[Q] Nexus 7 wont turn on!!! Making a very small buzzing sound. - Nexus 7 Q&A, Help & Troubleshooting

Ever since 2 days ago, my Nexus 7 has not been able to turn on. I have tried holding the volume down button and the power button multiple times, tried that while plugging it in, tried it after waiting for several hours of it being plugged in, and even popped off the back cover to unplug and replug the battery. I tried holding the power button for more then a minute. I have tried everything. One thing I did notice when I took the back cover off is when the battery is plugged in, I can hear a vary faint buzzing sound that appears to be coming from the top of the tablet above the battery area. Not sure what it could be. Wondering if anyone has any recommendations to help me? Thanks!

Bump.
Sent from my Nexus 4 using xda app-developers app

It might help if you could provide more details...
---------------------
Such as...
Prior to your current predicament.... did the device just crash? ... or was it simply dead from power on?
What was the battery charge level? (If you can remember).
Were you rooted? Running a custom ROM? ...or stock?
Have you flashed any custom kernels? ...and if so, which?
What happens when you plug in the charger? What do you see?
What happens when you connect the N7 to your computer?
Have you tried booting into the BOOTLOADER (cf. http://forum.xda-developers.com/showthread.php?t=2133986).
---------------------
The more details you can provide, the more likely somebody will be able to offer a diagnosis, and hopefully a solution.
Rgrds,
Ged.

Last time I checked was the battery was reading 51%. It was during a sleep mode and I tried to wake it up again. I am unlocked and rooted. ParanoidAndroid 3.16 and FrancoKernel r60. I have tried all key combinations with the buttons to get it to turn on. Nothing shows on the screen. Not a flicker. Nothing happens when I plug it in. Loading into the bootloader, nothing happens. The only thing I notice is when it gets power (from either the battery or the charger), a small buzzing sound comes from the top area above the battery. That is it. Tried re-setting the battery connector with no success. Charger does not help in any form. Thank you!

Read my thread:
http://forum.xda-developers.com/showthread.php?p=36493547#post36493547
I bet your issue is addressed there.
Good luck.
-bk

I actually used your forum first before I looked into other possibilities. Unfortunately, the issue still persists. I feel this one is out for the count. DEAD!!! haha too bad. I really liked it!

Sorry to hear that. Since you followed all of my recommendations, chances are your N7 really needs to be returned. Bummer.

maybe need to be returned

Related

I think I'm bricked?

I thought I'd clean up the OP for folks who got here with similar issues as me since it seems more common than we'd like.
Scenario:
Phone does not turn on without the charger or USB plugged in.
When plugged in, it boot loops at the Google logo (i.e. turns off at the logo, and reboots) and gives what is beginning to be referred to as the the 'red LED of death'--where the LED just blinks read.
The bootloader is accessible when plugged in. But trying to boot into recovery causes a loop. If you try to enter recovery, the phone has to turn off then boot back into recovery. But turning off means that when it turns on it will loop at the Google logo. So, booting into recovery is NOT an option.
Download mode is also accessible when plugged in.
Since the bootloader is accessible, it is possible to flash the factory image to the phone, however, doing so does not resolve the boot loop, nor does it allow the phone to turn on without being plugged in.
Fixes which have worked for some people
Instructions in this post worked for a couple people. NOTE: you have to be able to get into the bootloader for this to work.
One person who left it in download mode plugged into the PC (which was off) overnight, and somehow the problem was resolved. Thread here.
Here's a post in this thread from a user who was able to get it booting up again by leaving it on the charger for a bit.
You fool.
abnormalreply said:
In sum: I started using the Faux kernel with AOKP. OC'd to 1.6Ghz and started Antutu. Phone crashed and now it doesn't boot. When I plug in the charger, there's the battery icon with the lighting bolt which I think indicates that the battery is dead. But it's not dead, it was around 95% when I started Antutu. So, it's constantly turning on and off showing that battery icon while plugged in, but doesn't start up. Anything I can do about this?
Also, the computer only detects it briefly, before the phone turns off again, so ADB/fastboot/toolkit seems out of the question, because it doesn't stay detected long enough to do anything.
Click to expand...
Click to collapse
Tape the power button down so it goes into a power cycle. Leave it until the battery is totally dead. Then plug it into the wall outlet, let it fully charge. Then try turning it on.
Sent from my Nexus 4 using xda premium
Your computer only detects it briefly? perhaps it'll detect it if you boot into Bootloader mode (not sure if you were able to from reading the OP)
Press and hold volume down, volume up, and power until the device boots. If you successfully enter Bootloader mode you can find steps on how to return to stock here: http://forum.xda-developers.com/showthread.php?t=2010312
overhauling said:
Your computer only detects it briefly? perhaps it'll detect it if you boot into Bootloader mode (not sure if you were able to from reading the OP)
Press and hold volume down, volume up, and power until the device boots. If you successfully enter Bootloader mode you can find steps on how to return to stock here: [/QUOTE]
Yeah, it would be nice if...en if I get into the bootloader for a second.
Click to expand...
Click to collapse
abnormalreply said:
In sum: I started using the Faux kernel with AOKP. OC'd to 1.6Ghz and started Antutu. Phone crashed and now it doesn't boot. When I plug in the charger, there's the battery icon with the lighting bolt which I think indicates that the battery is dead. But it's not dead, it was around 95% when I started Antutu. So, it's constantly turning on and off showing that battery icon while plugged in, but doesn't start up. Anything I can do about this?
Also, the computer only detects it briefly, before the phone turns off again, so ADB/fastboot/toolkit seems out of the question, because it doesn't stay detected long enough to do anything.
Click to expand...
Click to collapse
i am on the same boat. i already contacted CSR anh they will send me a new one. after flash new kernel and start antutu, the n4 crashed and completely dead.
I'm pretty sure the battery with the lightning bolt means its charging.
Sent from my Nexus 4 using Tapatalk 2
ntt1409 said:
i am on the same boat. i already contacted CSR anh they will send me a new one. after flash new kernel and start antutu, the n4 crashed and completely dead.
Click to expand...
Click to collapse
Omg.. you don't need a replacement. Stop trying to load roms and kernals if you do not know how.
sent via xda premium with nexus 7
Ulver said:
I'm pretty sure the battery with the lightning bolt means its charging.
Sent from my Nexus 4 using Tapatalk 2
Click to expand...
Click to collapse
Yeah, but it's already full charged. Even if I leave it on the charger for a while, it still doesn't start up
KonstantinKeller said:
Tape the power button down so it goes into a power cycle. Leave it until the battery is totally dead. Then plug it into the wall outlet, let it fully charge. Then try turning it on.
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
I would say try this to drain the battery. Then charge it and see what happens.
So how exactly did the phone brick? Just so everyone here knows what not to do. Is it the kernel that caused it since its still in experimental stages?
Sent from my Nexus 4 using xda premium
abnormalreply said:
In sum: I started using the Faux kernel with AOKP. OC'd to 1.6Ghz and started Antutu. Phone crashed and now it doesn't boot. When I plug in the charger, there's the battery icon with the lighting bolt which I think indicates that the battery is dead. But it's not dead, it was around 95% when I started Antutu. So, it's constantly turning on and off showing that battery icon while plugged in, but doesn't start up. Anything I can do about this?
Also, the computer only detects it briefly, before the phone turns off again, so ADB/fastboot/toolkit seems out of the question, because it doesn't stay detected long enough to do anything.
Click to expand...
Click to collapse
Have you tried reflashibg or using your nan droid back up from the recovery console?
Just because our won't not does not mean it is bricked.
It is really ticking me of that many people do not even have our phones and you are exchanging because of ignorance. Surely all these exchanges must impact stock. I know they keep extras but how many?
Stop messing with things you know nothing about until you at least learn..
sent via xda premium with nexus 7
abnormalreply said:
Yeah, it would be nice if I could get into the bootloader :/
But as I mentioned, it 'thinks' the battery is dead so it just keeps turning on and off even if I get into the bootloader for a second.
Click to expand...
Click to collapse
That's the point. It'll turn on and off until the battery is ACTUALLY dead. Then, charge it fully, and try to start it.
Dude this happened to me last night! Same ROM kernel combo! And fired up an tutu after ocing point is this should not be happening just made a thread and seen this here! Freaky! I'm telling u people beware something is up for sure been doing this a long time never seen this before
First if you have an unlocked bootloader, your replacement won't be free. As soon as Google gets it and realizes it's unlocked they will charge you full price for your replacement.
Second, Nexus devices are next to impossible to brick. There is probably a way to reset the device. I would try first unplug the device from your computer or charger and try holding the power button for a full 15-20 seconds. Then try booting into bootloader or recovery. If that doesn't work, try holding volume up and power for 15-20 seconds. If that doesn't work, try volume down and power for 15-20 seconds. And if that one doesn't work try holding all 3 down for 15-20 seconds. This sounds like a problem that would more than likely be fixed by removing the battery and rebooting. Since this doesn't have a removable battery there has to be a built in 'hard reset' that will power cycle the phone.
I am willing to bet there is a way to get this working. I guarantee if I had it here in front of me I could.
Also, like someone else has said before, if you are a not good at diagnosing problems, troubleshooting problems, fixing this kind of stuff on your own and adb/fastboot, it makes no sense to be using experimental software on your device. Especially if you plan on pushing its boundaries by overclocking and running benchmark software. If I were you, after you get this straightened out, wait a while until stuff is more ppolished and tested better.
So, by sheer luck, I was able to get into the bootloader and have it stay on. I was then able to use the toolkit (option 9) to flash the google factory stock image. This completed successfully, and I was also able to re-lock the bootloader, but I still have the same problem as I did before: battery charging icon and constant reboot. So, it's completely stock now and the issue is still there. Would it be reasonable to assume that the issue isn't software and I somehow got a hardware failure?
Yo hold power down then plug USB in then right after hold all three button .like after u plus in USB while holding power button then at same time hold volume buttons also this is how I got into download mode.....but.....phone was not detected and comp SD there was a driver failure. But yes dude phone was charged. And I had same exact combo as u I mean same exact. This is why it is freaky. Aokp was fine all day then when I flashed faux test kernel and fired up antutu I just had a flash then nothing. Not blaming anyone of course it was me who chose to flash after all this is custom software and I love these guys work just wish I knew what did it ....like what actually did it
Richieboy67 said:
Omg.. you don't need a replacement. Stop trying to load roms and kernals if you do not know how.
sent via xda premium with nexus 7
Click to expand...
Click to collapse
Seriously... thousands of people waiting for the phone to become available, and people who deserve to have their phone bricked are getting 2nds for free.
abnormalreply said:
So, by sheer luck, I was able to get into the bootloader and have it stay on. I was then able to use the toolkit (option 9) to flash the google factory stock image. This completed successfully, and I was also able to re-lock the bootloader, but I still have the same problem as I did before: battery charging icon and constant reboot. So, it's completely stock now and the issue is still there. Would it be reasonable to assume that the issue isn't software and I somehow got a hardware failure?
Click to expand...
Click to collapse
I was able to do the same thing but it would vibrate then see Google for a sec then nothing and back to a blinking red light....dude this is crazy I can't. Believe this happened to another person the same exact way
dammit. And I was just going to try this combo. Guess that's gonna be a no go.
Last ditch effort is to unscrew the two t5 screws at the bottom and do a real battery pull. Probably wont work, but what do you have to lose?

Nexus 7 won't turn on

It seems there are already several threads about this seemingly common issue with this tablet, but I've tried the normal checks and still can't get any life out of my dad's nexus 7 whatsoever.
I've found several threads stating it's just a loose battery, but in this case it isn't. I've checked absolutely every single connection I can get to without removing the void if removed bits, and can't find anything suspect. However it still won't turn on, won't charge, etc. It's not a faulty charger or cable either, we've all got android in my immediate family and we can't get any life out of it with any lead or charger. It was simply working one day, it was turned off the way it always is once my dad had finished using it, and now it simply won't come back on again.
I also saw some people say to get it into bootloader mode by holding volume down and power straight after plugging it in, but that too does nothing whatsoever?
Does anyone know of anything else I can try, short of sending it back to Asus?
How long have you had it?
This sounds like something that should be addressed as a warranty situation, as anything else may be kludgy at best, and may fail again just after your warranty runs out.
I wouldn't really waste any more time.
JMnsHO.... :beer:
My dad has had it about half a year, maybe a little more. But he bought it from Comet, who no longer exist since they went under just after Christmas, so he can't return it to them now. Unless it'd just go straight to Asus instead.
I had exactly the same issue.......I fixed it by disconnecting the battery and reconnecting which by the sound of your post you have already tried.......you should be able to go straight to Asus for repair.......good luck....
Sent from my Evo 3D GSM using xda app-developers app
After probably 30 days it would need to go back to ASUS anyway.
As I'd said, I wouldn't waste more time fussing with it.
They'll take care of it and still preserve the balance of the warranty.
If you messed with it too much, you may find yourself with none at all, and on the hook for the cost of the repair.
Make the call.. :thumbup:
Well I've not done anything that shows I've been in there like I say, so any manufacturer warranty should still be intact. Same goes for the software too, not rooted, on the standard rom and kernel, etc.
I was just hoping I could fix it for my dad without having to send it off.
Not yet, but anything else would be more 'intrusive'.
How long have you been working on it?
Not long, only 10 minutes here or there to see if I could find something loose. I might check the voltage of it's battery to see if it's flat, and also check to see if any power is getting to the battery while charging. That'll help prove if the battery or it's control board is dead or not.
Just checked the battery over. It's a 3.7v battery according to the label, and my multimeter shows 3.7v, so the battery is fine with no loose connections. At the connector for the power button ribbon cable, I get the 1.8v that should trigger the tablet to power up when the power button is pressed, and the power button is good too, only showing continuity when pressed. Again, no loose connections. But the bloody thing still won't turn on.
Any more ideas?
When you say that you "tried all the normal checks", does that include all of the fixes listed in the sticky dedicated to this subject?
billykxda said:
When you say that you "tried all the normal checks", does that include all of the fixes listed in the sticky dedicated to this subject?
Click to expand...
Click to collapse
Yes, your thread is about a faulty or loose battery. As I've said, it's not a loose connection and I've now tested the battery too. Unless you can think of something that I've missed?
StuartTheFish said:
Yes, unless you can think of something I've missed.
Click to expand...
Click to collapse
That sticky has all of the well-researched methods of addressing the collection of related issues (won't turn on/won't turn off/battery status). It is not only about a faulty or loose battery - there's much more.
Give it a read and let me know if there's a fix in there for you.
billykxda said:
That sticky has all of the well-researched methods of addressing the collection of related issues (won't turn on/won't turn off/battery status). It is not only about a faulty or loose battery - there's much more.
Give it a read and let me know if there's a fix in there for you.
Click to expand...
Click to collapse
I have read it all, and unfortunately there's nothing in it for me.
If your able to get to bootloader maybe try to power off then let it charge for awhile then boot, or hold the power button for a good min
It won't turn on at all, so it can't get into the bootloader. Tried already.
StuartTheFish said:
It won't turn on at all, so it can't get into the bootloader. Tried already.
Click to expand...
Click to collapse
I know you tried almost everything in the box, but when you plug it in the wall and press and hold the power button do you see the screen light up but still black?
If yes ( hopefully ) then continue holding power button then press VOL down til arrow pointing with START appears. Cycle through with VOL down til you see power off and select.
After it shuts down unplug from wall and replug and let it sit for a long awhile
If this didn't help at all sorry......good luck....warranty?
RubbleTea said:
I know you tried almost everything in the box, but when you plug it in the wall and press and hold the power button do you see the screen light up but still black?
If yes ( hopefully ) then continue holding power button then press VOL down til arrow pointing with START appears. Cycle through with VOL down til you see power off and select.
After it shuts down unplug from wall and replug and let it sit for a long awhile
If this didn't help at all sorry......good luck....warranty?
Click to expand...
Click to collapse
Nothing happens whatsoever mate, even while plugged into the charger. Tried the original charger, my s4 charger, my old HTC chargers, from the pc via USB, etc. None of them make any difference.
Got a feeling it might be the motherboard, as it has power. Can't be the display since I've tried getting a logcat from it after holding the power button for a while to make sure it would have turned on. ADB just kept saying "waiting for device" as if it wasn't plugged in, confirming it isn't even turning on.
Can anyone think of anything I've missed?
StuartTheFish said:
Can anyone think of anything I've missed?
Click to expand...
Click to collapse
Can the pogo pins be used to charge? bit of a long shot and you`d need to buy/borrow a dock of some sort. Definitely sounds like a hardware failure issue.
Sent from my Nexus 7 using xda app-developers app
Pogo pins?
It already seems to be charged though.

[Q] Nexus 4 not turning on - red light of death?

Hello,
I know, there are several threads about this issue, and I checked them all, tried all what they wrote, still nothing changed.
Yesterday I've installed KitKat on my mobile. I've tested it for an hour than installed CM 10.1.3 back. At first, I had no Wi-fi, neither for second try. I read that I need to flash a modem.zip to fix that. So I did that, reinstalled CM again and on system reboot, my phone didn't turn back on.
I doubt its battery issue cause it was on charger and was around 74% (after I couldn't do anything, I left my Nexus on charge whole night, but nothing changed).
The red light appears when the phone is plugged and I press the buttons for 15/60 secs, than fades after few seconds.
Have you got any idea? I can't enter recovery, nothing at all.
After trying every solution - and when I say every, I mean that all possibilities found over the whole internet - the only thing I could do is giving a call Google support. Since I bought my phone in SF, my warranty is up only there (and I live in Hungary).
Luckily, they send me a new one, but only to an US address, else I should call LG for help.
About the issue:
the red light - also called as the red light of death - is a known Android bug. The OS it self lowers the battery's strength, so the phone gets a very few energy which causes that you are not able to turn on the device. When I mentioned this red light thingy to the support, she only said "ahh, that..." and asked me if I want a new Nexus 4 or I want my money back.
Sounds like your phone is bricked.
Generally Google/LG is fine with rooted phones, at least in my case. I'd give It back and get a new phone.
Sent from my Nexus 4 using Tapatalk
So what you say is that after you flashed the Modem fix zip your phone went into red light mode?
Maybe you flashed a wrong zip file, which bricked your device? What zip file did you flash?
I fixed mine. You must be plugged in to a charger. Turn off. Which it should be already. Then press power button for long enough go the red light to turn green. Then yank off the USB. The phone thinks its out of juice. It is and does happen. But I got mine working this way. Timing is key.
Sent from my Nexus 4 using xda app-developers app
leave it on the charger for a while.
but, the only 100% method to get your phone back is to take the back off, remove the battery, then plug the battery back in. the "resets" your battery. this would be a normal battery pull for a device with a removable battery, but since the n4 doesnt have a removable battery..
Guys, I've tried all these and nothing helped. It happened a week ago, so the battery had time to go on 0%, I've charged it and still no life signals... I even removed the battery - nothing.
Meanwhile, Google decided to screw me up, so we keep trying to resurrect the phone...
About the modem.zip: doubt it was a bad zip, cause others used it before me also. I had a bad luck, happens...

[Q] Can't Power On

I was using the Nexus Root Toolkit v1.7.9 to flash stock back onto the device when it hung. Went to a black screen and then refused to power on. To elaborate, it will not display a battery icon when on the charger, nor can I get the device to display anything on the screen with any button combination. No fastboot. No twrp. Nothing. The only sign of life I have gotten from it is when connecting a usb to my computer (Windows 8.1) and holding down the power button on the device, I can hear it "connect" to the computer. In device manager, it shows up as APX. It had previously been shown as a USB device that could not return an ID...or something to that effect.
Without being able to boot the device up, I am clueless as to what to do. I have tried charging it for an hour. I have tried all button combinations, along with holding them for various lengths of time. I am just out of ideas and can't seem to find anyone else experiencing this exact issue.
Is anybody with more experience able to point me in the right direction?
Thanks in advance.
This happened to me awhile ago. When I first started to read about this issue it was that the battery becomes lose causing this issue. Another is just letting it sit idle for so long and no matter what the battery level it would cause this as well. Sorry can't remember all the technical stuff on that one.
I eventually contacted asus and sent it back. About two weeks later I was sent a new one.
Sent from my SCH-I545

Nexus 7 won't charge/power on/can't access fastboot or bootloader

Hi guys,
My Nexus 7 (2012) turned off(not properly) when the battery level was low and won't power on. I tried a battery from a working tablet and tested my battery in another tablet. It seems like the issue is somewhere else.
These are the things I tried:
- leave it for a couple of hours charging (no battery sign at all)
- hold the power button with/without the volume levels while it being both connected and disconnected.
- tested my battery in another tabled and put a fully charged battery from another tablet
- made sure that the battery is connected
There was one more thing I tried - to press the Power button with no battery inside but the tablet being connected to a laptop via the USB cable. One could hear something like a boot noise coming from the tablet (doesn't happen when the battery is inside)
In December, 2015 I installed a Custom ROM with android 5.1.1 which I found here http://forum.xda-developers.com/nexus-7/development/android-6-aosp-grouper-t3268172/ (the thread was renamed and is now about the Android 6 update) The tablet worked fine for these 3 months but one day when I was checking my email it went off and won't respond to any actions.
Could you please help me to fix it? I'm just not ready to give up on this tablet. Thanks!
Both you and i, same model, essentially, the same circumstances. I also tried every method you mentioned as well. Even down to the flashing of a rom. Same results. I even tried "jump starting" the battery. Not wanting to give up on it. It sits in my closet like that boy in A.I at the bottom of the ocean, waiting... I know that is not the reply or help you were looking for. Just so you know, you are not alone..
Sent from my LG-H345 using Tapatalk
ge1026 said:
Both you and i, same model, essentially, the same circumstances. I also tried every method you mentioned as well. Even down to the flashing of a rom. Same results. I even tried "jump starting" the battery. Not wanting to give up on it. It sits in my closet like that boy in A.I at the bottom of the ocean, waiting... I know that is not the reply or help you were looking for. Just so you know, you are not alone..
Click to expand...
Click to collapse
Well, that's a good start, at least I am not the only one!
Have you tried to connect your device via USB? My laptop can see a connected device but it can't recognize it and I hear some sounds coming from the tablet when I try to hold the `power` button. This made me think that it can be a display/screen related, so the device works but we can't see it due to the broken screen/display. Don't know how to check that though.
Same here, stock Nexus 7, won't turn on, just switched off one day and won't come back on, have tried everything as suggested above, can't get it to flicker, doesn't even register the power connection with a green light or anything
topmuffinsecret said:
Well, that's a good start, at least I am not the only one!
Have you tried to connect your device via USB? My laptop can see a connected device but it can't recognize it and I hear some sounds coming from the tablet when I try to hold the `power` button. This made me think that it can be a display/screen related, so the device works but we can't see it due to the broken screen/display. Don't know how to check that though.
Click to expand...
Click to collapse
Try replacing the screen, just to check. If that doesn't fix it, at least you have a brand new screen!
I'm currently having the same issue, haven't used it in 6 months and when I tried to turn it on, nothing happens
---------- Post added at 09:39 PM ---------- Previous post was at 09:32 PM ----------
Planters76 said:
I'm currently having the same issue, haven't used it in 6 months and when I tried to turn it on, nothing happens
Click to expand...
Click to collapse
I fix mine,
let it sit on the charger for a hour, then hold down the button for 20 sec
same issue here as well ive had it for about a year and im not able to access anything via my pc google help forums had no answer either, looks like we may be screwed..........
Hi, I just had same issue with my tablet only thing is that I was using it with ~20% of battery, nothing special - browsing the web using chrome, then the screen lit gray and shut off. After that no response either from charger, holding power button for 60+ seconds didn't work either, tried re-connecting the battery, still with no signs.
And then, I tried to plug in the charger and then pressing VolumeDown+Power immediately after connecting the charger. Suddenly got some response, that battery charging icon appeared, and it shows my battery charging, but from 0%. Still waiting to charge a bit until I can try to boot it.
I'll update this post with any news.
EDIT: When I connected my tablet to the charger it had that hissing sound, but after few minutes it stopped.
After 15 minutes of charging I managed to boot my Nexus7 with 7% of charge in it a that moment, It seems to work for now.
Summarry of what I did to solve my problem:
1. Opened the back of the N7 (I used a guitar pick for this) and re-connect the battery.
2. Then plugged in the charger and at the same time pressed VolumeDown+Power, battery icon lit up but went out, repeated step 1, and then step 2 again gave me animated battery charging animation which showed up for like 10 seconds
3. Waited for 10-15 minutes and tried to boot normally. And it works now
MrBratka said:
Hi, I just had same issue with my tablet only thing is that I was using it with ~20% of battery, nothing special - browsing the web using chrome, then the screen lit gray and shut off. After that no response either from charger, holding power button for 60+ seconds didn't work either, tried re-connecting the battery, still with no signs.
And then, I tried to plug in the charger and then pressing VolumeDown+Power immediately after connecting the charger. Suddenly got some response, that battery charging icon appeared, and it shows my battery charging, but from 0%. Still waiting to charge a bit until I can try to boot it.
I'll update this post with any news.
EDIT: When I connected my tablet to the charger it had that hissing sound, but after few minutes it stopped.
After 15 minutes of charging I managed to boot my Nexus7 with 7% of charge in it a that moment, It seems to work for now.
Summarry of what I did to solve my problem:
1. Opened the back of the N7 (I used a guitar pick for this) and re-connect the battery.
2. Then plugged in the charger and at the same time pressed VolumeDown+Power, battery icon lit up but went out, repeated step 1, and then step 2 again gave me animated battery charging animation which showed up for like 10 seconds
3. Waited for 10-15 minutes and tried to boot normally. And it works now
Click to expand...
Click to collapse
Thanks mine was taking forever to charge so I unplugged the battery waited a few minutes and then it worked it charged faster
Sent from my SM-N920V using XDA-Developers mobile app
MrBratka said:
Hi, I just had same issue with my tablet only thing is that I was using it with ~20% of battery, nothing special - browsing the web using chrome, then the screen lit gray and shut off. After that no response either from charger, holding power button for 60+ seconds didn't work either, tried re-connecting the battery, still with no signs.
And then, I tried to plug in the charger and then pressing VolumeDown+Power immediately after connecting the charger. Suddenly got some response, that battery charging icon appeared, and it shows my battery charging, but from 0%. Still waiting to charge a bit until I can try to boot it.
I'll update this post with any news.
EDIT: When I connected my tablet to the charger it had that hissing sound, but after few minutes it stopped.
After 15 minutes of charging I managed to boot my Nexus7 with 7% of charge in it a that moment, It seems to work for now.
Summarry of what I did to solve my problem:
1. Opened the back of the N7 (I used a guitar pick for this) and re-connect the battery.
2. Then plugged in the charger and at the same time pressed VolumeDown+Power, battery icon lit up but went out, repeated step 1, and then step 2 again gave me animated battery charging animation which showed up for like 10 seconds
3. Waited for 10-15 minutes and tried to boot normally. And it works now
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Click to collapse
This helped me get my N7 2012 back up and running, too. Thank you so much!
We are not alone
topmuffinsecret said:
Hi guys,
My Nexus 7 (2012) turned off(not properly) when the battery level was low and won't power on. I tried a battery from a working tablet and tested my battery in another tablet. It seems like the issue is somewhere else.
These are the things I tried:
- leave it for a couple of hours charging (no battery sign at all)
- hold the power button with/without the volume levels while it being both connected and disconnected.
- tested my battery in another tabled and put a fully charged battery from another tablet
- made sure that the battery is connected
There was one more thing I tried - to press the Power button with no battery inside but the tablet being connected to a laptop via the USB cable. One could hear something like a boot noise coming from the tablet (doesn't happen when the battery is inside)
In December, 2015 I installed a Custom ROM with android 5.1.1 which I found here http://forum.xda-developers.com/nexus-7/development/android-6-aosp-grouper-t3268172/ (the thread was renamed and is now about the Android 6 update) The tablet worked fine for these 3 months but one day when I was checking my email it went off and won't respond to any actions.
Could you please help me to fix it? I'm just not ready to give up on this tablet. Thanks!
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Click to collapse
I have done same, Mine is , My son had it and ran it to 0%, charging port was iffy, put new one charging port in this morning, nothing, not even battery DEAD sign, nothing tried power, button / volume trick , I did notice on the power/volume button, there is a 4th, anyone have a clue, cannot find what im looking for to answer that.
I have a smart young co-worker looking at it for me right now.
cdb2643 said:
I have done same, Mine is , My son had it and ran it to 0%, charging port was iffy, put new one charging port in this morning, nothing, not even battery DEAD sign, nothing tried power, button / volume trick , I did notice on the power/volume button, there is a 4th, anyone have a clue, cannot find what im looking for to answer that.
I have a smart young co-worker looking at it for me right now.
Click to expand...
Click to collapse
Probably this post can give you some ideas how to recover your device.
AndDiSa said:
Probably this post can give you some ideas how to recover your device.
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Click to collapse
Honestly, I do not think it is the battery, I can see the Charge signal, and the Battery is showing 1,784 VDC tested unplugged and disconnected, my smart young co-worker seems to think POST is failing, I still never see a "Charging" indication.
Does anyone know , Is there a fail safe, say the battery is disconnected, and usb charger is plugged in, will i just see all 5VDC at the sub port, ?
I never see a screen flicker, DEAD battery sign, nothing.
co-worker, tried some things that made sense when he explained what he did, I would have to agree with him.
Now it is rooted, 4.x something I forget, Never went to 5.x did once early and did not like it, Back stock, ran 2 days no issues, Rooted again, 4.x still do not remember, worked great 3-4 months, Sons ran it to DEaD and that was it, put it up for 90 days or so, wife got new tablet, kids have Fire each, and here i am tabletless, CRAP, did not want to throw to much $$$$ at this thing, nor did I want to buy a new one.
Samsung Tablet here we come.
any body want this Nexus 7, it is a 2012 model.
cdb2643 said:
Honestly, I do not think it is the battery, I can see the Charge signal, and the Battery is showing 1,784 VDC tested unplugged and disconnected, my smart young co-worker seems to think POST is failing, I still never see a "Charging" indication.
Does anyone know , Is there a fail safe, say the battery is disconnected, and usb charger is plugged in, will i just see all 5VDC at the sub port, ?
I never see a screen flicker, DEAD battery sign, nothing.
co-worker, tried some things that made sense when he explained what he did, I would have to agree with him.
Now it is rooted, 4.x something I forget, Never went to 5.x did once early and did not like it, Back stock, ran 2 days no issues, Rooted again, 4.x still do not remember, worked great 3-4 months, Sons ran it to DEaD and that was it, put it up for 90 days or so, wife got new tablet, kids have Fire each, and here i am tabletless, CRAP, did not want to throw to much $$$$ at this thing, nor did I want to buy a new one.
Samsung Tablet here we come.
any body want this Nexus 7, it is a 2012 model.
Click to expand...
Click to collapse
I would be more than happy to take it off of your hands mate. Probably gonna use it for parts to keep mine running.

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