N5 turns off with no warning or error - Nexus 5 Q&A, Help & Troubleshooting

Hi ! Since 4-5 days, my Nexus 5 randomly turns off with no warning.
Any idea where to start troubleshooting ? I'm clueless.
The only hint i got is, that it seems that the turning off happened at roughly same time.
I cannot turn on the phone if it happens, it boots but turns off immediately.
Could this be battery related ? I noticed today that after pluggin in the phone to use 'adb logcat', the phone booted and showed only 8% battery, but before the phone turned off, the battery was at 60-70%.

After the powers itself off, connect it to a charger to see if the led flashes red. If it does flash red, the battery is completely depleted.
It sounds like a battery problem if it happens on a stock ROM.

Related

[Q] Battery Refresh/Shutdown

Hi all,
i've got a normal nexus s, not rooted or anything, its running 2.3.2 as i haven't had the OTA yet. However strange things have started happening this week with regards to my battery.
I can no longer shutdown the phone whilst its plugged in, it goes through the motions, vibrates and then just hangs on the dimmed screen with shutdown on it. when i unplug the cable, it switches off. However, when i then plug the cable in, it starts up the phone, instead of just charging when switched off with that white battery meter.
It has also stopped recognising that it has been plugged in on the battery use info screen, so it is saying that i have been on battery power for almost 6 days now.
Its not a dealbreaker for me, but i haven't tinkered with anything, and its just plain annoying. I'm starting to think its just shizzle samsung hardware. Anyone any ideas? Or same thing happened? Cheers.

[Q] [Help] Phone won't turn on

So I am at work and I charged my phone fully, then I unplugged it and put it in the drawer at my desk. I have pulled it out a couple of times for random things, but put it back in the drawer. I just heard it vibrate and assumed I got a text, but I opened it up and when I pulled out the phone it was warm, like I had been using intensively, but I haven't touched it for probably an hour or more. I tried to turn it on, but the screen is just black. The phone has shut itself off. Tried turning back on, screen stayed completely black, didn't turn on backlight or anything, and just vibrated quickly then stopped. If I hold down the power button it will vibrate about once every four seconds. Battery pulled, tried again. Same result.
Currently running Paranoid Android 1.9.5a Everything has been working fine, so I don't know what could have caused this. Seems like maybe some rogue app started eating all the battery and the phone is just out of juice? Something must have been running though to cause the heat... I tried plugging it in to charge, but the same result, no activity on the screen, but it vibrates once every few seconds. Any help is really appreciated. Thanks.
EDIT
Let the phone sit for a few minutes to cool down. Tried turning on again and it booted up into recovery. I selected to reboot. Everything went normally, booted through K-exec, got to the main screen only to be greeted with a battery warning 0% battery left then immediately turned off. The phone was unplugged for MAYBE 4 hours, most of the time just doing nothing (that I knew of) So something must have been eating away at the battery like crazy that I didn't realize for the past couple of hours. Any ideas guys?
Zool4nd3r said:
So I am at work and I charged my phone fully, then I unplugged it and put it in the drawer at my desk. I have pulled it out a couple of times for random things, but put it back in the drawer. I just heard it vibrate and assumed I got a text, but I opened it up and when I pulled out the phone it was warm, like I had been using intensively, but I haven't touched it for probably an hour or more. I tried to turn it on, but the screen is just black. The phone has shut itself off. Tried turning back on, screen stayed completely black, didn't turn on backlight or anything, and just vibrated quickly then stopped. If I hold down the power button it will vibrate about once every four seconds. Battery pulled, tried again. Same result.
Currently running Paranoid Android 1.9.5a Everything has been working fine, so I don't know what could have caused this. Seems like maybe some rogue app started eating all the battery and the phone is just out of juice? Something must have been running though to cause the heat... I tried plugging it in to charge, but the same result, no activity on the screen, but it vibrates once every few seconds. Any help is really appreciated. Thanks.
EDIT
Let the phone sit for a few minutes to cool down. Tried turning on again and it booted up into recovery. I selected to reboot. Everything went normally, booted through K-exec, got to the main screen only to be greeted with a battery warning 0% battery left then immediately turned off. The phone was unplugged for MAYBE 4 hours, most of the time just doing nothing (that I knew of) So something must have been eating away at the battery like crazy that I didn't realize for the past couple of hours. Any ideas guys?
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Click to collapse
I'm having the same problem

[Q] Phone Died -- Won't turn on now.

I am rooted and my Verizon GS3 will not turn on. Not sure what happened. It was not due to flashing because I hadn't flashed a rom; I noticed my phone was off so I plugged it in and went back to it in about an hour and it still would not turn on.
I tried pulling the battery. When I plug the phone in with the battery in it vibrates and then the battery screen comes on but immediately disappears (the red power LED is never on either). If I pull the battery out while the phone is still plugged in the red power LED flashes on and then off.
If I plug the phone in with no battery the red power LED comes on for about 2 seconds and the phone vibrates; the LED goes off but then nothing shows on the screen.
Is this a brick? What can I do? I am going to charge the phone overnight and see if it turns on in the morning.
Thank you in advance.
Fixed
Sent from my SCH-I535 using Tapatalk 2

s6 dead and not charging, screen black....any chance to recover it?

Hello all,
on friday night my Samsung S6 Duos just died and it seems I'm not able to revive it...
it was running out of charge (was at 5-10% battery)...then suddenly the screen went black and the red led was blinking every second or so...
I thought it was just hung like it happened sometimes, so I tried to reset it pressing vol down+power or home+power buttons, but nothing happened....screen still black and red led flashing....
so I thought it was some kind of battery problem...tried to recharge but nothing changed...no battery icon on screen and red led flashing (not solid as when it is charging...)...
so, since battery cannot be pulled off I waited till complete discharge hoping that would reset it....waited till led was not flashing anymore, then I tried to recharge but nothing is happening....led not becoming red as when it's charing, nor display is showing battery charging....
actually nothing happens, I've tried to leave it charging several hours, both with power cord and with wireless charget, but it just doesn't charge and doesn't power up anymore...also tried to connect it to PC but nothing happens...
do you think that opening it and trying to disconnect and reconnect battery could solve? or maybe changing battery?
or is it probably a fault in the motherboard?
I just want to recover photos and other data saved on its memory but if it's motherborard issue I think everything's lost...right? 'cause memory chips are on it...or am I wrong?
thanks for any hints or suggestions on how to recover if possible...

Nexus 5 won't boot, 8 blinks

I have never had any problem with my Nexus 5. It is now my standby device. Accordingly it doesn't get used much. One day I left it ON and didn't use it for 2 weeks. When I picked it up again it was OFF and didn't want to turn on. Naturally I thought the battery had drained and put it to charge.
Instead of the battery symbol on the screen (indicating it is being charged), I get a sequence of 8 red blinks on the bottom notification light (which is just above the charging port), each blink lasting 0.5 seconds, then 0.5 seconds off (so total duration of blinking sequence is 8 seconds), then 1.5 seconds off, then blinking sequence starts again.
I left it connected to the charger for 2 weeks. Nothing changed.
I then replaced the battery with a brand new OEM battery, same thing again.
I cannot get into recovery mode nor is the phone recognised when I connect it to the PC.
Any ideas? Anyone knows the meaning of this blinking sequence?
nitonreu said:
I have never had any problem with my Nexus 5. It is now my standby device. Accordingly it doesn't get used much. One day I left it ON and didn't use it for 2 weeks. When I picked it up again it was OFF and didn't want to turn on. Naturally I thought the battery had drained and put it to charge.
Instead of the battery symbol on the screen (indicating it is being charged), I get a sequence of 8 red blinks on the bottom notification light (which is just above the charging port), each blink lasting 0.5 seconds, then 0.5 seconds off (so total duration of blinking sequence is 8 seconds), then 1.5 seconds off, then blinking sequence starts again.
I left it connected to the charger for 2 weeks. Nothing changed.
I then replaced the battery with a brand new OEM battery, same thing again.
I cannot get into recovery mode nor is the phone recognised when I connect it to the PC.
Any ideas? Anyone knows the meaning of this blinking sequence?
Click to expand...
Click to collapse
what is the current state of the phone? do you just get the blinking when charge cable connected? no boot loop ?
So currently the phone doesn't switch on and cannot be charged it would seem.
There is no bootloop.
And yes, the blinking only goes on whilst a charging lead is connected or whilst it's on a wireless charging cradle. No blinking when removed from the charger.
nitonreu said:
So currently the phone doesn't switch on and cannot be charged it would seem.
There is no bootloop.
And yes, the blinking only goes on whilst a charging lead is connected or whilst it's on a wireless charging cradle. No blinking when removed from the charger.
Click to expand...
Click to collapse
you said you replaced the battery , I would check that connection , try removing the battery if possible and reconnecting it. Try the old battery too if you still have .
In my experience i'v seen that blinking light in other devices when they overheat.
I only replaced the battery because of the blinking problem as I suspected a deep discharged battery. Anyway the connections are good. 100%.
I never had overheat issues on my N5 as it was just used for basic functions, no gaming etc. I wouldn't imagine the device had overheated while it was left unattended on my desk, and there definitely is no overheating happening now as it doesn't even switch on...
nitonreu said:
I only replaced the battery because of the blinking problem as I suspected a deep discharged battery. Anyway the connections are good. 100%.
I never had overheat issues on my N5 as it was just used for basic functions, no gaming etc. I wouldn't imagine the device had overheated while it was left unattended on my desk, and there definitely is no overheating happening now as it doesn't even switch on...
Click to expand...
Click to collapse
sounds like your hammerhead finally checked out ... the old saying goes " if you don't use it, you lose it " .... try all combinations like hold power and volume down at the same time for 10 seconds , power and volume up ..etc
other than that i'd take a multi meter and make absolute sure you have power to the motherboard , then if you still do, it could be a short ..
if you want to go even further, a complete tear down of the phone, check for corrosion ( whitish residue on terminals and motherboard ) clean off with toothbrush only ( no water or liquid of any kind ) be careful removing ribbon cables and re-inserting them ... you can find lots of stuff on youtube for that.
good luck

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