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Fastboot does not find device [Zync Z930 tablet]

Hi there,
I am trying to access my device (Zync Z930 tablet) in fastboot mode. Therefore I started it by pressing Vol Up + Power until blue light appears and connect it to the PC (running Lubuntu 64bit).
Verifying connectivity with lsusb results in:
Code:
[email protected]:/home/badday/Downloads# lsusb
(...)
Bus 002 Device 011: ID [B]1b3f[/B]:8300 Generalplus Technology Inc.
So the device seems to be present. I also added /etc/udev/rules.d/51-android.rules with
Code:
SUBSYSTEMS=="usb", ATTRS{idVendor}=="1b3f", ATTRS{idProduct}=="8300", MODE="0666", OWNER="badday"
and made sure that rights are correct:
Code:
[email protected]:/home/badday/Downloads# chmod a+r /etc/udev/rules.d/51-android.rules
[email protected]:/home/badday/Downloads# service udev restart
However, fastboot does not find the device:
Code:
[email protected]:/home/badday/Downloads# ./fastboot devices
[email protected]:/home/badday/Downloads# ./fastboot -i 0x1b3f getvar VERSION
< waiting for device >
As you can see I am running it as root. When booted normally, device is recognized (of course with different vendor ID etc.) with adb and I can make it boot to recovery mode, but not to bootloader mode. Trying to do so will result in a normal reboot (from what I can see).
Anyone having some idea?
Thanks a lot,
badday

root
badday2 said:
Hi there,
I am trying to access my device (Zync Z930 tablet) in fastboot mode. Therefore I started it by pressing Vol Up + Power until blue light appears and connect it to the PC (running Lubuntu 64bit).
Verifying connectivity with lsusb results in:
Code:
[email protected]:/home/badday/Downloads# lsusb
(...)
Bus 002 Device 011: ID [B]1b3f[/B]:8300 Generalplus Technology Inc.
So the device seems to be present. I also added /etc/udev/rules.d/51-android.rules with
Code:
SUBSYSTEMS=="usb", ATTRS{idVendor}=="1b3f", ATTRS{idProduct}=="8300", MODE="0666", OWNER="badday"
and made sure that rights are correct:
Code:
[email protected]:/home/badday/Downloads# chmod a+r /etc/udev/rules.d/51-android.rules
[email protected]:/home/badday/Downloads# service udev restart
However, fastboot does not find the device:
Code:
[email protected]:/home/badday/Downloads# ./fastboot devices
[email protected]:/home/badday/Downloads# ./fastboot -i 0x1b3f getvar VERSION
< waiting for device >
As you can see I am running it as root. When booted normally, device is recognized (of course with different vendor ID etc.) with adb and I can make it boot to recovery mode, but not to bootloader mode. Trying to do so will result in a normal reboot (from what I can see).
Anyone having some idea?
Thanks a lot,
badday
Click to expand...
Click to collapse
Hey can you please guide me how did you root this device? I am having the same and I need to root it. Thanks.

badday2 said:
Hi there,
I am trying to access my device (Zync Z930 tablet) in fastboot mode. Therefore I started it by pressing Vol Up + Power until blue light appears and connect it to the PC (running Lubuntu 64bit).
... [CUT FOR SPACE] ...
Thanks a lot,
badday
Click to expand...
Click to collapse
I have the exact problem badday has, but with the Ainol Novo7 Paladin. Any help will be appreciated in my corner as well!

Unable to root Zync z930
I have the same need to root the Zync z930 tab, currently there is nothing available on the internet to root this tab. If anyone of you manages to crack it please let me know, thanks!
---------- Post added at 08:27 PM ---------- Previous post was at 08:22 PM ----------
I have the same need to root the Zync z930 tab, currently there is nothing available on the internet to root this tab. If you managed to crack it please let me know, thanks!

To clarify things: I did not root my device so far.

Some additional information I found out:
Try to reboot in adb via "reboot-bootloader" results in normal startup. Furthermore, booting to fastboot mode (with vol-up-button down) with Micro-SD-Card inserted makes the device not to appear any more in lsusb.
Anyway, that made me having even less clues than more :crying:

This is cheap chinese phone with an equally defective android implementation. The battery just lasts about an hour, I am sick of it.

abdulmomin said:
This is cheap chinese phone with an equally defective android implementation. The battery just lasts about an hour, I am sick of it.
Click to expand...
Click to collapse
Anyone found any method to root z930?

I'm not sure for linux but I think you will have to download drivers ,,,,,,,I had to do this for my computer (running win 7) to read my phone in fast boot
I downloaded an app called driver tools and that fixed it ....hope this helps
Ps : It maybe that your running 64 bit Os

@abdulmomin, jaydeepkhalpada: Rooting thread can be found here: http://forum.xda-developers.com/showthread.php?t=2028740
@fredworxz: Yes, I use a 64bit OS. However, for GNU/Linux drivers should not be needed as adb runs out of the box (please correct me if I am wrong).

Resolved! - See my post! http://forum.xda-developers.com/showthread.php?t=2045173
I've not only installed JB in Z930 but also successfully ADB'd it to root it
Here:
http://forum.xda-developers.com/showthread.php?t=2045173

Actually I cannot install the driver which might be some problem as I use 64bit OS and have no 32bit available. Anyhow, according to the name scheme, there should also be a 64bit version included.
Apart from that I have also problems with this Chinese software, does it need adb drivers to be installed? Actually when I boot in this mode with vol-up-button, there appears absolutely nothing in the device manager.
Would be great if you could help me out as I need this tablet for some sort of NGO project.
Greetings from Delhi,
badday

This is not fastboot mode
as your trying to unlock fastboot ,but this is not fastboot mode
this is for flashing firmware through G+massprotection tool..
There is no fastboot mode in Z930..
but you can goto recovery menu by pressing
1st press & release Power button then press and hold vol+ button

[Q] Windows drivers for Nabi2

I've read a couple dozen of the pages from http://forum.xda-developers.com/showthread.php?t=1905674&page=95 titled
Nabi2 root and Gapps install
Click to expand...
Click to collapse
.
Using Win7 x64. Nabi2 version: 1.9.37 recently updated.
Can't post to above thread because this is my first post (restricted to "General" forums).
In "Jmz Nabi Recovery Installer" window it is always stuck in the "If stuck here drivers are not installed" step.
Prior to installing "PdaNet for Android" from http://junefabrics.com/index.php,
I had 2 devices in Control Panel under "Other devices" with a yellow '!'. One of the looked like the Nabi device. The other is named "MTP".
After installing PdaNet, only MTP remains with the yellow exclamation point.
What should the Nabi look like in the Control Panel if its properly configured with a driver and where would it be?
And what is MTP?
Apparently I'm still having a driver/connection problem from adb.
USB Debugging is on in the Nabi.

Put the nabi in 'fastboot' mode
Open a CMD Prompt and browse to the 'files' folder within 'jmzrootpackage'
Then type:
adb.exe
fastboot devices
It should return a value (fastboot working and drivers are installed)
Let me know how it goes.

Put the nabi in 'fastboot' mode
Open a CMD Prompt and browse to the 'files' folder within 'jmzrootpackage'
Then type:
adb.exe
Click to expand...
Click to collapse
Part of this command is missing right? Without input parms it just outputs the "uses" message.
fastboot devices
Click to expand...
Click to collapse
Unfortunately this returned nothing for me.
I'm glad you responded. Other suggestions?

Here is how i done it using Windows 8 x64
I done 3 nabi2's this way but had a lot of trouble first so here is what worked for me:
Sadly, i don't have any nabi2 with me now to explain exactly how i done it
1) First boot the Nabi2 normally and turn off usb debugging.
2) When fully booted connect USB cable.
3) Check device manager and drivers should be installed.
4) Unplug USB cable and turn on USB Debugging and Unknown Sources.
5) Reconnect USB Cable.
6) Drivers should install.
7) Install PDA Net on Laptop/PC
8) Select Samsung device from option screen when installing.
9) Wait for install to complete and drivers to install
10) Shut down Nabi2
11) Boot Nabi in fastboot (Hold + and Power buttons)
12) Select fastboot protocol
13) Here i seen Windows 8 take about 60 seconds installing fastboot drivers
To make sure fastboot drivers are installed i went to this thread
Code:
http://forum.xda-developers.com/showthread.php?t=1590800
and download ADB (save it to C:\SDK\platform-tools) and read over the helpful instructions in the thread.
Open command Prompt
Type the following (shown in RED) in the CMD window the opened:
cd\
cd C:\SDK\platform-tools
adb.exe (a list of options should be listed)
fastboot devices (it should list a number after you enter this)
If number displayed then you are good to go.
Reboot Nabi2 and wait to complete
Go to the location you saved jmzrootpackage
Go to files folder inside jmzrootpackage
Double click install.bat
Follow on screen prompts ( I took option 1)
TWRP recovery installs
I had trouble installing GAPPS.zip with an error being displayed about unable to mount /data
I copied GAPPS.zip to a SD Card and inserted to Nabi2
i install zip from EXT-SD Card even though it gives a load of errors about not able to mount /data
Wipe Cache/Dalvik
Reboot Nabi2
Go to daddy/mommy mode and you should have Google Apps installed.
Any problems let me know.

I'm using Windows 7 x64.
Your instructions with selecting "Samsung" for PdaNet install appears
to have done something right. So maybe I'm a little closer.
It completed the PdaNet install successfully and when I reconnect the
Nabi I see a message popup on Windows saying PdaNet connected something.
(It was too quick.)
So maybe I'm not doing the "Fastboot" portion correctly.
On Nabi hold <Power> and <Vol+> down at same time to turn it on.
Resulting Menu:
Boot Normally
Fastboot Protocol
Recovery Kernel
Forced Recovery​
Use <Vol-> to move the selected item.
Moved selected item down to "Fastboot Protocol".
Use <Vol+> to "enter" selected item.
New Menu:
Bootloader
Continue
Reboot-bootloader
Reboot
Poweroff​
Selected "Continue", and entered(<Vol+>).
At this point the Nabi boots up.
On PC in adminstrator mode for command window and with ALL anti-virus
security turned off:
> adb.exe kill-server
> adb.exe start-server
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
> fastboot.exe devices
Nothing. (sigh)

After looking at Victoria Antonio's youtube of this process I'm convinced the driver install is still not correct.
Somehow it gets mucked up when I use PdaNet. Not sure how or why.
To make this picture clearer I posted some screen shots on my website: http <colon, 2 forward slashes>skippyvondrake.com
I hope someone can tell me how to unmuck what I've mucked.

skippyV said:
Selected "Continue", and entered(<Vol+>).)
Click to expand...
Click to collapse
Don't press Continue on the Nabi after selecting fastboot protocol
After selecting fastboot protocol leave it.
skippyV said:
> fastboot.exe devices
Click to expand...
Click to collapse
The command is:
fastboot devices
not
fastboot.exe devices

Thanks for telling me about when I'm in fastboot mode.
I DO get a device number when in fastboot mode and from 'fastboot devices'
But adb still cannot "see" the device. All commands using adb result in:
error: device not found
Regardless of what mode the Nabi is in.

SOLVED
I finally decided to try this with a different computer. Same OS and architecture.
But this computer didn't have various android development "kits" installed previously.
And it worked without a hitch.
The youtube by Victoria Antonio pointed out a few nuances I didn't know.
And you helped too, BBKGTTDi, so giving you "thank you" points.
Chow!

Glad you got it work SkippyV
I just need to figure out now, when i download a game to the Nabi2 from the playstore, how to get it so show in the kids mode

BBKGTTDi said:
Glad you got it work SkippyV
I just need to figure out now, when i download a game to the Nabi2 from the playstore, how to get it so show in the kids mode
Click to expand...
Click to collapse
When I get there - if I figure it out - I'll send you a private email sense that would be a different "thread'. There are other nuances I've noticed too...

show game in Nabi mode after rooting
@BBKGTTDi, I thought there would be a way to send private messages/emails on this forum - but I don't see it.
I ran into the same problem after rooting the Nabi. The "Add Apps" app doesn't work as its supposed to.
It worked prior to rooting.
It does list the newly installed apps, but selecting them for Nabi-Mode, rebooting, and they aren't there.
Only visible in Mommy/Daddy mode.
So if you figure it out please let me know!

The "Add Apps" app is working correctly now. Don't know what happened before.
I must be getting "Nabi-ed out".
Let me know if you're still having troubles.

skippyV said:
I'm using Windows 7 x64.
Your instructions with selecting "Samsung" for PdaNet install appears
to have done something right. So maybe I'm a little closer.
It completed the PdaNet install successfully and when I reconnect the
Nabi I see a message popup on Windows saying PdaNet connected something.
(It was too quick.)
So maybe I'm not doing the "Fastboot" portion correctly.
On Nabi hold <Power> and <Vol+> down at same time to turn it on.
Resulting Menu:
Boot Normally
Fastboot Protocol
Recovery Kernel
Forced Recovery​
Use <Vol-> to move the selected item.
Moved selected item down to "Fastboot Protocol".
Use <Vol+> to "enter" selected item.
New Menu:
Bootloader
Continue
Reboot-bootloader
Reboot
Poweroff​
Selected "Continue", and entered(<Vol+>).
At this point the Nabi boots up.
On PC in adminstrator mode for command window and with ALL anti-virus
security turned off:
> adb.exe kill-server
> adb.exe start-server
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
> fastboot.exe devices
Nothing. (sigh)
Click to expand...
Click to collapse
I ve got the same problem using windows xp, 7 or 8.1 after OTA update to jellybean.
Any ideas of what is going on?

arvati said:
I ve got the same problem using windows xp, 7 or 8.1 after OTA update to jellybean.
Any ideas of what is going on?
Click to expand...
Click to collapse
I did have those problems last year. Still think they were driver related.
I use mehtuus's package now. He has a useful install script.
http://forum.xda-developers.com/showthread.php?t=2172843
And when I want to use adb in "manual" mode I just launch a command prompt from his
'adb' directory (package is named 'mn2ri-v1.5.0-beta2.zip').
Try playing with his installer. And see if anything is displayed using:
Code:
adb devices

Thanks skippyV. I got it in fastboot last week with ubuntu and installed TWRP sucessfully.

[Q] HELP HELP HELP Bricked

Ok here goes.. I have a ASUS TF101 and tryed to install Cyanogenmod 9 on it and to my amazment it worked but then it shut off after a min and now is stuck on the 1st boot screen (EEE Pad) I tryed to restore stock rom in recovery but nothing happened then I tryed using easyflasher and couldn't enter into apx mode the only thing I can do is enter recovery mode and see that its running ClockworkMod recovery 6.0.1.3
Please help me

Meat6911 said:
Ok here goes.. I have a ASUS TF101 and tryed to install Cyanogenmod 9 on it and to my amazment it worked but then it shut off after a min and now is stuck on the 1st boot screen (EEE Pad) I tryed to restore stock rom in recovery but nothing happened then I tryed using easyflasher and couldn't enter into apx mode the only thing I can do is enter recovery mode and see that its running ClockworkMod recovery 6.0.1.3
Please help me
Click to expand...
Click to collapse
How did you install CWM 6.0.1.3? Did you use ROM Manager? If so, that is your problem.
You need to get a working recovery installed.
Are you sure you could not get into APX Mode? It is a black screen and the only indication is that your computer detects new hardware.
If you cannot get into APX to use EasyFlasher or NVFlash, is your tablet recognized as an ADB device in CWM? If so you can push a new recovery using the dd command. I would recommend checking out TWRP.
To install TWRP via ADB, download the latest TWRP from here: http://techerrata.com/file/twrp2/tf101/openrecovery-twrp-2.3.2.3-tf101.blob
Save it as TWRP.blob in an easy to find place (like c:\TWRP.blob)
Connect your tablet to your PC and update the driver and use the Universal Naked Drivers
Put the adb.exe file in the c:\ folder as well (in the EasyFlasher Tools folder)
Open a command prompt (WIN+R, type CMD and click OK)
Code:
adb devices
(if connected, should show a device connected)
adb push c:\TWRP.blob /sdcard/
adb shell
cd /sdcard/
ls -a -l
(check for TWRP.blob)
dd if=/sdcard/TWRP.blob of=/dev/block/mmcblk0p4
reboot
Do not try to enter recovery until after it reboots past the Eee Pad logo (and shows the progress indicator). This is when it acutally updates the recovery.
Once you see it get past the Eee Pad screen hold VOL DOWN and POWER for about 12-15 seconds and then press VOL UP once you see the small text and it should boot to TWRP recovery.​
Here are the ADB commands to run:

When I connect to PC it makes the connection sound but doesn't show as a removable drive so I can't use Easyflash or any program like that also like I said APX mode wont work it makes the sound that it detects the tablet but then makes the remove sound right away. and this happened when I installed the Cyangenmod 9. I found someone who says he may be able to fix it for $50 using Odin but I am worried that he wont be able to and its an hour drive to take it to him... At this point I just want it back to stock ...

erm... ODIN won't work with a transformer, it's only for samsung devices.
Alright, you probably used ROM manager judging by your Recovery version.
You need to just NvFlash the device back to stock:
Download your region's Stock ROM from here: (WW if outside of US, US if inside.) Stock Rom
Download Wheelie NvFlash tool from here: Wheelie
Unzip the stock rom .zip first, into it's own folder. Then unzip the wheelie tar.bz2 into the folder you just made by unzipping the stock rom. Overwrite any files with the wheelie files.
Next find out your Sbk variant, Look at the serial number on the sticker on the bottom of your tablet.
If it says B70, or a higher number like B80 or any C, then you are Sbkv2
If the number is B60 or lower, you are Sbkv1.
Remember this for the next step.
Make sure the tablet is off totally, Then hold the Volume-UP key and Then press power, keep holding volume up. It will enter APX mode.
Plug it into your computer, the screen will stay blank.
It should be detected, if it says unknown device or similar, use the windows device manager to select the 'asus bootloader interface' or 'Unknown device' or similar, with Nvidia ASUS or APX or Bootloader, something along those lines, to update the driver, right click this and navigate to the 'usbpcdriver' folder in the folder you unzipped earlier. It will install and detect.
Then run the .bat file that says Reflash_(Your Sbk version).bat while the tab is connected in apx mode.
It will return to stock, give it time, DO NOT UNPLUG IT.
The screen may flash, and the tablet may/will reboot.
When done you will be on Stock latest from ASUS.
If you want safe root / recovery, download and run my PERI tool, link in signature.
good luck.

ok I am trying that now but I wish I had someone to walk me through everything in real time...

OMG you are the best Thing O Doom I bow down to your all mighty knowledge lol thank you

Meat6911 said:
OMG you are the best Thing O Doom I bow down to your all mighty knowledge lol thank you
Click to expand...
Click to collapse
erm, I guess it worked?
The best thing you can do for someone on xda is hit the 'thanks' or donate buttons, and thanks is free!
Any other questions, I'm guessing it worked alright?

frederuco said:
How did you install CWM 6.0.1.3? Did you use ROM Manager? If so, that is your problem.
You need to get a working recovery installed.
Are you sure you could not get into APX Mode? It is a black screen and the only indication is that your computer detects new hardware.
If you cannot get into APX to use EasyFlasher or NVFlash, is your tablet recognized as an ADB device in CWM? If so you can push a new recovery using the dd command. I would recommend checking out TWRP.
To install TWRP via ADB, download the latest TWRP from here: http://techerrata.com/file/twrp2/tf101/openrecovery-twrp-2.3.2.3-tf101.blob
Save it as TWRP.blob in an easy to find place (like c:\TWRP.blob)
Connect your tablet to your PC and update the driver and use the Universal Naked Drivers
Put the adb.exe file in the c:\ folder as well (in the EasyFlasher Tools folder)
Open a command prompt (WIN+R, type CMD and click OK)
Code:
adb devices
(if connected, should show a device connected)
adb push c:\TWRP.blob /sdcard/
adb shell
cd /sdcard/
ls -a -l
(check for TWRP.blob)
dd if=/sdcard/TWRP.blob of=/dev/block/mmcblk0p4
reboot
Do not try to enter recovery until after it reboots past the Eee Pad logo (and shows the progress indicator). This is when it acutally updates the recovery.
Once you see it get past the Eee Pad screen hold VOL DOWN and POWER for about 12-15 seconds and then press VOL UP once you see the small text and it should boot to TWRP recovery.​
Here are the ADB commands to run:
Click to expand...
Click to collapse
I had similiar problem when I tried to downgrade and go back to stock. After flashing stock from asus, I did it wrong by unzipping (stock_ics_kernel_9.2.1.24US-secure) first then flash the file under the downloaded zip files. Now I am also stuck at Eee Pad, can't get into recovery because it probably wiped out everything. Hopefully this can recover my Eee Pad!!!! I got my fingers cross. This may be my only hope for my asus pad .

Ok so off topic question how can I watch videos online from like 1channel or other streaming sites and what is the best ad blocker and antivirus to use

Meat6911 said:
Ok so off topic question how can I watch videos online from like 1channel or other streaming sites and what is the best ad blocker and antivirus to use
Click to expand...
Click to collapse
You should be able to with Dolphin HD browser and Flash installed, make sure flash is integrated into the Dolphin. That or the sites should just work..
I use Adaway.

Guide to fix TWRP or CWM bootloop

This is how i fix my TF300TG stuck on recovery. I hope the steps descried below will help.
Long story, short:
For some reasons, seems like the WIPE command from TWRP and CWM recovery screw the partitions.
No partitions or microSD card can be mounted.
The tablet is now booting only in recovery mode or in fastboot mode (the screen with three icons - RTK, Android and WIPE) instead of Android.
IMPORTANT:
If your tablet reboot in fastboot mode DONT WIPE IT AGAIN! Just skip step 4.
First of all, MAKE SURE YOR BATTERY IS CHARGED!
Recharge your tablet for at least two hours.During the flashing process the tablet doesn`t charge.
Use the original Asus USB cable that came with the tablet or a high quality replacement cable. Cheap cables can and will cause problems.
Use a laptop or desktop with known good USB ports. If you have problems, try a diferent computer, some USB chips can cause troubles.
Disable the antivirus or screensaver, sleep etc...
1.Download these files:
from ASUS website: http://www.asus.com/Tablets_Mobile/ASUS_Transformer_Pad_TF300TG/#support
Drivers&Tools, on the OS tab select Android
click on Utilities and download latest version of ASUS PC Sync (you will need this for drivers)
click on Firmware and download the lastest available (you will need this for BLOB file)
Minimal ADB and Fastboot: http://d-h.st/gbx
install ASUS PC Sync and Minimal ADB and Fastboot (on fastboot installer check the box that make a shortcut to desktop)
unzip the firmware file downloaded from ASUS site
you will get a second zip file, unzip this one too
the folder unzipped from the second one contain a file called blob
copy or move the folder to the root of your drive C: or D: or whatever drive letter you have
2.Installing drivers:
connect your tablet to PC
you will get a message about Windows couldnt find driver bla...bla, ignore it and keep your tablet plugged
IMPORTANT: even if you previously installed ASUS PC Sync or other drivers and Windows recognize your tablet, you still need to change the driver.
right-click on My Computer-Properties and click Device Manager
find the Asus Android device - should be with an exclamation mark on it (the driver is not installed sign)
right-click on it and choose:
Update Driver Software..., Browse my computer for driver software, Let me pick from a list of device drivers on my computer, Have disk, Browse
go to C:\Program Files or Program Files (x86), ASUS, ASUS Android USB Drivers, Android and select android_winusb.inf
Asus Android Composite ADB interface will appear in the list of device drivers - don`t hit next yet!
uncheck Show Compatible Hardware and select Asus Android Bootloader Interface from the list, now hit next
3.ADB mode:
open Minimal ADB and Fastboot from desktop - from this point, keep it open
type: adb devices - and you should see some numbers under the List of device attached - thats your tablet
if you can`t see the tablet, try this command: adb start-server
4.Booting to "fastboot":
there are two ways to do this:
a) from adb window type: adb reboot bootloader
or
b) reset and hold vol-down (didn`t work for me, but maybe will work for someone else)
the three icons will appear on screen - NOW YOU ARE IN FASTBOOT MODE
if none of the above work try this:
in adb window type: adb reboot
wait until the tablet enter in recovery menu and type in adb window:
adb shell dd if=/dev/zero of=/dev/block/mmcblk0p3
adb reboot bootloader
5. Flasing the blob
the credits for this part goes to buster99. He is the one who figured out the right commands for formatting partitions and flashing back the OS
here is his post: http://forum.xda-developers.com/showpost.php?p=44244313&postcount=12
here we go, one at the time in adb window:
fastboot erase system
fastboot erase recovery
fastboot erase userdata
fastboot erase boot
fastboot erase misc
fastboot erase cache
fastboot -i 0x0B05 flash system x:\your blob folder\blob (here you enter the path to your blob file, must end with blob, to point at the file)
fastboot -i 0x0B05 reboot
THE FLASH SYSTEM COMMAND WILL TAKE SOME TIME
be pacient and wait until the progress bar is 100% full on the tablet and you get the command prompt back in the adb window.
After reboot, the Android is back on.
Cheers and good luck!!

A big thank you alexhosu,
several months ago that my tablet was blocked, but I still kept hope
a solution would be found. I'm really happy for you and thank you again for sharing.
Long live XDA

me too
Thanks from me too; was enjoying 5.0 (timduru) on my TF300 when I went to upgrade and idiotically managed to get into a TWRP bootloop(interrupted a format of \data and then used 'wipe' from the boot screen by mistake...)
Your solution has saved my tablet
Am now carefully reinstalling Katkiss

Thanks
This saved my (veggie) bacon too, something went wrong when flashing new ROM (most likely user error - e.g. my fault). Tablet woud go into an eternal boot wouldn't finish booting, nandroid recovery did the same. Used this technique and have a working stock ROM from which I intend to reinstall TimDuru's Lollipop.
Thanks again

Followed the instructions.. Worked well, but getting error 963 when installing/updating anything in Play Store. Seems to be related to storage permissions. Some users are suggesting using format instead of erase. What's the difference? Could that help.
I did factory reset, reflashed and used fix permissions in TWRP but no luck...
alexhosu said:
This is how i fix my TF300TG stuck on recovery. I hope the steps descried below will help.
Click to expand...
Click to collapse

Big thanks from me.
I killed my tablet with an accidental restore to factory defaults while in cm12, an got stuck in an endless bootloader boot loop.
my tablet came back too life at the end of section 4 after adb shell dd if=/dev/zero of=/dev/block/mmcblk0p3.
although getting adb to talk to the tablet was a fluke.
I just kept trying to send "adb shell dd if=/dev/zero of=/dev/block/mmcblk0p3" while the tablet was loading (boot looping)

6 months of believing my tablet was dead, after letting CM12 do its own update thing, and now, thanks to the above instructions, I'm back online and its working with the stock rom.
Thank you so much for this. No idea why I couldn't find these instructions before, then I just gave up, back in business now!

Thanks a lot for your guide, this is what helped me fortunately unbrick my device, i was stuck in a boot loop with a broken recovery

Another tablet saved. Know your work is appreciated.

i have the same problem, the system doesn't pass the ASUS logo, i tired to log into fastboot (reset + volume down) and i was able to see the three icons but adb doesn't recognize my device. i see the drivers are correctly installed but no working adb. Any help is highly appreciated.

ajeevlal said:
i have the same problem, the system doesn't pass the ASUS logo, i tired to log into fastboot (reset + volume down) and i was able to see the three icons but adb doesn't recognize my device. i see the drivers are correctly installed but no working adb. Any help is highly appreciated.
Click to expand...
Click to collapse
Did you try entering "fastboot devices" or just "adb devices"? adb wont find your device in the bootloader, but using fastboot commands should unless it truly is not connecting for some reason.

Act32.97 said:
Did you try entering "fastboot devices" or just "adb devices"? adb wont find your device in the bootloader, but using fastboot commands should unless it truly is not connecting for some reason.
Click to expand...
Click to collapse
yeah Fastboot devices worked but it was not letting me flashing the rom, when i push the blob file it says 'sending' and stays in the same state for days.

ajeevlal said:
yeah Fastboot devices worked but it was not letting me flashing the rom, when i push the blob file it says 'sending' and stays in the same state for days.
Click to expand...
Click to collapse
I would try moving the blob to the root of the C drive and try the 7th command "fastboot -i 0x0B05 flash system C:\blob" just to make sure sometime of file permission type issue isn't happening on the pc side. Other than that the only kind of issue I think it could be would have to be the connection with the drivers, although if erasing the partition's works fine, I don't really see what could be going on.

I followed all the steps and delete, but when loading the file update.blob I get this error:
C: \ Users \ mikel> C: \ Users \ mikel \ Android \ android-sdk \ platform-tools \ fastboot flash system update.blob
error: can not load 'update.blob'
Can someone help me out?

TF300T KissKat
Theziggy said:
This saved my (veggie) bacon too, something went wrong when flashing new ROM (most likely user error - e.g. my fault). Tablet woud go into an eternal boot wouldn't finish booting, nandroid recovery did the same. Used this technique and have a working stock ROM from which I intend to reinstall TimDuru's Lollipop.
Thanks again
Click to expand...
Click to collapse
Hey, I know that I'm a couple years late on this. But, I was just given a Asus Transformer TF300T, and attempted to install the Kisskat custom rom. I unlocked the device with little issues. Rooted with little issues. But when it came to flashing the rom. I get his error saying that "no MD5 file found" and holds it there for a couple of minutes. Then gives me the failed install. My only option is to boot into recovery and restore the stock JB 4.2. If you could point me in the right direction, I would greatly appreciate it. I've searched the forum for someone with a similar issue, and couldn't find it. I hope that I'm not alone on this one. It would kill me to be stuck with the stock rom.

Hi i made a format data from TWRP recovery, and now i am in a recovery loop and got error of mount partitions, i can access to recovery and the screen with 3 icons, but when i plug to my pc it shows as uknown usb, i install the drivers but dosent reconose as a fastboot device, in minimal adb when i write fastboot devices the result is empty pleace help me.

Muito obrigado!
I know this must seem odd, being such an old thread and all but, after several years adding apps and changing ROMs on my wife's TF300T (my gift!) only these past weeks I had the need to search for help, after installing nougatella 7.1, which I did with success, only to stumble on endless logo loops and loading processes without conclusion. Don't get me wrong, the ROM looks great and it wasn't that hard to install but, after two weeks or so, gave me this problem and after correcting it and installing again the ROM, I got in trouble again...
After some five hours googling and trying different stuff, I finally found this thread and twenty minutes ago (around 2:AM) my ASUS returned to its (Jellybean) life!
Alexhosu, thank you so very much for such a detailed, yet easy to follow guide and, if you happen to come to Portugal on vacation and visit Setúbal, I'll have a bottle of Moscatel waiting for you!
Many thanks to Droidbound (who got me off the hook the first time the tablet went nuts!), and also Kevinthefixer, Gtanner00 and some other very inteligent, patient and thoughtful people, and all the guys who shared their difficulties and in a way helped me find the people with the fix.
For anyone interested in trying this method, I would say that it's paramount that you should stick exactly with what is asked and should pay real atention to what is the correct ROM update to download and use. If anyone needs help with translation to Portuguese, just say so.
Again, thank you so much for this!
JMonteiro

alexhosu said:
This is how i fix my TF300TG stuck on recovery. I hope the steps descried below will help.
if none of the above work try this:
in adb window type: adb reboot
wait until the tablet enter in recovery menu and type in adb window:
adb shell dd if=/dev/zero of=/dev/block/mmcblk0p3
adb reboot bootloader
5. Flasing the blob
Click to expand...
Click to collapse
Thanks for your help :good: and I'm sorry for my basic English, but here is another tablet saved. Your instructions were clear and my tablet is working.
I hope this information helps, based in the next link (user sszyman): https://forum.xda-developers.com/showthread.php?t=2275035&page=9
in which he recommends using the following commands too:
adb shell dd if=/dev/zero of=/dev/block/mmcblk0p2
adb shell dd if=/dev/zero of=/dev/block/mmcblk0p8
adb shell dd if=/dev/zero of=/dev/block/mmcblk0p1
With these commands and "adb shell dd if=/dev/zero of=/dev/block/mmcblk0p3" I was able to solve my Bootloop problem.
Honestly I don't know which of the commands worked, I used all several times.

tf300t fastboot vs usb cable

My problem is my tablet is visible in normal mode on my pc. Bootloader 4.2.1, The Device is unlocked ok. adb devices: #serie ok, and adb reboot-bootloader function works. The tablet will reboot into fastboot mode, but I am unable to find a driver that works on my pc. I installed 1.97 pc asus sync, google sdk, minimal adb fasboot driver, all indicates error code 10
"fastboot devices" does not work. Rck is on and the icon does not flashes, the fastboot reboot feature is '' Waiting for device ". So if I disconnect and reconnect the USB cable, the tablet will restart on the OS...
Even tried with a live linux cd and still the same problem...
Note my usb cable has been replaced by a generic for my original cable had become unstable.
It can be the cause of my problem. Of course I tested with 2 cables? Factory reset and unlocke with v7 and v8 apk, and also an OEM recovery to latest firmware 10.6.1.27.5-20130902
I would like to set up a recovery to try others Roms,
Thanks for your help.

cyborg3691 said:
I would like to set up a recovery to try others Roms,
Click to expand...
Click to collapse
First of all, your boot loader must end with 27.5. Check it out when you are unsure before you do anything more.
Then try to flash Kang TWRP from your SD Card with Terminal Emulator using the following code:
dd if=/sdcard/ twrp_tf300t_kang_2.8.7.2.img of=/dev/block/mmcblk0p4
For more information have a look at Josh’s thread http://forum.xda-developers.com/transformer-tf300t/development/recovery-twrp-t3046479

For this soluce the tablet need to be root...
I have make this but not working, the terminal not see the file on sd card....
On terminal i see
[email protected]:/ $ su
[email protected]:/ # dd if=/sdcard/foo.img of=/dev/block/mmcblk0p4
/sdcard/foo.img cannot open for read: no such file or directory
1 [email protected]:/ #
help me

SOLUCE With another computer...
My problem was my computer z87 motherboard with incompatible usb port? I try front and rear usb ports,
with a generic usb cable, I have solutioned this problem, with a other old computer and minimal adb fastboot v. 1.3.1 with a netbook msi wind u100 runing xp and now, tf300t was detected in adb and fastboot mode the command devices works fine. I intall twrp and intall and try another rom.
Thanks for your help.