[Q] Nexus 7 - no display, no boot, nothing - Nexus 7 Q&A, Help & Troubleshooting

I've had my nexus 7 for about 3 weeks now. Was working great until last night. I haven't altered it such as rooting or custom ROM since I bought it. Besides some apps I have installed via the play store, it can be considered very very factory stock.
Battery was low and it started the automatic shut down because the battery level hit the critical point. It shut down and then I plugged it back in and turned it back on. It was halfway through the boot up (showing the multi-colored X) and the screen went blank and I heard what could be a farting sound, then nothing.
I've tried holding down the power button for more than 30 seconds (timing it on my watch) and I've tried the power button and both volume up/down buttons in the same manner. Nothing.
I let it charge overnight on the factory charger with factory cable. No change.
I opened the back up and disconnected the battery for a few minutes then reconnected. No change.
I plugged it into my computer and it detects and I was able to install the drivers for "Asus Transformer Prime APX Interface". If I hold the power button for 10 seconds while it is connected to my PC the PC detects that the device is disconnected and then reconnected about 5 seconds later. So the device does something.
I tried using the android-sdk to communicate with the device but nothing. ADB doesn't detect the device, fastboot doesn't either.
At this point, I'm thinking the device is as hard bricked as can be but hopefully someone here can tell me otherwise. If I don't get a response within a week, I will be attempting to get a replacement - my wife bought it brand new for me from a private seller on eBay, so I don't have an actual store to return it to.

Related

Bell Vogue keeps rebooting

Hi everyone,
I have had some trouble with my Vogue. At first it simply would not turn on. I would get a red light when I plugged the phone in to charge it. I have been using my old phone for several months now. Today I went out to the nearest Bell store and it seems like anything new is going to cost in the $500 area because I still have 1 year left on my contract. So I have renewed my interest in getting my Vogue working again
The original thread describing my original problem (with the red light) is here:
http://forum.xda-developers.com/showthread.php?t=546674
I purchased a new battery and now when I plug it in on the USB I can turn it on (no lights, red, green, or otherwise) but it does turn on. It boots up just passed the blue “Bell” splash screen and then reboots. It does this over and over again.
I am able to get into the boot loader screen by holding down the power and camera buttons and pressing the reset button.
Any ideas on what I can do? Any suggestions are welcome.
Regards,
The Fish
Reflash your rom when you get to the bootloader screen.
If you are unlocked flash nfsfan or whatever, just rename the nbh file to 'VOGUIMG.nbh' and it will flash.
If you were on stock you'll need the nbh from the stock package.
OK, here is an update
I have tried a hard-reset (press Send and End buttons at the same time and press reset button). This worked but the phone still kept rebooting. Tried the original battery, phone booted a little further up before rebooting.
I got the phone into boot loader mode and left it plugged in on the USB cable for a few minutes. This time when I rebooted I became ecstatic. I got all the way to the “align your screen” stage before hearing the “phone is dying” sound and the phone turned off. So here is what I think may have happened:
I have long lost the home charger kit. So I have, for as long as I can remember, been charging it by plugging it into a PC via the USB. This is fine except that Windows will only power the USB for the device if there is a driver installed. The device/phone looks different to Windows when it is in boot loader mode then when it is fully booted up. If the device is so dead as to not even have a flicker of life I don't think Windows sees it.
I have been doing this tonight under Linux. Linux seems to either have the driver, a more generic driver or powers the USB all the time for any device. I noticed this same behavior when charging my Moto Razr the same way. Under Linux it just worked by plugging it in. Under Widows I had to install the driver. So maybe here is what happened.
The battery got SO dead that it was not able to boot the phone up far enough for Windows on the PC to see it, recognize it and begin powering the USB port. Perhaps leaving the phone in bootloader mode and plugged into a Linux box got the battery a little more charged till I got to the point of being able to align the screen.
Anyway, I am more then ever convinced that this is some kind of battery/power issue. The phone is now lying here powered up and charging (already at 20%). The carrier customizations ran, rebooted while I crossed my fingers, and came back up. I even called *BELL and got a message about activating my phone. Tomorrow if the phone is charged up and behaving normally I will get an ESN change done and be back in the world of decent smartphones. Man have I ever missed my Google Maps
The next step is to flash a more up-to-date ROM... if I dare mess with a good thing.
The Fish

[Q] Screen blank and device shows up as APX, cannot boot

It seems my Nexus 7 seems to be hosed.
It was running the latest android os as pushed out by google (maybe 4.2.1?) Not sure what I did, but I am in the APX mode and I cannot exit it. The screen is completely dark, and I am not sure it is working when I press the buttons.
I have held:
Power button for 60+ seconds
Power + volume up
Power + volume down
Power + volume up + volume down
If the device is plugged into my laptop, I get a beep after holding any aforementioned combination indicating that the system detects the device but it shows up in the device manager as APX with a question mark.
I have opened the back, and disconnected and reconnected the battery.
Prior to noticing it was not working, I set a torrent download using µtorrent. My initial guess was that the battery discharged, but I have been charging it now for a few hours without any resolution.
Please help! I am past the returns for Walmart, and I do not want to ship it to ASUS to have it repaired.
Bump.
This is frustrating. I have never owned an android tablet before, and I had no intentions of rooting it. Now I have no idea if I can even recover it. Other threads are saying I am hosed because nvflash does not work on the nexus 7.
Any ideas besides throwing it in the garbage?
Try letting the battery die.
Or try these tips: http://forum.xda-developers.com/showthread.php?t=1789135

[Q] Nexus 4 now Hard Bricked, stock, It destroyed itself

Hello,
I have been having a few odd issues with my Nexus 4, random reboots, no sound from speakers unless a reboot. Anyway Last night I had it on charge and it started rebooting itself in a loop so I managed to break the cycle and I ended up on a screen with a android on its side with a big arrow pointing at the power button, so I pressed the power button and it rebooted and was sat on the Nexus 4 logo.
I left the phone doing that and when I came back a while later the phone was still on the Nexus logo (which was still animating) but the phone was roasting hot, I turned the phone off by holding the power button.
Anyway, now the Nexus will not turn on, when it is plugged into a power source I get a red LED for a couple of seconds and then it goes out. In device manager I have qhsusb_dload in device manager.
I have done many hours of searching, I tried a few things suggested on other posts using Ubuntu but nothing.
This was a stock device that had only ever been updated with official updates. I can send it back no problem but I thought I would try save everyone's time and effort and see if there was anything I could try.
Thanks
qhsusb_dload stands for Qualcomm high speed download mode. Theres nothing you can do, other than a jtag. Sorry

[Q] Nexus 7 2012 does not charge, does not boot to bootloader - please help

Hi guys,
I have a Nexus 7 2012 which has become almost completely unresponsive.
Possible cause:
Last thing I remember is that I had it in my pocket and when I looked at it later - it was in bootloader mode. I pressed the power button and since then I have not been able to wake it up.
The device does not charge because I cannot feel the battery to be warm after a whole night of charging. I cannot turn it on no matter how long I keep the power button presses. I have tries two minutes on the clock. I cannot enter into bootloader by pressing power and volume down, even though I keep pressing them for two minutes also on the clock.
So I removed the back cover and pulled out the battery connector. Reconnected but there has been no change in condition.
The device shows the following signs of life.
When the battery plug is pulled out I connect it to my Windows 8 PC via the USB cable and I push on the Power button for about 10 seconds, I get in the Windows Device Manager in Other Devices a new(unrecognized) device named APX. When I pull out the USB cable the I hear the windows usb disconnect sound and the device disappears.
When I connect the battery, I connect the USB to my PC. I don't push any buttons and after 15 or so seconds I get a message USB device not recognized in the USB controllers section of the Windows Device Manager. When I press and hold the Power button (or Power and volume down buttons), after 10 sec The unrecognized device is moved to the Other Devices section and again is called APX.
I cannot turn it on. I cannon boot into bootloader. I have tried almost any approached listed here an on Google (about 10 different step by step guides) and I remain in this position.
Please help me bring it back to life. Hope it's possible. What should I try. I am fairly technical and can understand most instructions.
Had same problem,the only solution found charging via dock station.My 5 years old child broke usb port trying insert cable.

Hard Bricked Samsung galaxy s7 edge

Hi! I managed to hard brick my galaxy s7 edge and i wanna see if someone here knows if its hard bricked or soft.
Got root and had renovate rom 2.0 ( n7 port) then i wiped my phone and flashed renovate 3.3 (s7 edge stock)
my phone worked fine on startup and i started to restore my old apps through gmail. i thought it would take a while so put my phone in my pocked and let it be fore about 20 minutes then when i took it up it was complete dead. i had about 67% before it died i tried everything (vol up down home all together) for at least 15+ sec. had it charge over the night ( i noticed that the phone didnt get warm or any leds shown) in the morning i tried everything again and nothing. when i connect my phone to my computer i hear the connect sound and then it disconnect a sec later. if i hold power button down and connect it ( and dont release power) my computer recognize it as onyx8890 and if i release powerbutton it disconnects. cant boot it in any way whatsoever. so what do you think? its only a week old thats the worst part of it!
I have left it to the store I bought it from for warrantable but its still rooted and have a rom on it. well if its complete dead they cant see if its rooted so thats one good thing.
still want to hear you opinion
sorry for bad english
so, from what I understand, u cant boot into any mode, are u even able to see something on screen? (logo, boot screen, etc.) U can try JIG (it somehow make any samsung device go to download mode). otherwise idk.
Hi guys, I have the same problem with my S7 Edge.
Can anyone help?
OK. So I managed to recover my phone.
The phone was dead because of a software crash(nothing on display, no LED light, power+vol. down for reset not working) and when connected to my PC - nothing (just a connect and after 1 sec. a disconnect sound).
But if I kept the power button pressed without letting go, my PC would detect the phone as exynos8890.
I tried to keep pressing the power+vol. down while connected to PC and I realized that the combo worked because after ~7 seconds the phone would disconnect and reconnect itself (but still as exynos8890).
But I tried a different approach. While connected to the PC I tried to keep on pressing power+vol. down. And I could hear that it disconnected and reconnected. But I did not let go of the buttons. And again a connect and disconnect. And again. And after literally 5 minutes of the buttons kept pressed down without letting go and countless reconnects there was finally a change. The disconnect sound was not heard after the connect sound. At that point I stopeed pressing the buttons and when I looked at the phone I could see that the battery icon appeared. Since the phone was connected to my PC, after 1 min. the battery started charging (it was charged 31%). And after that my phone booted fine.
wow
Hi I have just bought an s7 which turned out to be a Korean G930L but I cant get any response out if it apart from the 2 bottom leds and and the blue one. No response from trying to get into recovery or download mode, basically a black screen though it does vibrate on what i think is start up. It is found by pc and Odin and charges ok, I can tell as I can see properties on pc. But no other response. Is it possible that the previous owner tried to root it using non korean rom or TWRP? Any advice on how to fix either getting TWRP on or screen to light up. I am sorry for being so vague I have pulled it apart and checked all of the connections, screen, motherboard etc but nothing. Or chuck it out or put back on eBay. I tried your idea but it only booted once in that 5 minute period so I tried without it plugged in and rebooted several times but still no screen response.

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