Nexus 7 2012 - black screen - HELP - Nexus 7 Q&A, Help & Troubleshooting

My nexus is dead. The tablet has hung up. Restart did not help. After turning on the Nexus Tool Kit and trying to upload a clean system - ended with errors. I tried to format the userdata and re-mount and install roms. However, it did not happen. The tablet does not start. Recovery / bootloader does not work. Powe + volum combo does not work. Black screen. After connecting to a computer - apx device only.
Did I break the bootloader?
Can I fix it? What tools do I need?

Same problem here.
This situation happend with me:
I make a hard reset for tab. And on loading stuck at loading apps 76 / 120 and i shutdown my tab and reboot but not showing screens. Recovery, bootloader and other things not worked.

Related

[Q] Wont boot after failed .zip flash

Hi all,
I have an issue with my D802 int LG G2.
I attempted to flash the 4.4 update from this thread via CMW recovery however part way through the install, the phone turned off and tried to restart.
As a result, the phone now only shows the LG logo and the LED changes colour constantly.
I cannot seem to get it to boot into a recovery mode, nor download mode..
Any ideas? I've had a search around but there doesn't seem to be too much help..
FYI, I can access the 'hard reset' menu by holding Vol - and power twice on boot, but that seems about it.
Looks like i've managed to resolve the problem - Get to the hard reset screen and opt to reset it to then go back to the custom recovery. Simply restoring my old backup worked.

I may have bricked my Nexus 7 and lost my data. Any ideas appreciated

Hello, I fear I have bricked my nexus 7 (2012 wifi unrooted) and lost all of my data
What Happened?
Play store would crash on startup so I went to restart my tablet.
When turning my tablet back on it gets stuck on the four circles loading screen and does not load any further.
What Have I Tried?
Firstly I went into recovery mode and tried "wipe cache partition" as recommended elsewhere. This changed nothing
Then I tried to flash 4.4.3 on in hopes it would replace potential corrupt files (whilst also getting an early update )
I used this guide cultofandroid com/63876/install-android-4-4-3-nexus-5-nexus-4-nexus-7/
It failed. When running flash-all.bat (with -w removed) it would be stuck on "waiting for device" and my tablet would also be idley waiting to receive files.
I thought that my laptop could not 'see' my tablet but think it actually could because I tried restarting my tablet whilst it was plugged in still, and command prompt showed some messages (unfortunately I didn't take note and cannot remember what they said!) whilst it was restarting
State of tablet now
I now cannot even get into recovery mode
When I turn my tablet on the normal way it loads to a screen which shows the "Google" text in the center of the screen, an unlocked padlock at the bottom, and the fastboot options top right (clicking them does nothing)
When I turn on my tablet on into fastboot mode and try to get into reovery mode I get an error message in the top left of the screen saying "Booting failed"
I'm out of ideas.
Is there any way that I can get my tablet back working normally with all my data safe?
Thanks for any and all help/suggestions
Don't go into recovery mode, just leave it in fastboot mode and run the flash-all.bat.
(The -w might be needed, as it reformats your partitions. Yes, all your data goes but if there are faulty sectors, this is the only way)
Thanks, I left out the -w but it completely wiped the tablet anyway. Better than having a brick.
Before I assumed you couldn't flash with out getting into recovery.
For anyone else doing this be patient. The command prompt looks like it has stopped a couple of times but it hasn't. Its only finished when it says 'press any key to exit' (took 4-5 minutes for me).
Also when it reboots your tablet it takes a while and actually reboot mine 2-3 times before it loaded up.

Is my Nexus 4 bricked or irreperably broken?

Hello people,
I have a German Nexus 4 and it gets stuck in bootloop whenever I turn the power on.
I've had issues with the phone since the last few months - i.e. random reboots, random program crashes.
But recently I tried to root it in order to install the Android L developer preview. It was during the booting process, when my Nexus crashed and it has been unable to boot ever since.
When I push all three buttons (power + 2 volume rocker buttons) simultaneously, I get the fastboot screen.
Choosing the following options has these effects:
Start --> phone tries to boot but gets stuck in bootloop forever and ever
Restart bootloader --> restarts the fastboot screen
Recovery mode --> phone shows the robot with an opened belly and a red warning sign (see photograph)*
Power Off --> turns the power off
Also, it is NOT detected or recognized by my Macbook when I connect the Nexus via USB cable. So it's impossible for me to access the phone via my Macbook.
*This is the screen shown when I try to go into Recovery mode in fastboot:
[can't upload outside link to image]
So this leaves me with no options as I never get further than the 4 turning circles forever and ever.
Is my Nexus 4 broken or is there still a chance to unbrick it? (I have a MacBook, so Windows programs won't work for me)
Of course it's not possible to recognize it when OS is not running.
Download WugFresh toolkit, ADB drivers (Universal) and the factory image. Enter fastboot, connect USB and flash the image
Your phone is not hardbricked, because it boots into the bootloader.
It might be recovered if you can access it with fastboot.
Try uninstalling all related drivers and install the Naked Universal Driver.
Thanks for your replies!
Unfortunately, the programs you mentionned don't work on my Mac (they seem to be Windows-only).
Also, how can I install stuff on my Nexus? Since it is not recognized by my MacBook, I can't load any files onto my Nexus.
And since any command on the fastboot screen only leads to the phone powered off, restart of the fastboot screen or the mentionned bootloop, I cannot perform any actions on the Nexus ...
Go to a friend with Windows.
Problem solved!
Somehow after the 1000th bootloop I finally reached the screen where I could wipe the phone.
And then it finally booted! Now all the data are lost and it's like a new phone, but at least it's working again!
How long was the boot loop? Was it the new boot animation from L?
Because when you flash L, the first boot up may take up to 15 minutes, leading you into thinking it's a boot loop.

Stuck in boot loop - soft bricked

My 2012 N7 is stuck in a boot loop. It is stock 4.4.4 and not rooted or bootloader unlocked.
Sometimes it will hang during the boot animation and start over, if it makes it through a complete boot I get about 10 seconds before it reboots again, sometimes a random app will crash before that (usually TV) but not always. That means I can't make any system changes (turn off MTP, usb debugging), or if I can do it quickly the changes don't persist or there isn't time for my PC to update the drivers.
I have tried restoring through the recovery mode multiple times, that didn't take.
I've tried using WugFresh's NRT v1.9.3 to use its "Flash Stock and Unroot" feature and after downloading Google drivers so it can talk to it during fastboot mode I was able to get it to attempt to flash both the 4.4.4 factory image and 5.0 factory image. None of those worked either, I think maybe because I can't get the USB debugging working. The process goes very quickly and spits back various FAILED (remote: Bootloader is locked.) and nothing happens, just sticks at the bootloader screen. Even tried to unlock the bootloader via the NRT in case that would work, got as far as the option to unlock the bootloader and erase everything, that didn't take either.
Every thing I've tried so far just keeps giving me constant reboots with all my apps and data still there. The Android laying there with his chest open is mocking me now and I'm stuck on what to do next. I need help or a point in the right direction, please I am running at my wits end with the blasted thing.

Nexus 7 - Repeating Erasing process

Hi,
Recently, my nexus 7 2012 (wi-fi) has been freezing a lot and I think it is because of the latest lollipop update. I decided to make a factory reset using the recovery mode.
Unfortunately, there was a lot of errors but finally it went to erasing... which took about 25 minutes.
Now, whenever I try to boot up my nexus 7 tablet, it repeats the task to erase everything and I cannot even go into the bootloader via power + volume down.
The only thing I am able to do is to wait for it to finish (about 10-15 min) and then I am seeing the dead android with red exclamation mark.
I can press power button + volume up to access the menu which gives me different kind of options, but whenever I try to remove cache/ data or reboot to recovery mode, it just shows all kind of errrors such as cache not found, unable to mount, and it finally restarts itself and starts the erasing process again.
I was searching for this issue but there was a lot of similarities and could not found the issue with erasing process which repeats itself.
I am looking for any helps as I do not know what I can do in this case .
refresh

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