[Q] impossible to restart/boot Nexus 7 - Nexus 7 Q&A, Help & Troubleshooting

Hi there, have a specific problem, tried to google and search through the forum but no success.
I have stock ROM with 4.2.1 android, no root etc., I was browsing web via Firefox, opened 3 pages, battery cca 48% when suddenly everthing freezed, even home button and whole screen become unresponsive. I pressed the Power button for several seconds to turn it off and to restart it, however the screen is off all the time. I have tried to do hard reset, hold the power button for 30-180 seconds, hold all 3 hardware buttons for 30-180 seconds, hold just power and one volume button, connect to PC (always connects as Unknown device, not able to load any driver), tried all of this with and without power supply connected. After all this I am still not able to boot the device. Any idea?

Try unbricking Nexus 7 guide
Hi, you should always be able to get your Nexus 7 back to factory defaults by following one of the many "unbrick nexus 7" guides, like:
http://forum.xda-developers.com/showthread.php?t=1781250
Good luck !

unfortunately I am not able to flash it as my screen is still black, I do not see whether it is on or not, I am also not able to connect it to computer as it still pops up message that the device is unknow and I am not able to install any driver for it, nor automatically, nor google usb drivers... still getting unknown device message...

I'd just return it to Google and get a new one
Sent from my Nexus 7 using Tapatalk HD

harweyko said:
unfortunately I am not able to flash it as my screen is still black, I do not see whether it is on or not, I am also not able to connect it to computer as it still pops up message that the device is unknow and I am not able to install any driver for it, nor automatically, nor google usb drivers... still getting unknown device message...
Click to expand...
Click to collapse
Ouch ! That sounds like a broken device to me. I'd also RMA it.

Have you try plugging your tablet into your charger and check if your device is charging or not? (you'll see a battery status in the center of the screen) if so try to charge it for an hour or so and then after that try to press the ff.
while your tablet is off press and hold both vol. up and vol. down button then press and hold the power button. keep it press for at least 10 secs. and see if you can go/access your fastboot mode..

charged for more than 4 hours, tried that, did not helped, already sent for repair... hopefully will be changed for new one...

Just pry off the back and unplug the battery, ubereasy and will work fine again. Unless you got a lemon
Sent from my Nexus 7 using xda app-developers app

so at the end it was faulty motherboard, so I receveid new device...

Related

Galaxy S black screen

Hi all, I have a galaxy s and was going to install a new rom. I saved the rom to the sd card and pressed the power button to go into recovery mode, the screen went black as usual but never rebooted and the screen stayed black. I connect it to the pc and it tried to load some driver something to do with "test driver" but anyway the screen stays black and the phone does nothing. Any ideas how to fix this without sending back to Samsung. Thanks for any ideas. Wayne.
Does the phone show the samsung logo at the beggining or is it just dead black?
Sent from my GT-I9000 using XDA App
the same problem with me today blank screen, no vibration, no download/recovery mode, anything. The only sign of life is when I connect it to my PC, it detects a new device named SEC S5PC110 Test B/D , request a driver
You should send it back to Samsung. I'm thinking that its more than a software (ROM) problem when even download/recovery mode isn't working.
Same happened to me, try to get your phone back in restore mode with the three button trick. Amd reinstall the image again... it will work..
mine is just black does nothing except request a driver when i connect it to a pc. SEC S5PC110 TEST B/D. thats all it will do.
It is probably the deep sleep coma bug (I've had it ever since I flashed to 2.3.4).
Hold the power button down for 10 seconds and it should reboot the phone.
Remove the battery, leave the phone disconnected from the PC and get the phone in restore mode. Then when that succeedes, connect the phone to the PC.
I heard this problem in other forums when users flash a wrong rom or firmware. Only samsung can repair your device.
Try to access download mode: vole down button + home button + power button if you can access this let me know
Sent from my GT-I9000 using XDA App

Won' t turn on! Tried all suggestions

Yes I have read all posts regarding "Screen Of Death" issue and i have tried all the suggestions. But still, my 10.1 won' t turn on. I have left it drain the bat for 2 days now.
Even if i plug it to the charger there is no sign of battery charging. Hence just blank black screen. any other idea before I have to go to the Service Center. Thanks. Any help would be appreciated.....
Connect the USB to a Windows computer and press Power + Volume Up for 30seconds. Do you hear a Windows "new hardware found" sound?
Thanks... Tried... Still fail. My PC only signaling found new hardware but fail the installation process. I guess because the tab is still not ON. Help....
It seems my PC recognizes the tab but can't find the driver. I can also feel "warm" near the power button area when i connect it to any electricity but still no TURN ON or BATTERY CHARGING INDICATION.
Have you tried to charge it with the wall charger for at least 2hrs and then unplug it and hold powerbutton 10 sec?
Sent from my GT-I9000 using Tapatalk
AndreBrian said:
Thanks... Tried... Still fail. My PC only signaling found new hardware but fail the installation process. I guess because the tab is still not ON. Help....
It seems my PC recognizes the tab but can't find the driver. I can also feel "warm" near the power button area when i connect it to any electricity but still no TURN ON or BATTERY CHARGING INDICATION.
Click to expand...
Click to collapse
Actually, that is what I was expecting as result.
The Power + Volume Up enables the nvflash APX mode, the screen remains totally black. I simply wanted to know if the tablet works and the culprit is just the screen. From what you say, we get the expected results... Windows detects the new hardware so the tablet works.
Now try the opposite: Power + Volume Down, hold it for 30seconds.
If you don't see nothing on the screen, it is probably a screen contact that got lose... you need to service it by Samsung.
yes done that. Still not ON. When I plug it I can feel it is working since I can feel "the warm" but screen still is blank
Then you already know what to do.
No biggie, Samsung will send you a replacement for sure.
yqed said:
Actually, that is what I was expecting as result.
The Power + Volume Up enables the nvflash APX mode, the screen remains totally black. I simply wanted to know if the tablet works and the culprit is just the screen. From what you say, we get the expected results... Windows detects the new hardware so the tablet works.
Now try the opposite: Power + Volume Down, hold it for 30seconds.
If you don't see nothing on the screen, it is probably a screen contact that got lose... you need to service it by Samsung.
Click to expand...
Click to collapse
yes. In fact now the APX is still working trying to find " a new hardware ". Should I cancel it and try the POWER+VOL DOWN now?
Yes, go ahead.
DONE the Power + Volume Down still not ON. BTW the APX Could not find any driver? Is it normal. Before this happens in fact i can transfer any file with my PC through MTP. Thanks again for your help. Hopefully you still know any other solution.... Keep waiting
The APX driver is included into nvflash package, it does not matter if you install it or not at this point. The advantage of this test is that the APX mode keeps the screen off in purpose, while allowing you to flash the tablet through a CMD window (only if you have an unlocked bootloader). We used this trick to determine if the core of your tablet works... we wanted to isolate the problem related to your screen.
I recommend you to contact Samsung and have the tablet serviced. Some screens lose a contact point when you drop the tablet by accident or if a soldering point is weak... The heat generated inside is enough sometimes to sever a lose circuit connection. Either ways, you do NOT want to keep this tablet.
I hope you did not flashed the tablet with some custom ROM, or else Samsung might void your warranty.
OK. Then the only thing i can do is go to SC.......Hmmmmm I am still using stock rom but unfortunately i did root the tab already. Is it bad judgement??? Thanks anyway.
I really hope it is only the screen connection lose issue. But just for curiousity. If only the screen keeps OFF, does it mean I actually can still check that my gtalk on the tab still connects? How this thing works??? since i just check with my phone my gtalk on tab is off.
You ordered the tablet online from Samsung or you bought it from a retailer like Best Buy?
I bought it from retailer. BTW is there any kind of USB JIG for the tab similar to SGSII? I just thought maybe this can help solve the screen of death issue. Ha ha ha ....
Perfect, just go see the store and explain to them nicely the issue. I'm sure they will exchange it for you.
Forget about the JIG or anything else, your screen is gone wacko... What you do now is try to force a blind guy drive a car... Just go exchange the tablet.
Ok I' ll do that. Thanks for your info and help. Hopefully problem will be solved soon.
I had the same issue but I couldn't return to the store so I went through support. They don't have parts yet so they just send you a different unit. In total it took 2.5 weeks for me and I ended up with an unlocked unit
Sent from my LG-P999 using Tapatalk
x-ravin said:
I had the same issue but I couldn't return to the store so I went through support. They don't have parts yet so they just send you a different unit. In total it took 2.5 weeks for me and I ended up with an unlocked unit
Sent from my LG-P999 using Tapatalk
Click to expand...
Click to collapse
Damn, it took 2.5 weeks to get a new unit?
The good news is, it's recoverable. The bad news is, it's going to take a long time.
Keep it off the charger.
Hold down the power button to get it cycling through APX mode while plugged into your PC (can hear the USB connection sound in Windows).
Tape the power switch down, verify it's still going into APX mode after taped, then unplug it.
Leave the tablet alone for a few days. Think about puppies, chocolate, bouncing breasts, whatever makes you happy, and forget about the Tab.
Come back, plug it back into the PC, see if you still hear it connect. If so, walk away again, come back the next day.
When it finally stops going into APX mode, plug it into a wall charger and leave it alone for about an hour, it should start charging normally, and once it's got charge showing, it'll power up normally.
Rule of thumb is it'll take about a full day for every 10% of charge that was on the battery when it went down, if you keep the power button taped down.

Plugged in my N7 while off, and now it's dead.

It is showing a black screen (with backlighting) and sometimes when I plug it in it shows the Google logo. Tried reseting it, and doing everything I have read, but nothing works. If I unplug it, it shuts off and won't boot. Any help?
Try booting into bootloader to reboot device =D
Sent from my Nexus 7 using xda app-developers app
nygfan760 said:
It is showing a black screen (with backlighting) and sometimes when I plug it in it shows the Google logo. Tried reseting it, and doing everything I have read, but nothing works. If I unplug it, it shuts off and won't boot. Any help?
Click to expand...
Click to collapse
Hi, nygfan760...
If you're getting some sort of response, then that's a good sign.
First, just LONG PRESS the POWER-BUTTON (for around 30 seconds); this will force power-down the device and reset it.
Try powering up from there.
-------
If that doesn't work...
...try to enter BOOTLOADER/FASTBOOT mode...
Press both Vol+/- buttons... and HOLD... whilst 'Holding'.., now press the POWER-BUTTON.
You should get the BOOTLOADER SCREEN... with UP and DOWN arrows, adjacent to the volume UP and DOWN keys... with the START option adjacent to the POWER-BUTTON.
Press the POWER-BUTTON... Hopefully you device will START...
Rrgrds,
Ged.
Hi, I also had similar problems with my Nexus 7. I was able to get in bootloader after multiple tries. Kind of randomly... didn't understand why. Unit would finally boot but turn off randomly again.
I gave a try and removed the back of the unit to take a look... I saw that the battery was nearly unplugged. I simply popped the connector in and voila! no more SOD, turning off, nothing.
So, the Nexus was probably turning itself off because there was randomly no more power comming from the battery. (and also could'nt charge it)
Here's a link on how to remove the back shell : http://www.ifixit.com/Teardown/Nexus+7+Teardown/9623/1
Look at Step 4.
None if it worked. Luckily I was still able to return it to office depot. Thanks for the suggestions!
Sent from my LG-E970 using xda app-developers app

Here we go again, bricked Nexus 7 from Asus

Dont know what happened. My Nexus 7 is fully charged, when I plug it into my computer and press the Nexux power button, my computer makes the sound of a USB device showing up. 5 seconds later makes a slightly different sound and tells me my device is not found. I can not see any screen activity at all. I have pressed every combination of buttons trying to get it to do anything. Nothing seems to have any effect.
Has anyone else bumped into this issue? Is there a fix. I dont care if the data on my Android is wiped out, would just like to get it working again. Is there a hardware, "Reset back to factory, ignore everything' type function? Very frustrating having only three non-working buttons.

Nokia 5 suddenly went off no screen no logo vibrates only and shows usb bulk in devic

So my girlfriend's nokia 5 recently suddenly went off and isn't showing any screen or logo when ever i try to turn on it vibrates after every 15 secs while holding power button tried everything nothing works when ever i connect it with pc it shows usb bulk drivers i think its automatically hard bricked just the screen of death no nothing no soft or hard reset no android logo screen nothing at all.. please help kindly
Bring it to wherever you bought it from. They should replace it.
Benderisas said:
Bring it to wherever you bought it from. They should replace it.
Click to expand...
Click to collapse
It was a gift from someone else who bought it in saudi arabia and it does still have have warranty howsoever but no use. Any other way to unbrick?
Huxy14 said:
It was a gift from someone else who bought it in saudi arabia and it does still have have warranty howsoever but no use. Any other way to unbrick?
Click to expand...
Click to collapse
https://nokia.ebuilder.com/
Also you could try holding Power and volume up buttons. Just to see if anything different happens.
Try charging it. Does it charge? Do you see charging icon (if phone is off, it should still show something).
Also google (you should find it in this forum) how to get into recovery. From there - hard reset, bootloader possibilities. But check first if you can get into that.
Benderisas said:
Also you could try holding Power and volume up buttons. Just to see if anything different happens.
Try charging it. Does it charge? Do you see charging icon (if phone is off, it should still show something).
Also google (you should find it in this forum) how to get into recovery. From there - hard reset, bootloader possibilities. But check first if you can get into that.
Click to expand...
Click to collapse
I have tried and checked everything else it doesn't show charging icon and i even tried hard reset recovery soft reset nothing comes at all whenever i connect through usb to pc it shows usb bulk driver in the device manager .
Try Vol-Up + Vol-Down + Power buttons for 30 seconds

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