yashsingh1/xdaforums huggingface dataset:
[Nexus 7 Q&A, Help & Troubleshooting] Ariznottle:
Why can't we just run the flash-all.bat/sh script? Won't it make the restoration process easier? Or is it still better to manually type and enter the commands?
[Nexus 7 Q&A, Help & Troubleshooting] juohmaru:
Following the OP instructions can i downgrade from 5.0 to 4.4.4?

Everything is stock atm..
[Nexus 7 Q&A, Help & Troubleshooting] xolanir:
You can do that, and the process is a little simpler.
[Nexus 7 Q&A, Help & Troubleshooting] darrennie:
downgrade from 5.0 to 4.4.4

Yes, it worked fine for me. :good:
[Nexus 7 Q&A, Help & Troubleshooting] Nashika:
Cant go Recovery Menu

Can't go to Recovery Menu

Tried to reset device in Recovery Mode using these steps:

If your tablet is on, turn it off.

1,Press & hold the Volume Down button, then press & hold the Power button simultaneously until the tablet turns on. You'll see the word "Start" with an arrow drawn around it.

2,Press the Volume Down button twice to highlight Recovery mode.

3,Press the Power button to start Recovery mode. You'll see an image of an Android robot with a red exclamation mark and the words "No command."

While holding down the Power button, press the Volume Up button.

4,Use the volume buttons to scroll to "wipe data/factory reset," then press the Power button to select it.

Scroll down to "Yes - erase all user data," then press the Power button to select it.

Points #1-#3 go well, but I can't pass through #4, after pressing the Power button to start Recovery Mode there is 'image of an Android robot with a red exclamation mark', tablet just goes off if I hold the Power button and the Volume Up button too long.

What should i do? I wanna install tha android 5.0 without lost my warrancy.

Device: nexus 2012 wifi
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
[MENTION=6243166]Nashika[/MENTION] you can operate exactly as in the OP

tetakpatalked from Nexus 7 flo
[Nexus 7 Q&A, Help & Troubleshooting] Nashika:
Sorry but I dont know what does it mean...
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
OP = opening post...the first one in this thread ;)

tetakpatalked from the legendary i9000
[Nexus 7 Q&A, Help & Troubleshooting] Nashika:
Ohh, thanks. If I dont wanna another bootloader can I skip that stage, and countinue after that? So is it enough if I install the new 5.0 lollipo zip? Will' my warrancy lost if i unlocked the oem lock then after it i locked it?
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
Without proper bootloader, factory image won't even install- AMAIK it will interrupt with error. So updating bootloader is a must.

Nexus devices have no oem unlock counter. As soon as you are on stock and have locked bootloader, you're clean.

tetakpatalked from Nexus 7 flo
[Nexus 7 Q&A, Help & Troubleshooting] twigster:
Stock image wont flash

Ive gone and gotten myself into a particularly nasty problem by the looks and am hoping someone can provide some assistance.

I was on Lollipop 5.0 and rooted my device as I wanted to try slimlp F2FS. Ive used F2FS roms before so didnt think much about it and did the wipes in the recovery and file type changes required.

I did also wipe dalvic cache which im not sure whether I was supposed to.

When I tried installing the rom it didnt take and stupidly I wiped my backup when doing the partition changes.

After a number of unsuccessful attempts, including trying to install a previous version of the rom i decided to just go back to stock and try again.

Thats where the problem really started. I use Wugs toolkit and when I try to install it says its failed after each installation section, boot, system, data, etc

The error is that there is no such device or address, this is despite it picking up my device as being fastboot and adb connected.

I effectively cannot do anything. The stock images for lollipop and Kit Kat wont flash and no roms will flash through recovery.

I just tried to flash the stock image again and it just told me it was succesful at erasing the bootloader, boot, cache, recovery and system. I had a bit of a happy moment until it failed through the rest of the process. :(

Im screwed unless someone has any good advice. battery slowly dying.
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
Erased bootloader?? Did someone advice you to do so?

tetakpatalked from N7100
[Nexus 7 Q&A, Help & Troubleshooting] twigster:
No it does this automatically when using the toolkit before reinstalling the stock image.

Believe me I would not have done so myself. I have also tried the manual method using the terminal through fastboot and it didn't work because my PC says fastboot has a problem and it force closes, which is odd because fastboot works every other time.
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
There is some error in the connection, do you have some friend who is Linux user? Linux needs no drivers and it is more reliable for flashing job.

tetakpatalked from N7100
[Nexus 7 Q&A, Help & Troubleshooting] twigster:
I've just downloaded the latest Ubuntu. I'll try that.

Actually had some success yesterday when it allowed me to manually flash the jellybean stock Google image through bootloader using fastboot and booted that, but wouldn't update. Kept giving errors.

Not satisfied (call me an idiot, I'll understand) I tried again to use fastboot to flash the latest lollipop but it fails sending image to phone everytime saying error, too many links or unknown error. This can be either quick or take ages before it shows me the error message.

I'm pretty sure the partitions have an issue but don't know how to check or fix.
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
Check my little guide for how to install fastboot on Ubuntu. Did you erase all userdata, system and cache before install attrmpt?

tetakpatalked from Nexus 7 flo
[Nexus 7 Q&A, Help & Troubleshooting] twigster:
Thanks I'll look at your guide when I get a chance. I'm away from my PC and possibly won't be able to try again today though.

I did wipe but I'll try again. Yesterday it seemed to take on the jellybean image when I'd left it for a while. Not sure why. Im holding thumbs.

Also saw the xda article that 5.0.2 is available so thought I'd go straight to that if possible.

Edit: got it working. Not sure why but had a quick chance to try it again on my standard windows work laptop that ive been using all along. Tried the usual wipe and then flash using command prompt and it took first time. Not 5.0.2 but 5.0 because I hadn't managed to download 5.0.2 yet, but grateful to have it up and running again.
[Nexus 7 Q&A, Help & Troubleshooting] dimedropper:
I think my Nexus 7 is dead.

I was doing a manual update to 5.0 and everything it waz boot looping. Tried to do the exact same steps but it did not work. All of a sudden I can no longer get into boot (or bootloop). All I see is the Fastboot mode (which some say is good). When I try going to Recovery from Fastboot mode I get a Booting Failed error.

So I try the Nexus Root Tool kit but even that seems to not work. Having problems with drivers and other stuff as well.

Whatto do next?
[Nexus 7 Q&A, Help & Troubleshooting] :
Have you tried flashing 4.4.4 again using this guide? Following instructions step by step.

It will at least get you running again.
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
Don't worry, [MENTION=257526]dimedropper[/MENTION], your Nexus 7 will be fine as long as your bootloader is fine. You must fix your drivers, or use Linux PC to flash it, it needs no drivers. Forget toolkits.

tetakpatalked from Nexus 7 flo
[Nexus 7 Q&A, Help & Troubleshooting] dimedropper:
I was actually using a Mac when I was doing the update (no drivers needed). Then everything went wrong. I tried using the Tool Kit hoping it will help fix it. Any tutorial on how to get the tablet working again using a Mac?
[Nexus 7 Q&A, Help & Troubleshooting] dimedropper:
[MENTION=4036181]Darth[/MENTION] - Yup, tried it as well but nothing is happening. I tried doing a complete restore to stock, downloaded the factory image via toolkit and it tried installing but it did not work as well. I'll give it another go.
[Nexus 7 Q&A, Help & Troubleshooting] gogonelos:
nexus 7(2012 wifi)

Hello,

I updated my tablet to android 5.0 via automatic update from google when it appeared a month or some ago. Since then it's a complete mess:running very slowly, restarting takimg ages. Almost a damn brick, can't use it for nothing.

i wanna flash a new image on it but not sure if the steps in this guide will help

i must say i only flashed a samsung phone before using odin and that's pretty much it.

Any answer will be highly appreciated!
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
[MENTION=257526]dimedropper[/MENTION] regrettably, I have no experience with Mac. But knowing how Android devices are done, I am pretty sure that once you flash stock image correctly, the Nexus 7 will be working again. I am Linux (Ubuntu) and WinXP user and flashing job was very easy with either of those OS. Windows, however always needs perfectly correct working drivers to be useful.

[MENTION=6273463]gogonelos[/MENTION] yes, this guide should be helpful. It was done in the time of Android JB4.3 but proceeding is up to date- it is the same process for any stock image. The red text about bootloader regards only proceeding with JB4.3, if you use 4.4 firmware its stock image supposely contains another, updated bootloader.

Just be absolutely sure to download the firmware exactly for your type/model.

tetakpatalked from P5110
[Nexus 7 Q&A, Help & Troubleshooting] dimedropper:
Trying desperately on a Windows PC now. I installed the drivers via SDK Manager but the PC still doesn't recognize the tablet when plugged. If I can only get to the Fasboot Mode it should still be recognized by the PC right? Coz I can't turn on USB Debugging since I can't get past Fastboot. Tried a couple of times to uninstall any drivers and re-install. Used both the Toolkit and SDK process but to no avail tablet is not recognized. I think that is also why I can't do any fastboot command (no device listed when I run fastboot devices) drivers are not installed properly.

When running SDK Manager I have SDK Tools, SDK Platform-Tools and SDK Build-Tools installed. Then Google USB Driver. Anything else that I need to install aside from those?
[Nexus 7 Q&A, Help & Troubleshooting] gogonelos:
I use 5.0 now and will try to flash 4.4. Hopefully i will find the right firmware
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
Correct, entering command "fastboot devices" should return serial no and "fastboot" right after. Try different USB port (preferably not USB 3.0) or also different cable.

Enabling USB debugging is not necessary to use fastboot, however, I am not sure if the device needs to be connected once with running OS to be installed. Maybe [MENTION=4194102]comminus[/MENTION] knows that detail?

If nothing helps, I would try to run in that Windows PC Ubuntu as Live CD, option "test Ubuntu" (doesn't need to be installed). Then just set the permissions on the desktop to "write and read", fastboot should be very easy to install, check my little guide for running option fastboot only on Ubuntu. Don't worry, mate- you will make it. Just have always patience :)

tetakpatalked from Nexus 7 flo
[Nexus 7 Q&A, Help & Troubleshooting] hackdelight:
help

i had nexus 7 2013 4.4.4 kitkat version, to flash new android 5.0.2 I format the system from twrp and OS deleted.

then i tried to install android 5.0.2 factory image but when i tried to install bootloader via fastboot toolkit, it gave me an error that SIGNATURE MISMATCHED, I also unlocked the bootloader. I tried skipsoft toolkit but it also gave me the same error.

how am i able to flash new bootloader? can anybody help me? :confused::confused:

Im using windows xp 32 bit system, i installed wmp 11 and mtp 12. my device can be detected by both fastboot and adb
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
You are talking about "razor", either "deb" or "flo" variant and this guide is for older model of Nexus 7 (2012) "nakasi" or "nakasig" so make sure you have tried to install proper firmware.

tetakpatalked from Nexus 7 flo
[Nexus 7 Q&A, Help & Troubleshooting] veener79:
I am running Windows 8.1. The drivers listed are not for that version of Windows. I have my Nexus 7 attached to my PC and I did try and type in adb devices. It did not list any devices. I can only get my Nexus 7 into TWRP. It will not boot into Android. That is what I have it in when trying "adb devices" Thanks for your help.

Also noticed I did not have this as a option to install

8 Under Extras, check the box labeled "Google USB Driver"
[Nexus 7 Q&A, Help & Troubleshooting] Uncleheff:
I am having similar problem. Nexus 7 (2012) will only boot to boot loader and laptop running 8.1 will not recognize nexus. Long story short....this is a new laptop. Last one crashed in the middle of trying to return my nexus to stock. Now there's no recovery or boot.img
[Nexus 7 Q&A, Help & Troubleshooting] Mista513:
Is there a guide to do this on the N7 2013 FHD wifi only model? Or can I follow the same steps using the factory image for 5.0 from Google and the SDK. I tried using Wugs v1.99 and when I try to unlock the tablet just sits there after choosing the unlock option with the power button. I keep getting msgs about adb not responding and to make sure I have usb debugging enabled. I had the 5.0 OTA for about a month and all was fine till yesterday, I woke up to a Google logo and can get to fastboot and it shows my device serial in Wugs but I can't get to recovery, it goes back to the Google screen. Sorry I forgot to include that I'm not sure if USB debugging is enabled or not since I can't get the tablet to boot. ?
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
Yes, it will work the same way for N7 flo. The proceeding is identic for all Nexus devices, AMAIK.

Consider to flash latest KitKat factory image, as Lollipop seems to be an early birth in many terms. Many people seem to face your issue after update.

tetakpatalked from Nexus 7 flo
[Nexus 7 Q&A, Help & Troubleshooting] Mista513:
I've been trying all day, unlocking using fastboot oem unlock or via Wugs always just hangs at erasing userdata and the tablet never changes from the screen where I select yes to unlock.
[Nexus 7 Q&A, Help & Troubleshooting] Uncleheff:
Thanks for this tutorial. You saved my nexus 7 (2012)
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
Annoying....try another USB port, or cable, void USB 3.0 for this. I really hope you will find the way out, mate :(

tetakpatalked from N7100
[Nexus 7 Q&A, Help & Troubleshooting] Elek93:
Messed up n7

I used to mess around with my nexus 7 a lot. I possibly changed and flashed everything I could, I rooted it multiple times, failed a lot and in the end my tablet is basically unusable. It takes forever to wake up from sleep and for few minutes after turning screen on everything is very unresponsive. It look like I flashed some battery saving kernel. Yesterday I grabbed my nexus and updated it through ota to 5.0.2, and I did factory reset but problem is still here. Any idea how to unroot, flash stock room, radio, kernel and bring everything to stock? I really don't remember which stuff I flashed as It was sitting in my drawer unused for over year so I'm looking for permanent solution to bring my tab to usable state. I also have two different versions of supersu installed and they stay on even after factory reset.

I'm not sure if it's important but I own UK version of n7, 16gb, wifi only and it's first batch
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
That's exactly what the opening post was created for ;)

tetakpatalked from Nexus 7 flo
[Nexus 7 Q&A, Help & Troubleshooting] veener79:
Every time I get to the last step "fastboot -w update image-nakasi-jwr66y.zip" I get the error that fastboot is not responding and window closes it. All the other commands are working fine.
[Nexus 7 Q&A, Help & Troubleshooting] Androgoo:
Hey which method did u use to fix nexus 7
[Nexus 7 Q&A, Help & Troubleshooting] Uncleheff:
I used this threads step by step instructions. My biggest difficulty was getting my windows 8.1 laptop to "see" my nexus. I had to.....

1. Boot my nexus 7 (2012) into bootloader (volume down and power button simultaneously)

2. Plug it into my laptop and allow windows 8.1 to try to install drivers

3. Go to device manager on laptop and right click android device

4. Click update drivers

5. Select appropriate drivers from previously downloaded file here http://support.asus.com/Download.aspx?SLanguage=en&m=Nexus 7&p=28&s=2

6. Then follow steps on page one of this thread.
[Nexus 7 Q&A, Help & Troubleshooting] veener79:
OK found the fix. It was the bootloader. I had to get the bootloader from the factory image for version 4.4. The 5.0.2 bootloader would not work for me.

This is what helped me

http://xdaforums.com/showpost.php?p=56734904&postcount=39

thought I would post this for an update.

I am not sure how many hours I put getting this tablet back up and going but just glad it is.
[Nexus 7 Q&A, Help & Troubleshooting] vossman:
I know this is an old (ish) thread but I have just found my old N7 out as it was being used as a table mat . . . . . . !

Followed the guides on here and now have a nice new sharp N7, seems a shame to take it back under warranty now.

Thank you very much for the guides :good:
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
The thread is up to date. You can use it for the newer images just the same way.

Bootloaders of the image versions 4.4 or higher are OK

tetakpatalked from Nexus 7 flo
[Nexus 7 Q&A, Help & Troubleshooting] vossman:
Yes, I didn't mean the thread was outdated, just that it was started a long time ago, I did not make myself very clear.
[Nexus 7 Q&A, Help & Troubleshooting] fvisagie:
Just a word of caution to others, perhaps you're referring to the Nexus 7 Wi-Fi. I found that the 4.4.4 factory image for Nexus 7 3G contains the corrupt bootloader too. The Nexus 7 3G 5.0.2 factory image also contains it, as you report.
[Nexus 7 Q&A, Help & Troubleshooting] josebarao:
I followed all the steps over and over again, but every first time i reboot after flashing the image-nakasig-lrx22g.zip, the n7 3g (2012) is stucking on the bootloop, showing the logo of the stock recovery... I tried to press power+vol up, and every combinations i know, the only way to proceed is to press the power button for 10 sec's. Every time i turn on the n7 it shows the google logo, after it disapears the stock recovery logo appears for 0.5 sec's and then it boots normally. But i noticed that there is no recovery what so ever. Is there any solution??
[Nexus 7 Q&A, Help & Troubleshooting] himanshu_1996:
Please Help

I Was Trying To Get My Nexus 7 Wifi Version Back To 4.4 from 5.0.2

i followed the mentioned steps

> fastboot erase boot

> fastboot erase cache

> fastboot erase recovery

> fastboot erase system

> fastboot erase userdata

> fastboot flash bootloader bootloader-grouper-4.23.img

> fastboot reboot-bootloader

> fastboot -w update image-nakasi-jwr66y.zip

it stopped at sending system and fastboot stopped responding

now my nexus 7 is not powering on nothing is showing on the screen

please can anybody help me
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
Try it again mate. As long as the bootloader is fine, your N7 will be fine again.

tetakpatalked from N7100
[Nexus 7 Q&A, Help & Troubleshooting] himanshu_1996:
Not Powering On
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
Do you own Nexus 7 first model 2012 and did you flash on it JWR66V (not Y) booloader?

(Please read careful every letter)

tetakpatalked from Nexus 7 flo
[Nexus 7 Q&A, Help & Troubleshooting] fvisagie:
The nakasig LRX22G factory image bootloader is (also) corrupt. You could try flashing again after replacing the bootloader with the one from the first post. Press and hold [Vol-] + [Power] to reboot into fastboot (not [Vol+] + [Power] which opens up the stock recovery mode menu).

---------- Post added at 10:13 ---------- Previous post was at 10:01 ----------

You can try the Nexus Help trouble-shooting steps for this problem. You can search for more trouble-shooting hints, but these are the official Google ones and at the end put you in contact with their support people if nothing worked.
[Nexus 7 Q&A, Help & Troubleshooting] Zeffamyne:
THANK YOU!

After upgrading to lollipop on my original Google Nexus 7 I have been pulling my hair out. It was slower than slow. My most beloved device became an instrument of torture. Although I was desperate to make the return to kit kat, I was reluctant to flash the ROM, having never done it before. On my first try I consider this a raging success. Both myself and my Google nexus thank you from the bottom of our hearts!
[Nexus 7 Q&A, Help & Troubleshooting] himanshu_1996:
i own a nexus 7 2012 (wifi Version) and i flashed android 4.1.2 (JZO54K) bootloader

my device is not powering on no matter what i try

please help me :(:(
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
I hope it is only your battery left without juice. Try to connect it on AC adapter for several hours and then try again with power and vol(-) buttons.

tetakpatalked from A0001-OPO
[Nexus 7 Q&A, Help & Troubleshooting] mrakkas:
try newest ver NRT
[Nexus 7 Q&A, Help & Troubleshooting] himanshu_1996:
tried

tried it but nothing happened my nexus is not powering on what to do
[Nexus 7 Q&A, Help & Troubleshooting] gogol:
How do I go back to stock if I am using all-f2fs ROM?

I think I must first go back to etx4 file system, but how?

Thanks.
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
Usually new install should format everything back to ext4. You can also do it same way back, probably with custom recovery that features toggleable formatting option F2FS/ext4

tetakpatalked from Nexus 7 flo
[Nexus 7 Q&A, Help & Troubleshooting] gogol:
What do you mean with "new install"? Is it installing the ROM itself?

So, if I flash CM 10.2, the recovery (TWRP) will do the formatting itself automatically detecting and formatting to ext4?

That would be easy :)
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
It depends: if there is an install script that includes formatting of /system, yes- it will reformat then back to ext4

But you have done formatting to F2FS yourself, right? You can manually go back nearly the same way, just checking the "ext4" option.

tetakpatalked from N7100
[Nexus 7 Q&A, Help & Troubleshooting] genericfu:
[MENTION=4194102]comminus[/MENTION] It appears Google finally fixed the bootloader in the factory images for 4.43+ in case you want to update your instructions.
[Nexus 7 Q&A, Help & Troubleshooting] waingro808:
omg, halfway through the process, the fastboot commands started failing. I changed USB cord and port, and it started working again. Phew!!! :eek:
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
Right, but they didn't fix it for JB 4.3 which wan an objective of the thread.

tetakpatalked from Nexus 7 flo
[Nexus 7 Q&A, Help & Troubleshooting] genericfu:
Good point, I missed that the note was specific to the 4.3 image. That said, most people are probably flashing a KK or higher image at this point.
[Nexus 7 Q&A, Help & Troubleshooting] genericfu:
Tried flashing boot.img from the 5.1 nakasi image and still get the same InvalidState error. Maybe they didn't fix it?
[Nexus 7 Q&A, Help & Troubleshooting] cptsashimi:
I've received that message for every image flash since the one mentioned in the OP.
[Nexus 7 Q&A, Help & Troubleshooting] genericfu:
Manually flashing produced the error, but using the flash-all script seemed to work... <shrug>
[Nexus 7 Q&A, Help & Troubleshooting] napster4345:
Factory Image Restore PLEASE HELP

I was using paranoid android earlier and followed all the steps correctly for Factory Image Restore and flashed the latest lollipop 5.1.1 , however i am stuck at the first reboot and the 4 colored balls (red blue green and yellow ) make an animation but nothing happens further. The phone is not starting. It is fully charged . what should I do now?
[Nexus 7 Q&A, Help & Troubleshooting] tetakpatak:
OK, I found you. Why do you write "phone"? Do you mean Nexus 7 2012 razor/g then?

First boot can take really long time.

tetakpatalked from N7100