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[Q] Cannot flash custom rom

I have a asus tf300t running 4.2.1 with unlocked bootloader and root. I am running twrp v2.5.0.0 and I have already made backups of my apps. I am trying to install a custom rom. Preferably PACman rom but at this point any will do. When I try to flash the rom it go through the whole process then reboots but does not get past the asus splash screen.
What is the problem? Is it that the new bootloader does not accept any custom roms, if so how do I downgrade to 4.1? Otherwise I am open to any advice.

Holyman8388 said:
I have a asus tf300t running 4.2.1 with unlocked bootloader and root. I am running twrp v2.5.0.0 and I have already made backups of my apps. I am trying to install a custom rom. Preferably PACman rom but at this point any will do. When I try to flash the rom it go through the whole process then reboots but does not get past the asus splash screen.
What is the problem? Is it that the new bootloader does not accept any custom roms, if so how do I downgrade to 4.1? Otherwise I am open to any advice.
Click to expand...
Click to collapse
You must be on Jelly Bean 4.2.1
with the Asus Stock bootloader 10.6.1.8 and TWRP Recovery patched 2.4.4.0
or
Bootloader 10.1.15.3 and TWRP patched 2.5.0.0
You will find all versions of Stock firmwares and Stock kernels here
And the TWRP recoveries here

philos64 said:
You must be on Jelly Bean 4.2.1
with the Asus Stock bootloader 10.6.1.8 and TWRP Recovery patched 2.4.4.0
or
Bootloader 10.1.15.3 and TWRP patched 2.5.0.0
You will find all versions of Stock firmwares and Stock kernels here
And the TWRP recoveries here
Click to expand...
Click to collapse
I am currently running the 10.1.15.3 bootloader and TWRP 2.5.0.0, yet it still does not finish flashing the ROM. I even tried to flash a more simple stock based ROM, ie. black beans 8. This did not work either. It went through the twrp flash and restarted but when it got to the ASUS boot up screen it simply stopped. I waited about 10 minutes for it to possibly load however it never did. So I am restored back to my stock and am awaiting any further help.

Holyman8388 said:
I have a asus tf300t running 4.2.1 with unlocked bootloader and root. I am running twrp v2.5.0.0 and I have already made backups of my apps. I am trying to install a custom rom. Preferably PACman rom but at this point any will do. When I try to flash the rom it go through the whole process then reboots but does not get past the asus splash screen.
What is the problem? Is it that the new bootloader does not accept any custom roms, if so how do I downgrade to 4.1? Otherwise I am open to any advice.
Click to expand...
Click to collapse
In the OP for PACman rom it says you must be on android 4.1.1 to flash his rom. You need to pick a rom for your 4.2.1. I am also on 4.2.1 and run CROMI 4.6.6 with no issues. Have also succesfully tried the Energy rom. Read carefully the OP for the rom's you are considering and make sure they are for 4.2.1

Holyman8388 said:
I have a asus tf300t running 4.2.1 with unlocked bootloader and root. I am running twrp v2.5.0.0 and I have already made backups of my apps. I am trying to install a custom rom. Preferably PACman rom but at this point any will do. When I try to flash the rom it go through the whole process then reboots but does not get past the asus splash screen.
What is the problem? Is it that the new bootloader does not accept any custom roms, if so how do I downgrade to 4.1? Otherwise I am open to any advice.
Click to expand...
Click to collapse
I am having the same problem! I am running 4.2.1 and im trying to install blackbean 8 using twrp 2.5.0.0. I factory reset in twrp and wipe cache and dalvic. I then install the the rom and reboot but it will not go past the first boot screen with the tegra logo in the bottom right. It always flashes for a second but then does nothing. I have even tried cm 10.1 and it does the exact same thing. I am still able to restore back to stock. This is my first time flashing a rom so any help would be appreciated!

For the latest [ROM][4.2.2][ OFFICIAL] PAC-man v23.0.0 [OC up to 1.7GHz][New Update 22/06/2013], if you read the installation process, you need to be 4.1.1 and not 4.2.1 and also you need installed custom recovery for JB 4.1 BL !
For the latest [ROM]ASU-JellyBean-Hydro 8 (6/29/13)Liquid Butter..- Tf300 -Official 10.6.1.15.3 Base, you need to be on 4.2.1 and 10.6.15.3 bootloader
and you will see to the changelog:
...not sure if any bootloader will work...
Click to expand...
Click to collapse
Hope it's helpful for you

[Q] Installing new bootloader: brick-risk?!

My device:
- TF300
- Android 4.2.2. / CM10.1 (10.1-20130621-nightly-tf300t)
- WW_epad-10.4.2.9-20120809 (= 4.1 bootloader version)
- TWRP 2.6 recovery (for bootloader v4.1)
My aim is to update to CM10.2, therefore I need a bootloader version 4.2. I downloaded the latest firmware from the asus-website (TF300T-WW_epad-10_6_1_27_5-UpdateLauncher.zip) and put it on /sdcard.
But I'm in doubt:
- Is the asus firmwire described above the best way to upgrade my bootloader? And can I use TWRP to install this zip?
- If so, do I need to change the TWRP version to 2.6 ready for -4.2 (teamw.in/project/twrp2/97) not at all, before or after I installed the new bootloader?
I know bootloader/recovery issues can easily brick a TF300, so to be sure I ask. Thanks in advance!

Found this thread:
Quote:
Originally Posted by Nschneider7 View Post
Nope missed that and was just reading about it. Can I just flash the "TF300T-US_epad-10_6_1_27_1-UpdateLauncher" zip in TWRP? Then from there flash the new TWRP and then install CM? Or do I have to go back and let it upgrade to that point?
I flashed the blob via fastboot. Then flashed recovery via fast boot. Then cm10.2 from recovery. I was on old June build of 10.1 and 4.1 bootloader same as you. Be safe fastboot flash follow guide in q and a section
Sent from inside my mkv.
Same question, but not exactly answered: can you do this without a cable connection with your pc?

X10i/3011 said:
Found this thread:
Quote:
Originally Posted by Nschneider7 View Post
Nope missed that and was just reading about it. Can I just flash the "TF300T-US_epad-10_6_1_27_1-UpdateLauncher" zip in TWRP? Then from there flash the new TWRP and then install CM? Or do I have to go back and let it upgrade to that point?
I flashed the blob via fastboot. Then flashed recovery via fast boot. Then cm10.2 from recovery. I was on old June build of 10.1 and 4.1 bootloader same as you. Be safe fastboot flash follow guide in q and a section
Sent from inside my mkv.
Same question, but not exactly answered: can you do this without a cable connection with your pc?
Click to expand...
Click to collapse
Honestly, I'd rather be safe than sorry when upgrading bootloaders. So I would always suggest using the cable connection because it is less likely to fail. You probably could get away without using it to flash stock, but you wouldn't be able to flash TWRP without fastboot, and then couldn't flash a custom ROM. But everything feels safer once you have Nvflash backups.

X10i/3011 said:
My device:
- TF300
- Android 4.2.2. / CM10.1 (10.1-20130621-nightly-tf300t)
- WW_epad-10.4.2.9-20120809 (= 4.1 bootloader version)
- TWRP 2.6 recovery (for bootloader v4.1)
My aim is to update to CM10.2, therefore I need a bootloader version 4.2. I downloaded the latest firmware from the asus-website (TF300T-WW_epad-10_6_1_27_5-UpdateLauncher.zip) and put it on /sdcard.
But I'm in doubt:
- Is the asus firmwire described above the best way to upgrade my bootloader? And can I use TWRP to install this zip?
- If so, do I need to change the TWRP version to 2.6 ready for -4.2 (teamw.in/project/twrp2/97) not at all, before or after I installed the new bootloader?
I know bootloader/recovery issues can easily brick a TF300, so to be sure I ask. Thanks in advance!
Click to expand...
Click to collapse
I was in the same situation as you not so long ago. Was on 4.1.1 with TWRP 2.6.3.0 JB installed. Asked myself these questions repeatedly. I updated via fastboot to the staging partition using the blob within the latested ASUS firmware zip file. The blob file contains, bootloader, recovery, system and boot. This means your are essentially returning to stock everything upon flashing. This was a huge sigh of relief as I didn't want to brick my device because of the same concerns you have. So I flashed via fastboot to 10.6.2.10 then flashed to TWRP 2.5.0 4.2 as 2.6.3.0 didn't work for me for some reason. I heard a number of people say that 2.6.3.0 4.2 is buggy and suggested to stay with 2.5.0 in which I would recommend from experience. Then flash your custom firmware.

Pretty lost by now. I am still (sick of it) on an unlocked Asus stock 4.2.1 with TWRP 2.5. My intention is to change the ROM but was considering CM 11 which I understand does require TWRP 2.6.X at least. I was hoping for a fix for installing navflash on post JB but I believe does not possible so anything that means touching the bootloader makes me very concern.
I was wondering:
- Can I flash TWRP 2.6 (4.2 img file i beleive) directly from my already installes TWRP 2.5 bootloader and then install CM 11? or do I need fastboot process again?
- Is CM 11 worth on the TF300? I just need some stability and reasonable speed after having so many problems with the stock rom.
Thanks.

luison said:
Pretty lost by now. I am still (sick of it) on an unlocked Asus stock 4.2.1 with TWRP 2.5. My intention is to change the ROM but was considering CM 11 which I understand does require TWRP 2.6.X at least. I was hoping for a fix for installing navflash on post JB but I believe does not possible so anything that means touching the bootloader makes me very concern.
I was wondering:
- Can I flash TWRP 2.6 (4.2 img file i beleive) directly from my already installes TWRP 2.5 bootloader and then install CM 11? or do I need fastboot process again?
- Is CM 11 worth on the TF300? I just need some stability and reasonable speed after having so many problems with the stock rom.
Thanks.
Click to expand...
Click to collapse
Yes, CM11 requires TWRP 2.6.3.1.
You can install NvFlash on a JellyBean Bootloader, link and guide is in my signature.
If you bootloader is above 10.6.1.8, you can just flash the TWRP 2.6.3.1 and then reboot and then flash CM11 + gapps.
I think it is super smooth with the OC Kernel.

[Q] Rolling back to stock ROM fails

Hello.
i have problems rolling back to stock ROM.
currently i have Pacman rom 4.4.4, i tried to go back to official asus rom, downloaded from asus web site.
i read that i need to have 4.2 bootloader, so i noticed that in my TAB i have TWRP 2.8, i flashed to TWRP 2.5, and after that tried to
flash couple of roms,include the official rom, unfortunately, without success. after each flash, i got the asus logo, and that's all.
when i try and get into bootloader, i get the android with a ! mark and i need to re flash boot loader.
after couple hours i flash back to TWRP 2.8 and restore pacman rom.
what i need to to do to go back to official asus latest rom?
thanks.

ariebk said:
Hello.
i have problems rolling back to stock ROM.
currently i have Pacman rom 4.4.4, i tried to go back to official asus rom, downloaded from asus web site.
i read that i need to have 4.2 bootloader, so i noticed that in my TAB i have TWRP 2.8, i flashed to TWRP 2.5, and after that tried to
flash couple of roms,include the official rom, unfortunately, without success. after each flash, i got the asus logo, and that's all.
when i try and get into bootloader, i get the android with a ! mark and i need to re flash boot loader.
after couple hours i flash back to TWRP 2.8 and restore pacman rom.
what i need to to do to go back to official asus latest rom?
thanks.
Click to expand...
Click to collapse
You can do this with the zip you got from asus as long as the SKU matches what is on your tablet ....
So do this unzip the zip you downloaded .. There will be another zip, unzip it as well ...
Inside that zip there will be a blob file.... This blob file can be flashed using fastboot ...
This blob will return you to stock.... Let me know if you need anymore help ...
Thx Josh

Downgrade & nvflash question

Hi,
I am currently running Zombi-pop 5.02 B4 and has TWRP 2.8.7 Kang on my TF700T. I would like to have nvflash access, can I downgrade to a JB stock version that allows such access? and if yes which stock rom and which boot loader?
many thanks

satnile said:
I am currently running Zombi-pop 5.02 B4 and has TWRP 2.8.7 Kang on my TF700T. I would like to have nvflash access, can I downgrade to a JB stock version that allows such access? and if yes which stock rom and which boot loader?
Click to expand...
Click to collapse
You don't need to downgrade, you can install the flatline recovery, pull your blobs, then reinstall TWRP.

_that said:
You don't need to downgrade, you can install the flatline recovery, pull your blobs, then reinstall TWRP.
Click to expand...
Click to collapse
Really, this is helpful. I was under the impression that a stock JB boot loader is required for nvflash to work. I shall give it a try and report back.
Many thanks

I have successfully done the nvflash access and generated the blobs for my TF700T and stored them in triplicates. My question now is that I have been left with AndroidRoot 10.6.1.14.4 bootloader and a primitive flatline recovery, can I flash TWRP Kang 2.8.6.0 back without problem?
many thanks once again.

Congrats! Yes, flash TWRP kang, reboot, then flash the stock bootloader from here: http://forum.xda-developers.com/showpost.php?p=55238386&postcount=3
Reboot
All is good

Flatline CWM recovery couldn't flash the zips for bootloader and TWRP Kang, so I flashed the TWRP img via fstboot first, then booted into TWRP recovery and flashed the bootloader zip and it worked fine, no bricking whatsoever.

[Q] Why I cannot get TWRP?

Gents,
funny question.
I just installed by Odin the very last firmware (COI1) with custom image from here, and
looks like it is locked and now I stuck with the stock ROM...
No chance to put back TWRP...
Before everything was fine.
I tried bootloader from this post, no luck.
Any advice how to get TWRP back or just how to revert to custom image?..

You could just flash TWRP via odin by downloading a flashable zip and to install custom software you'll have to install TWRP or any other custom recovery first. After installing twrp go to install and flash the rom from there. Reply and will help you further!

That's the exact problem: after Odin I still don't have TWRP...