[Q] Not recognized by computer, Red dot of death - Nexus 4 Q&A, Help & Troubleshooting

Ok so:
Had CM 10.2 nothing else crazy (unlocked/rooted)
One day wifi started acting up (kept dropping) and USB started not being recognized.
Decided that maybe software might be acting up, switched to PA 3.99RC2: FUll Wipe, reinstall
Next day riding out to a meeting phone starts rebooting randomly while running Google maps and music
Keeps locking up and rebooting
Getting really hot
Turn phone off, go to meeting
Phone will not turn back on (solid red dot by usb)
Go home
Recovery no go, phone will not charge on wall or USB charging at all.
Red dot comes on when plugged into wall then turns off after about 30min, plugging/unplugging turns the solid red dot on again.
Put on wireless charger, for an hour
Phone boots up, at 60% charge
USB only charges phone does not send any kind of signal that it is there, no windows sound, nothing in device manager
No charging light at all, but the icon shows as charging.
Have airdroid installed, might try stock google, but it looks like something hardware related.
Has anyone experienced something similar?
Since I don't have ADB working how do I return to stock? (I presume unpackage the distro, airdroid them over, and then install individually?)
I called Google and they say that if they deem that the phone works, not only will they keep the phone I sent them, but they will also charge me for another nexus 4, this is kinda BS and wiht the Nexus 5 around the corner it seems even more BS.
Not sure what to do, as I have about another 1.5 weeks of warranty left. The USB seems jacked up but I am not sure if there are other diagnostics to confirm.

Slappy00 said:
Ok so:
Had CM 10.2 nothing else crazy (unlocked/rooted)
One day wifi started acting up (kept dropping) and USB started not being recognized.
Decided that maybe software might be acting up, switched to PA 3.99RC2: FUll Wipe, reinstall
Next day riding out to a meeting phone starts rebooting randomly while running Google maps and music
Keeps locking up and rebooting
Getting really hot
Turn phone off, go to meeting
Phone will not turn back on (solid red dot by usb)
Go home
Recovery no go, phone will not charge on wall or USB charging at all.
Red dot comes on when plugged into wall then turns off after about 30min, plugging/unplugging turns the solid red dot on again.
Put on wireless charger, for an hour
Phone boots up, at 60% charge
USB only charges phone does not send any kind of signal that it is there, no windows sound, nothing in device manager
No charging light at all, but the icon shows as charging.
Have airdroid installed, might try stock google, but it looks like something hardware related.
Has anyone experienced something similar?
Since I don't have ADB working how do I return to stock? (I presume unpackage the distro, airdroid them over, and then install individually?)
I called Google and they say that if they deem that the phone works, not only will they keep the phone I sent them, but they will also charge me for another nexus 4, this is kinda BS and wiht the Nexus 5 around the corner it seems even more BS.
Not sure what to do, as I have about another 1.5 weeks of warranty left. The USB seems jacked up but I am not sure if there are other diagnostics to confirm.
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2010312
Scroll down to the 2nd post...I'd return it all to stock and RMA it.

mrhiab said:
http://forum.xda-developers.com/showthread.php?t=2010312
Scroll down to the 2nd post...I'd return it all to stock and RMA it.
Click to expand...
Click to collapse
Thanks for the tip, I was just wondering how this sort of malfunction happens. I never really used the USB port after I got wireless charging, so maybe some light dropping? I dunno

Related

[Q] Aria not charging

I've had my Aria for about a month now, and just last night I started running in to trouble getting it to charge. I had plugged my phone into an outlet when I went to bed (I saw the orange light go on, then turned the screen off) and when I checked my phone the next morning, the charging LED wasn't on and the battery was at 42% (a fan was plugged in, too, and it was clearly working, so it's not the outlet).
Now, no matter if I plug it in to the wall or my computer, the charging LED SOMETIMES goes on for a second or two, but then as soon as I turn the screen off the LED goes off. Also, if I get it to start charging while using the phone, I noticed that putting the phone face-down makes it stop charging. I can't connect it to my computer to sync or anything, and Windows sits there and makes the "device connected" and "device disconnected" sounds in rapid succession.
Does this sound like a problem with my Aria's software, hardware, or the charger itself?
One thing you can do is take it to where you bought it and have them open a new box or use a known good charger and usb cord to test those two parts out. If that does not fix it then you are right there to take a new phone home.
So I forgot about the #1 rule when it comes to dealing with fussy electronics: Wait a day. Nothing changed, physically or software-wise, but my phone will now charge just like it used to.
Of course, thinks makes me suspect that something was freaking out on the software side, but hopefully it won't happen again once I put CM6 on it.

[Q] Boot problem I can't seem to find a fix for

I've seen a few people with the exact same problem around the web, but no one has ever posted a solution (if they ever found one).
The kids were playing Angry Birds on the Nook before dinner, when I went to turn it back on after dinner it wouldn't boot (was working when I put it down).
When I plug it in the wall charger the light is always green.
When I plug it into a computer USB port it is momentarily detected as omap 3630 instead of Nook Color like it used to, then windows reports that it's been disconnected.
It had been running CM7 for a few weeks off of emmc, but now I can't even get it to boot from a uSD card into CWM.
When plugged in (computer or wall charger) I can see the backlight turn on and off every few seconds.
No combination of button presses seems to have any effect (power, power+n, power+n+vol+, etc.)
Try holding the power button for a full minute... release and try turning it on again... see if that don't do it.
Thanks for your reply.
I wish that worked, but I don't even see the back light flicker on for a split second unless it's plugged into the wall or a computer.
It's a shame too, I got it as a Christmas present from the wife and our toddlers really loved to play the games on it. They keep asking where "bad birdies" went
Your problem sound similar to an issue I had with charging. I has a bad charger/usb cable. Its a known issue and BN will replace it for free. If you are registered, call BN support a request a new one. I have done this twice. Once when the end bent and a second time when I had a green N but not juice (just flicker and/or a 'plug in the charger' symbol). The NC requires more power than the typical usb charger/cable setup, thus spares usb chargers AND cables around the house do not work.
I hate to do this because it was so maddeningly frustrating to see the same thing posted in the thread about boot problems here and elsewhere, but it turned on today and I have no idea why.
I'd been messing with it for a few days and finally after an unsuccessful morning I left it on my dresser. I was in the kitchen making hot chocolate after playing in the snow with the kids when my two year old comes walking down the stairs with the nook and drops it at my feet. When I went to pick it it, it was in the process of booting. Whether he had done something to it or the short fall jarred something that was loose I can't say, but it now seems to be fine.
It had about 50% battery and the lights on the charging cord now respond like they should.
I have no idea what happened, but I wish I did so I could help others in my boat.
Still could be your charger/usb cable. When the charger/cable start going bad, it takes for ever to charge. Like all day just to get enough juice to boot up. If it dies again and doesnt reboot after its been on the charger for a few minutes or you're only getting a partial charge over night, its the charger and or cable.
It charged fine overnight.
There definitely must be something loose on the inside. If I give it a fairly significant whack (nowhere near a punch, but harder than a tap) it will reboot. I think it was a refurbished unit. The newer units seem to have serial numbers where the first four digits correspond to the year. The first four digits of this one are 2004! Looks like they never fixed what was wrong in the first place.
You just ran it too dead. It won't power on until it's established a decent charge first.
Sent from my MB865 using xda premium

Started acting funny

Ok so last Sunday the phone started acting funny:
Preface:
-Dropped it a few times ~3ft in a case, no apparent damage
-CM 10.1.3 RC2 (I had been running this for awhile)
-Stock Kernel
-No non-mainstream apps running (all from the google play store), nor apps that mess with performance/function.
-No tweaks or other things.
Issue:
-Sunday:
-Last Sunday my phone would randomly shut down and get really hot, reboot all that jazz
-WAs working perfectly fine before, I didn't install any new apps or tweak anything.
-Wipe, reinstall 10.3.1, reinstall gapps (this was already on internal SD)
-Problem persists, ok I'll get a different rom
-Plug in USB, device not recognized, charges but, cannot recognize the device (not appearing in Device Manager either).
-Reinstall LG drivers... nope still not helping.
-Use Airdroid, wipe and install P.Android 3.99RC2
-USB still not working, otherwise seems stable, charging.
-Monday:
-On my way to job interview, running google maps, and google music.
-3/4 of the way there phone gets hot and maps locks up.. reboot.
-Will not start up sometimes
-When it does startup, it will lock up in maps and reboot, or just reboot before I get to maps (like when i drop the menu down)
-Manage to get to interview by having maps stay up for more than a few seconds. Turn off phone.
-On the way home the phone will not turn on, and doesn't want to charge for long. (red light goes off after a little bit)
-When it does turn on it gets stuck on the PA boot screen (not freeze up but just stays there) and gets hot.
-Turn off phone.
-Buy a Note III
-Try to charge N4 wirelessly... doesnt work all the time, the pad makes the noise but the phone does not light up and charge (moving it around doesn't help)
-Give up for awhile
-Last night
-I put the N4 on the wall charger and the red light turns on ... great it's charging
-This morning:
-Take it off the charger (charging light is off) and it is charged to 54%... wtf
-Turn it on... boots.
-Find out I have 3 weeks of warranty left (Nov 11th) call Google.
-Phone is working fine (no USB still, on my work computer this time)
-Listen to the blatant ripoff that is the warranty (more on this later)
-20min later phone is at 19% (battery stats says that the main draw is the screen: 39%)
Ok so that's the story so far. I have about 3 weeks to make a decision on the RMA but the warranty service is such that if your device is not faulty when they receive it, they will not only charge you for the device they sent you but they will not give you back your old one, in other words you basically sold your phone to Google for $0 and you bought a new one at full markup. This makes little sense to me as if I'm paying for a new phone, I want my old one back. Compounding this, a new NExus should be released in a few weeks, if I am gonna pay full retail i might as well get the new one, but I digress. I am going to put it back to 100% stock and locked, and see what happens there, but I am wondering:
-if anyone has had similar issues with this phone?
-If I chose not to chance sending it in, how hard is it to change the battery (I've done a iphone 3GS before)?
-What can come loose in there?
Thanks! :good:
It is fairly easy to change the battery, I had to change mine my self because I already replaced the screen my self, and Google doesn't accept a phone if you took it apart. The problem here is that I am not sure if its your battery that has the problem. Mine was expanded, so the glass back was somewhat bent and not flat. Do you have that problem? You might have a problem with the USB or the battery. When I had my battery problem my phone was charged at 100% and when unplugged it would die at about 80% and then when I plugged it back in I would get 30%. Also I almost never got a red light of death except for once and it wasn't due to the problem. I would say you should try doing an RMA, but first try factory images
Sent from my Nexus 4 using xda app-developers app
Yeah seems like the usb port and maybe the battery as well got shake because of the drops.
You can open the back cover, look visually at the battery to make sure its not inflated, also disconnect the battery's flex cable and reconnect... See if nothing broke at the usb port (on its board).
Sounds like battery might be the culprit.. Try the suggestions above^^^
let see...dropped it a few times ~3ft in a case ||

[Q] N4 doesnt turn on. Red Light blinks once.

Hello.
When I try to turn on my N4, I hold power button, and after about 10 seconds Red light blinks (just once, if it's connected to USB that 1 blink last for 3 seconds, if connected to wall, it's just quick 1 blink. If it not connected anywhere there is no action at all, it just stays dead, no blinks, nothing). Same if I try to go in bootloader by holding volume down+power.
This happened after I successfully installed CM12, with no errors. Then I rebooted my phone, and it just stayed black as it is now. Battery was around 25~30% that time, and phone was connected to USB.
Did I bricked my phone totally? I am now trying to charge it up already for 1 hour... but it nothing changes.
I have searched here for similar problems, but couldn't find solution...
Edit: Charging already for 10h+ , still same..
Edit2: I removed battery, reconnected after a while, still same problem.
So I tested it with multimeter, it says 2.6V, but fully charged must be 3.8V. Could this be a problem? I was charging it for whole night.
Edit3: I just got new battery . But it looks the same.. phone doesn't boot up.. same red light blinks once.. so.. its my phone is dead? I can't believe that...
When I connect to PC usb, there are unrecognized deviced called "QHSUSB_DLOAD".
easy fix
Hold down the power button and the volume down button at the same time until phone reboots. If you see the little android no need to worry just let go and wait for your device to reboot on its own. This is not a factory reset it's just like restarting your device. :good:
zelexon said:
Hold down the power button and the volume down button at the same time until phone reboots. If you see the little android no need to worry just let go and wait for your device to reboot on its own. This is not a factory reset it's just like restarting your device. :good:
Click to expand...
Click to collapse
I have tried that many times. Nothing. It's bootloader screen, but I can't get there. Nothing happens. If I keep holding volume down+power it just keep blinking once every ~10 seconds, same if I hold just power button. If phone is not connected to charger, there are no blinks at all.
I removed battery, reconnected after a while, still same problem.
So I tested it with multimeter, it says 2.6V, but fully charged must be 3.8V. Could this be a problem? I was charging it for whole night.
Cracken6 said:
I removed battery, reconnected after a while, still same problem.
So I tested it with multimeter, it says 2.6V, but fully charged must be 3.8V. Could this be a problem? I was charging it for whole night.
Click to expand...
Click to collapse
I had the same problem a year ago, I tried to remove the battery, charging all night, and other solutions that I found online and no one worked.
Finally I found here in XDA a user with the same problem and his solution was charger the phone with a wireless charger, a friend of mine has one and I put the phone to charge and after a few minutes the screen goes on and the phone was charged, then I press power button and the nexus run again.
Hope this works.
Sorry for my bad English, I'm from Spain.
Good luck.
(I bought a wireless charger in case it happen again)
I don't know anyone with wireless charger. I already ordered a new battery, and then I probably will get wireless charger also. Ty.
But this problem is very weird if you think so.. I think it happened because of many aspects together:
1) Battery was already below 30%
2) I pretty regularly charge phone with USB (won't do it again)
3) It was connected to PC USB in same time.
4) I installed CM12 ROM in same time
So main reason I think is USB, that I restarted phone while it was on pretty low battery and with USB connected.. phone restarted and got invalid voltages and couldn't even boot up or charge phone. I also found an article which says, minimum voltage, when phone battery has 0%, it's 3.0V, so I was below that.. it just screwed everything and battery died. Well, I am not sure for 100% that it's battery fault, but I hope so, I really love my N4 and still wanna use it for long time, I hope it's not dead phone, just a dead battery. Lets see! I will update this thread , when I get my new battery (less than month probably).
Sorry, my english is also not perfect. I am from Latvia.
I was playing when it happened to me. The phone was very very hot and the battery was around 70%. When I put in the wireless charged and I can reboot the phone the battery was at 65%, so it had charge but the phone won't boot.
I charge my phone almost every day, sometimes with AC, others with USB (plugging to PC) or wireless that depends of my needs
I hope you can fix it. Good luck.
Btw. Do you know if battery charges with wireless charger, if it's removed from the phone?
Don't think it does, since the receiving coils for wireless charging are located just behind the glass back.
Flipz77 said:
Don't think it does, since the receiving coils for wireless charging are located just behind the glass back.
Click to expand...
Click to collapse
The battery will charge with a NCF Charger
Major Issue Google
This "Nexus SOD" issue is showing up on many sites across the Internet. I have multiple "Nexus" devices including 2 Nexus 4, 1 Nexus 5, 2 "Nexus 7 2013". It suddenly started out of the blue with one of my Nexus 4 phones. Symptoms included rapid battery discharge. I am using Lollipop 5.1 on all devices. There are many claims as to the cause, Hardware Motherboard, Power Button etc. Others claim it is "Software Related" or App Related. The problem effects Nexus 4 and Nexus 5 phones. I have ordered a new motherboard for my nexus 4 device and see if that makes a difference.
This problem should warrant a "Major Android Lollipop Crisis Team" by Google to investigate the cause and let us know what it is and what Google is doing to solve the problem before moving to announce "Android M". This issue needs to brought up and actively pursued at the upcoming "Google I/O Conference" by the strong Android Developers Groups to press for "Formal Action"
charging method
Cracken6 said:
I have tried that many times. Nothing. It's bootloader screen, but I can't get there. Nothing happens. If I keep holding volume down+power it just keep blinking once every ~10 seconds, same if I hold just power button. If phone is not connected to charger, there are no blinks at all.
Click to expand...
Click to collapse
I had this problem a long time ago and my fix worked for me after doing a little research it seems like this is a case called battery total discharge. The fix was simply to charge your phone using the wall adapter that came with your phone (I still use my old apple cube wall thing) and to wait for the red light to appear then wait about ten minutes before trying to reboot.
I just got new battery . But it looks the same.. phone doesn't boot up.. same red light blinks once.. so.. its my phone is dead? I can't believe that...
When I connect to PC usb, there are unrecognized deviced called "QHSUSB_DLOAD".
Maybe this video will help you: Oh I´m not allowed to post links until now.
Just search for: - Nexus 4 "red light of death" fix - at youtube.
Hope it will help
AndRe5575 said:
Maybe this video will help you: Oh I´m not allowed to post links until now.
Just search for: - Nexus 4 "red light of death" fix - at youtube.
Hope it will help
Click to expand...
Click to collapse
I have checked all kind of videos there. Also that one. Most of these cases are related to battery, but it seems in my case it isn't. I just searched for QHSUSB_DLOAD unrecognized device, all posts says it means phone is bricked... But cmon, how? I installed CM12, successfully, without any errors, then just restarted phone, and its dead...
Cracken6 said:
I have checked all kind of videos there. Also that one. Most of these cases are related to battery, but it seems in my case it isn't. I just searched for QHSUSB_DLOAD unrecognized device, all posts says it means phone is bricked... But cmon, how? I installed CM12, successfully, without any errors, then just restarted phone, and its dead...
Click to expand...
Click to collapse
Did u try booting the phone without battery by connecting to wall charger and what about flashing stock ROM via PC
Also check that the power button works
This case should be solved
as9333 said:
Did u try booting the phone without battery by connecting to wall charger and what about flashing stock ROM via PC
Also check that the power button works
This case should be solved
Click to expand...
Click to collapse
Just tried booting without battery, and connecting to wall. Same - red light blinks once, after I hold Power button or Power+Volume down for about 15 seconds. If I keep buttons pressed, it just repeats every ~15 seconds.
Power buttons works fine.
After I checked that Device manager thing in google.. it looks very bad.. phone is dead.. probably need to change motherboard. I am just shocked, how this could happen... I didn't receive any errors during CM12 installation. Phone just instantly died after restart.

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
Click to expand...
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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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.
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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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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.
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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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