[Guide] Returning to Stock and/or Unbricking your device Updated for Android 4.3!!!

chris.wueste · Jul 18, 2012

First of all, I am in no way responsible for anything you do to your tablet period.

I have seen a couple of people asking how to return the Nexus 7 to stock after it has been unlocked, rooted and so on, so I figured I would write a quick guide as its super easy to do. Also, please make sure you make a backup of anything you don't want to lose. This is important.

Before you begin, please make sure you have ADB and Fastboot drivers installed and working.

1) Download the factory image for the Nexus 7 at https://dl.google.com/dl/android/aosp/nakasi-jwr66v-factory-d341d356.tgz

2) Extract the factory image into the same directory as your ADB and Fastboot executibles (e.g. "\android-sdk\platform-tools")

3) Plug in your device. If you are booted into Android, open a command prompt to your ADB and Fastboot directory, then type

Code:

adb reboot bootloader

If your device is powered off, press and hold both volume keys and the power button simultaneously. After holding all three buttons for a couple of seconds, your bootloader should launch. This should reboot you into the bootloader.

4) Type

Code:

fastboot flash bootloader bootloader-grouper-4.23.img

5) Next type

Code:

fastboot reboot-bootloader

6) Now type

Code:

fastboot -w update image-nakasi-jwr66v.zip

7) Optional: If you would like to relock your bootloader for warranty or security purpouses, make sure you are in your bootloader screen again and type

Code:

fastboot oem lock

8) If your tablet hasn't already rebooted automatically, type

Code:

fastboot reboot

That should do it. You should now be on stock Android 4.3 and ready to send in your tablet for warranty purposes if you so desire.

Additionally, here is an instructional video courtesy of XDA user SladeNoctis.

Also, thank you to XDA user Shano56 for the formatting help on this post.

SladeNoctis · Jul 18, 2012

chris.wueste said:
First of all, I am in no way responsible for anything you do to your tablet period.

I have seen a couple of people asking how to return the Nexus 7 to stock after it has been unlocked, rooted and so on, so I figured I would write a quick guide as its super easy to do. Also, please make sure you make a backup of anything you don't want to lose. This is important.

1) Make sure you have your ADB and Fastboot drivers installed and working.

2) Download the factory image for the Nexus 7 here

3) Unzip the factory image into the same directory as your Adb and Fastboot drivers.

4) Plug in your device. With the device on the home screen, type "ADB reboot bootloader" or if your device is off, press and hold both volume keys and press the power button. After holding all three buttons for a couple of seconds, your bootloader should launch.

5) This should reboot you into the bootloader. Now type "fastboot flash bootloader bootloader-grouper-3.34.img"

6) Next type "fastboot reboot-bootloader"

7) Now type "fastboot -w update image-nakasi-jrn84d.zip"

8) Optional: If you would like to relock your bootloader for warranty purposes, make sure you are in your bootloader screen again and type "fastboot oem lock"

9) I don't remember if the tablet automatically reboots at this point but if it doesn't just type "fastboot reboot"

That should do it. You should now be on stock Android 4.1 and ready to send in your tablet for warranty purposes.

Additionally, here is an instructional video courtesy of XDA user SladeNoctis.

You should change the title to [Guide] How to return to Stock / Unbrick your Nexus 7

Helps out those getting bootloops or softbricks from geting root access in certain ways or messing with the build.prop

chris.wueste · Jul 18, 2012

SladeNoctis said:
You should change the title to [Guide] How to return to Stock / Unbrick your Nexus 7

Helps out those getting bootloops or softbricks from geting root access in certain ways or messing with the build.prop

Not a bad idea. Done and done. Also, I have proofread it several times over to ensure it is correct but would you mind making sure that all of the commands were typed correctly. My eyes are going crosseyed over here.

Shano56 · Jul 18, 2012

Nice guide man, I changed the format a little to make it easier to read. Use it if you want, won't be offended if you don't.

If you want to use it and are too lazy to quote my post

- http://pastie.org/pastes/4279753/text

The commands look good to me however I've never used "fastboot -w update" so can't say for that

chris.wueste · Jul 18, 2012

Shano56 said:
Nice guide man, I changed the format a little to make it easier to read. Use it if you want, won't be offended if you don't.

First of all, I am in no way responsible for anything you do to your tablet period.

I have seen a couple of people asking how to return the Nexus 7 to stock after it has been unlocked, rooted and so on, so I figured I would write a quick guide as its super easy to do. Also, please make sure you make a backup of anything you don't want to lose. This is important.

Before you begin, please make sure you have ADB and Fastboot drivers installed and working.

1) Download the factory image for the Nexus 7 here

2) Extract the factory image into the same directory as your ADB and Fastboot executibles (e.g. "\android-sdk\platform-tools")

3) Plug in your device. If you are booted into Android, open a command prompt to your ADB and Fastboot directory, then type

Code:

adb reboot bootloader

If your device is powered off, press and hold both volume keys and the power button simultaneously. After holding all three buttons for a couple of seconds, your bootloader should launch. This should reboot you into the bootloader.

4) Type

Code:

fastboot flash bootloader bootloader-grouper-3.34.img

5) Next type

Code:

fastboot reboot-bootloader

6) Now type

Code:

fastboot -w update image-nakasi-jrn84d.zip

7) Optional: If you would like to relock your bootloader for warranty or security purpouses, make sure you are in your bootloader screen again and type

Code:

fastboot oem lock

8) If your tablet hasn't already rebooted automatically, type

Code:

fastboot reboot

That should do it. You should now be on stock Android 4.1 and ready to send in your tablet for warranty purposes if you so desire.

Additionally, here is an instructional video courtesy of XDA user SladeNoctis.

If you want to use it and are too lazy to quote my post - http://pastie.org/pastes/4279753/text

The commands look good to me however I've never used "fastboot -w update" so can't say for that

I updated the OP with your edits in it. Thanks for the help. I quoted you at the bottom

jarjar124 · Jul 18, 2012

omg thank you so much. u saved my device

chris.wueste · Jul 19, 2012

jarjar124 said:
omg thank you so much. u saved my device

Very welcome

chrisjm00 · Jul 19, 2012

Assuming you have a nandroid, can you boot into the bootloader, and simply ADB reboot recovery? Or does that bug prevent you from even doing that?

SladeNoctis · Jul 19, 2012

chrisjm00 said:
Assuming you have a nandroid, can you boot into the bootloader, and simply ADB reboot recovery? Or does that bug prevent you from even doing that?

In some cases due to the CWM not being official it cause bootloops by going to recovery in the bootloader.

Shano56 · Jul 19, 2012

SladeNoctis said:
In some cases due to the CWM not being official it cause bootloops by going to recovery in the bootloader.

There's a CWM official out?

Sent from my Nexus 7 using Tapatalk 2

chris.wueste · Jul 19, 2012

chrisjm00 said:
Assuming you have a nandroid, can you boot into the bootloader, and simply ADB reboot recovery? Or does that bug prevent you from even doing that?

Assuming you have already flashed CWM, then the command would actually be fastboot reboot recovery. Not sure what but you speak of.

chris.wueste · Jul 19, 2012

Shano56 said:
There's a CWM official out?

Sent from my Nexus 7 using Tapatalk 2

Yes. There sure is. If you have Rom Manager installed it can be flashed directly from there.

nicknowsky · Jul 20, 2012

I dont think you can really hard brick this device anyways

kimbernator · Jul 20, 2012

I'm sitting here at the command prompt with it on "erasing userdata"

It's been a couple minutes and I'm freakin' out! How long is it supposed to take? Everything flashed correctly, if I start the device now will there be an issue?

EDIT: Nevermind, just rebooted from the bootloader in the tablet and it booted fine. I'll get the OTA to 4.1.1 and that should probably fix any outstanding little issues.

nugalonious · Jul 20, 2012

hard brick?

I am stuck at the Google logo with a padlock and I'm pretty sure I have a hard bricked tablet. fastboot doesn't see the tablet or my computer for that mater through dmesg.

I've rebooted it countless times with vol + and vol - pushed and any combo thereof. It will only turn off completely when the battery dies because holding down the power key for 10 secs just reboots it back to the Google logo in about 5 seconds. I guess at this point I'm just waiting for Google to give me a RMA for a refund and I'll move on unless someone has any other ideas?

Nexus Phreak · Jul 20, 2012

chris.wueste said:
If your device is powered off, press and hold both volume keys and the power button simultaneously. After holding all three buttons for a couple of seconds, your bootloader should launch. This should reboot you into the bootloader.

Pressing and holding the Volume down + Power buttons works just fine to launch the bootloader (at least for me).

No need to press (and force) the entire volume rocker button at all.

caanda45 · Jul 20, 2012

nugalonious said:
I am stuck at the Google logo with a padlock and I'm pretty sure I have a hard bricked tablet. fastboot doesn't see the tablet or my computer for that mater through dmesg.

I've rebooted it countless times with vol + and vol - pushed and any combo thereof. It will only turn off completely when the battery dies because holding down the power key for 10 secs just reboots it back to the Google logo in about 5 seconds. I guess at this point I'm just waiting for Google to give me a RMA for a refund and I'll move on unless someone has any other ideas?

Try and press and hold just the power button for 30 seconds or so to re-boot the tablet and you should be fine and it should boot up just fine. From fastboot you cannot go into cwm recovery because of a bug.

yeahthatsme · Jul 20, 2012

I'm trying to return to stock but get this message in the window from the ADB command after flashing the stock ROM:

FAILED (remote: (FileWriteFailed))

Anyone seen that before or have any ideas to fix?

I tried wiping cache/factory reset from CMW but no joy.

Kas206 · Jul 20, 2012

Thanks. Worked for me. I did get worried when i got (data transfer failure (too many links)) error when trying to flash the bootloader.

Turns out it was the USB port. I switched the ports and all was well.

But I followed the commands in side the flash-all.sh file

fastboot erase boot
fastboot erase cache
fastboot erase recovery
fastboot erase system
fastboot erase userdata
fastboot flash bootloader bootloader-grouper-3.34.img
fastboot reboot-bootloader
fastboot -w update image-nakasi-jrn84d.zip

---------- Post added at 02:16 PM ---------- Previous post was at 02:13 PM ----------

yeahthatsme said:
I'm trying to return to stock but get this message in the window from the ADB command after flashing the stock ROM:

FAILED (remote: (FileWriteFailed))

Anyone seen that before or have any ideas to fix?

I tried wiping cache/factory reset from CMW but no joy.

Try the commands i posted above and see what happens

yeahthatsme · Jul 20, 2012

Nuts. I tried it on many USB ports and did your commands one by one. Ended up in the same spot. It happens when writing 'userdata'...

[Guide] Returning to Stock and/or Unbricking your device Updated for Android 4.3!!!

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