on an almost daily basis and one day it started a boot loop. When I tried the RCK it would show TWRP and then bootloop again. Followed the 'simple clean' steps and reflashed twrp and clean version of KatKiss and now good to go! Thanks @berndblb for the refresher course in fastboot commands.....