[Nexus 7 Q&A, Help & Troubleshooting] 5implelove:
you can follow this guide.

1. Download the 4.1 (JRN84D) image files to your computer. A direct download link is found here: [Only registered users can view links. ]

While a link to the Google page you can search on if you need, is here: [Only registered users can view links. ]

2. Extract the files from that downloaded file. This will give you a folder called "nakasi-jrn84d-factory-8b0bd791"... inside of which you will find a folder called "nakasi-jrn84d"... and inside of that you will see the files we are going to fastboot to your tablet. We want to place these files into the folder we located earlier which contains our "fastboot" file. Move or copy them over to that folder.

Note: On Linux/Ubuntu you may just extract them to any easily located folder.. Create a new one on the desktop or your home folder is my recommendation.

For reference, there should be 4 files, named:

bootloader-grouper-3.34.img

flash-all.sh

flash-base.sh

image-nakasi-jrn84d.zip

3. Open a command prompt inside the folder we have set up our files in. On windows this can be done by holding shift as you right-click in the folder, then select "Open command window here". On Mac or on a Linux system you want to open a terminal/command prompt and navigate to that folder using "cd" or "change directory" commands. For example if your folder is called "fastbootfiles" and it is on your desktop, you would enter:

Code:

cd desktop

Code:

cd fastbootfiles

4. Power down your tablet. Reboot into the bootloader by holding Volume Down + Power until you see the bootloader screen. In red letters toward the top of the text you will see fastboot mode. Once here, plug it into your computer.

5. Let's make sure you have your fastboot drivers installed and recognizing your device. Enter in the command prompt:

Code:

fastboot devices

For Mac:

Code:

./fastboot-mac devices

And press enter. You should see "List of attached devices" Followed by a string of numbers. If you do not see this, you do not have your drivers installed correctly! Go back to Zero Neck's Unlocking guide and grab the correct drivers, and make sure you install them correctly. You can also find the procedure during the video posted by Ragnarokx.

If you got the expected response, let's move on to fastbooting you back to stock...

6. This first command is going to wipe all your old EVERYTHING from the device. Credit to our resident AC cowboy, Jerry Hildenbrand, for pointing out to me a minor bug with the Nexus 7 bootloader that makes this a wise step to do first. Type each of these lines followed by Enter between them, waiting for one to finish before moving on to the next:

Code:

fastboot erase boot

fastboot erase cache

fastboot erase recovery

fastboot erase system

fastboot erase userdata

7. This command will flash the stock bootloader on to your device. Enter:

Code:

fastboot flash bootloader bootloader-grouper-3.34.img

And press enter. Make sure you type the command exactly as you see it.

Note: As we noted earlier, replace "fastboot" above with the exact name of the fastboot file in your folder, for your system, such as "fastboot-windows" or "fastboot-mac". Addtionally for Mac's only, the command should be entered as such

Code:

./fastboot-mac flash bootloader bootloader-grouper-3.34.img

Noting the period and forward slash before the command.

Going forward you Mac folks just remember that with the rest of the commands

Now reboot the bootloader:

Code:

fastboot reboot-bootloader

Enter.

8. This next command will both wipe your old system and flash the factory image in its place, which includes the stock system, recovery, kernel, and userdata partitions:

Code:

fastboot -w update image-nakasi-jrn84d.zip

Enter, and wait, make sure the command finishes. This might take a few minutes.

Reboot the bootloader again:

Code:

fastboot reboot-bootloader

Enter.

9. We are done with the hard part... pretty easy right? Now we're just going to lock that bootloader.

Code:

fastboot oem lock

Enter.

Yes, this step is optional but I strongly recommend it if you had issues earlier which led to this procedure. Now you can unlock again if you like, which will give your tablet that final full wipe to clear out any bad data remaining:

Code:

fastboot oem unlock

Enter.

10. Finally, reboot and setup your tablet again from scratch!

Code:

fastboot reboot