Develop Bugs

Random reboots regardless of stock or rooted/ROM status - battery / rogue app prob?

Hey guys,
My mom's GSM S2 has been randomly rebooting, and she insists that its when she 'bumps' the phone in her pocket while walking around listening to music.
I suggested it may be a problem with the music player, but after fiddling with it, I noticed it sometimes rebooted without music playing either.
She said she felt like a change anyway, and asked me to root her phone, and I suggested installing an ICS ROM as well.
I rooted the phone and loaded Resurrection Remix for her, but the problem persists.
She says she has never seen the phone reboot 'on its own' (i.e. sitting on the table untouched). Its usually after taking it out of her bag, or while its in her pocket.. etc
I thought it may be a rogue app, but the problem seems too related to physical movement, which made me suspect the battery. I have checked it, and it seems to be seated pretty securely to me, but who knows..
Any thoughts?

Sometimes a faulty or old battery can cause such issues by not maintaining a constant flow of energy at the correct voltage (usually too low).
Try replacing the battery and see if the problems persist. If they do then perform an RUU to get everything 100% stock and then send it to Samsung for repair (assuming its under warrenty still?)
Edit: sorry I did somewhat forget what you said about it being related to movement. If that is definitely the case it could be a loose connection inside the phone. In which case a new battery would be unlikely to help and you would probably be better just sending it to Samsung for repair.
Sent from my Nexus One using Tapatalk 2 Beta-4

Just did a quick test.. tried forcing a reboot by bumping and shaking the phone.. no luck. Maybe the problem isn't as related to movement as I thought.
Perhaps you're on to something with the faulty battery hypothesis, will try test with a different battery!
edit: just managed to cause the phone to reboot by removing the back cover

galaxy s4 randomly shut off???

I've been using my s4 for about 10 days. everything's fine but it has happened like 3 times the phone just shut off itself without me touching it. it's in my pocket, and i was using it like 5mins ago, then when i take it out i found it's totally off already.
the battery had enough juice at the time and the phone didn't feel too warm either. i totally have no clue why this happened. anyone here is experiencing the same thing with your s4? :crying:
for the first two time i can just press and hold the power button to turn it back on. but today when it happened the third time, the press and hold didn't work until i took out the battery and put it back. when it's on, the battery still had like 70% power.
this is frustrating... should i contact t-mobile for an exchange?
p.s. i rooted the phone and from what i can recall, besides titanium backup i didn't install any new app that i didn't have on my old htc sensation. the sensation didn't have this random shutting down problem. (i don't think the titanium caused either).

It used to happen on my s2. But I change roms and it went away.
Change rom and see what happens.
If possiible go full stock for few days.
Otherwise return it.
Sent from my SGH-M919 using xda premium

I've had my phone since the 2nd. Not 1 error or reboot. I've also been running cm nightlies for the past week as well.
Sent from my SGH-M919 using Tapatalk 2

I actually have a problem when I'm on the Internet or doing other things. My phone just got stock on a blue screen and I can't do anything to get out of it. I hav3 to turn off my phone in order to ho back . It happens to me like 8 times since I got the phone im frustrating
..
One question did you install the flash player app from the web
Sent from my SGH-M919 using xda premium

i didn't install the adobe flash player, nor did i install a different rom. everything is stock. i fully factory reset the phone once and after that i even didn't disable or delete any bloat ware. but the random shutting down still happens... annoying

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Mine has done the same thing twice, first time assumed it was me (before the latest firmware upgrade which "improves stability") the second time it was in my pocket, took it out and it was off - thought battery was dead but tried to switch it on anyway and guess what, battery was 90%+
Have no idea why it shut off - stock rom, only "odd" app is Good for enterprise .
Could it be related to overheating in the pocket?
Anyone got any ideas?
W.

Happen to me and to some other Italian guys, too! In my case, the I9500 turn off itself, sometimes reboot itself, just now! Depends from the rom, I don't know why. One rom reboot it, try another rom and after a bit of second shutdown it. And always after tha the display go off
I9505 not, it had only the problem of the audio crackle, for now.

I am also having this issue , please if someone can help...
I am having an i9500 (octa core version) and running United Arab Emirates 2013 June 4.2.2 I9500XXUBMEA I9500OJVBMEA firmware (stock , no root) , frequently when the phone is locked it will shut down on it's own and I have to keep the power button held a bit longer than usual for it to start (like 20 seconds) , I do not want to root it because the company I bought it from is not that...good....so I am very afraid of sending it to their service department , please , any info/suggestions would be greatly appreciated

There is some update about this problem?
I have stock, randomly turns off, sometimes I have to take out the battery to turn the phone on.
It's the only problem I have with the S 4, for the rest is the perfect phone

nazzza said:
There is some update about this problem?
I have stock, randomly turns off, sometimes I have to take out the battery to turn the phone on.
It's the only problem I have with the S 4, for the rest is the perfect phone
Click to expand...
Click to collapse
It's a firmware issue as far as I could tell Good luck finding a good one , I gave up and traded my i9500 for a i9505.

I found out that if i put my phone in the loader it shuts off... Maybe battery problem..

test
test

Sutting itself down
Hi
My S4 is randomly shutting itself down when in my pocket, can you advise how to rectify this situation please?
Thanks

Ok so i may have isolated the cause. at least a physical one. I am an electrician, and i do a LOT of repetitive tasks so i love listening to music while i work. thats when i noticed a pattern to the problem. and this will blow your mind.
( I do not recommend you try this yourself unless you particularily like the sound of 700$ going SNAP)
i took my phone out of my pocket, and by pressing both thumbs on the center of the screen and physicaly bending the phone forward, ( Dont give me crap for this, im smarter than most and i understand limitations. I was impressed that this phone can bend nearly a full 1/8th of an inch!) i was able to replicate the problem.
My theory is, since samsung used a softer plastic for there entire frame, and since the phone is so thin, when ever id bend down, (Pulling pants tighter across my thigh with the phone facing my leg) it would bend and physicaly seperate the metal pins that contact the battery.
PS: just got home, DGAF about spelling right now. is it this hot for anyone else right now!? lol

Hellion_zk said:
Ok so i may have isolated the cause. at least a physical one. I am an electrician, and i do a LOT of repetitive tasks so i love listening to music while i work. thats when i noticed a pattern to the problem. and this will blow your mind.
( I do not recommend you try this yourself unless you particularily like the sound of 700$ going SNAP)
i took my phone out of my pocket, and by pressing both thumbs on the center of the screen and physicaly bending the phone forward, ( Dont give me crap for this, im smarter than most and i understand limitations. I was impressed that this phone can bend nearly a full 1/8th of an inch!) i was able to replicate the problem.
My theory is, since samsung used a softer plastic for there entire frame, and since the phone is so thin, when ever id bend down, (Pulling pants tighter across my thigh with the phone facing my leg) it would bend and physicaly seperate the metal pins that contact the battery.
PS: just got home, DGAF about spelling right now. is it this hot for anyone else right now!? lol
Click to expand...
Click to collapse
I've been running the GT-I9505G play edition phone for the last month and only in the last week has the phone began to reboot on its own. What's strange about it is it usually happens when I'm not using the phone. I've seen it reboot maybe a dozen times over the last week. The phone always reboots and doesn't just turn off.
I'm going to see if factory reset takes care of the problem, if not I guess back to Google for a retread...
Thanks B

Yes I do a lot of bending down and I always have my body in awkward angles while working on the flight line and I used to have the same exact problem at work. I always thought that my S4's shutting off was due to the tiny half a mm gap between the bottom of my 7500mAh ZeroLemon Extended Battery and the bottom of the phone's battery slot, in-turn causing the battery to move inside my S4 and make the battery disconnect from the pins. I noticed a tiny gap in the fitting of the battery to the phone and that the battery was never really snug as much as it was with the 3500mAh Anker Extended Battery for my S3; it's really easy to remove the ZeroLemon battery and thought the battery shouldn't be easy to remove.
So I figured it was either the gap causing it to shut off or my movements somehow causing the power button to be pushed while it was in my pocket. I had a feeling it couldn't be the latter though because the thigh-located cargo/map pockets of my ABU's are a bit too large to not have enough room in the pocket for the power button to be pushed. I ended up solving my shutting off problem by cutting a very small piece of thick, durable paper the length of the S4's battery slot and I used the paper as a shim between the bottom edge of the ZeroLemon battery and my S4's battery slot to close the miniscule gap. Since I did used a thick piece of paper as a shim, I've yet to get any sudden shut-off's... even with the amount of times I bend down and move in ways that would cause it to shut off.
Sent from my SGH-M919 using xda premium

I just recently have same issues, it is turning off while the battery is not dead! i have tries to reset the factory setting but it dose not help at all.
what frustrated that Samsung mobile costumer services in UK is not helping much!!!
any help please

if your phone shuts off and than you try to restart it and the battery is a lot lower than before than your battery is broken

I get exactly what you describe, only takes a slight bend to shutdown. doesn't do it with the back cover off, without the cover the battery moves out slightly and the phone stays on.
Hellion_zk said:
Ok so i may have isolated the cause. at least a physical one. I am an electrician, and i do a LOT of repetitive tasks so i love listening to music while i work. thats when i noticed a pattern to the problem. and this will blow your mind.
( I do not recommend you try this yourself unless you particularily like the sound of 700$ going SNAP)
i took my phone out of my pocket, and by pressing both thumbs on the center of the screen and physicaly bending the phone forward, ( Dont give me crap for this, im smarter than most and i understand limitations. I was impressed that this phone can bend nearly a full 1/8th of an inch!) i was able to replicate the problem.
My theory is, since samsung used a softer plastic for there entire frame, and since the phone is so thin, when ever id bend down, (Pulling pants tighter across my thigh with the phone facing my leg) it would bend and physicaly seperate the metal pins that contact the battery.
PS: just got home, DGAF about spelling right now. is it this hot for anyone else right now!? lol
Click to expand...
Click to collapse

[Q] Tab Pro 12.2: Screen and Button Issues

I just got this tablet (to replace the garbage SGH-I467) a few days ago (Thu., May 15th). For the first couple of days it worked like a dream. However, the last 4 nights/3 days, I have been encountering some strange issues. What I will do here is describe the issues I've been having, what I have done in attempts to fix them, list some of the things I think may have caused it, and include any additional info/questions.
Before all that though, I would like to mention that I am not a developer, but I am a bit 'tech savvy' and am more familiar with/knowledgeable of technology than the average user. Also, I have spoken with Samsung tech support and even had the support guy access my Tab Pro 12.2 remotely (I will explain what I learned from that below). So, without further ado (I apologize in advance for the long winded nature of this post, but I want detailed):
The Issues:
1) Screen "flickering"—By flickering I mean that it is shutting off and turning on rather rapidly and sporadically, though inconsistently.
I first encountered the problem 3 days ago (the 18th).
Four nights ago (the 17th), before going to bed, I plugged the device into the same outlet I have used for all my mobile devices, when I woke up (on the 18th) the screen was doing exactly what I described. I hit the home button a few times and it stopped.
That night (the 18th) I plugged it back in to the usual spot before going to bed. The next morning (yesterday, the 19th), the screen was "flickering" again. I tried to press the home key a few times, as well as both the soft keys, nothing. In between "flickers" you can see the lock screen, where I have to enter a pin, but even while visible I can't type anything. So this time, to try to solve the problem, I held the power button + volume up to get to recovery and wiped the cache partition, rebooted the device, and viola, it worked again. Thinking that I may have to factory reset the device if the problem persists, I used Kies to backup all my data. I used the tablet the rest of the day, even plugged it in (in a different outlet than the one next to my bed) for a while and had no issues.
Last night (the 19th) I did pretty much the same thing, but this time, thinking that it might be an issue with the device getting too much power (the Quick Start Guide says: "Note: Connecting the travel adapter improperly may cause serious damage to the device."), I used a travel adapter from one of my other, USB 2.0 devices (the only difference between the adapters is the output: 2.0 = 5.0V—2.0A vs. 3.0 = 5.3V—2.0A, and output was specifically what I was concerned with). This morning (the 20th) the problem has returned, but now includes my second issue: the hard home button and both soft keys, back and recent apps, no longer function. So I immediately tried to wipe the cache partition and reboot, but this time it didn't work. Thankfully I had anticipated this yesterday and had that Kies backup, so I wiped the entire device back to factory settings. But alas, it was unsuccessful and the problem persists, including the loss of button functionality, with the exception of the power and volume buttons.
It is important to note that when I first got the Tab Pro 12.2 and set up the lock screen, I used the option that delays the actual locking of the device 10 minutes after screen timeout, but set it so that if I lock the screen with the power button it ISN'T delayed and immediately locks. That being said, a couple of times when the "flickering" stopped long enough to momentarily use the device, I was able to enter my pin and unlock. But when the screen starts flickering again, it locks the device, so the power button must be affected as well. Though since the first factory reset of the device, I haven't set up a pin. I have done several factory resets and none of them have worked. The best result has simply been limited (no back, recent apps or home key) and momentary functionality. I tried using Kies to do emergency firmware recovery, but every time I click the option it disconnects the device.
When Samsung tech support remotely accessed by device (I used one of the momentary functionality windows to download the required application) the agent was able to utilized soft and home key functionality, even though I couldn't. This tells me that it was hardware related, not related to UI/software.
So there are a couple of things I think may have caused/contributed to the problem:
The first, which I vaguely touched on above, is the power issue. Perhaps I have shorted the device out somehow. The outlet I use to charge things while I'm sleeping is on the wall behind my bed, so I have to use a common extension cord, one that has 3 outlets at the end. I have a light plugged into that and in the past have charged both my SGH-I467 (AT&T Note 8.0) and my SGH-I747 (AT&T S4 Active) with that cord and outlet. That is the only place I have charged the SM-T900 overnight, but none of the other power sources I have used have caused these issues.
The second possibility is a virus some sort. I have never used the Samsung app store on any of my other devices, but in order to update the Hancom Office suite I had to. Since I had an enjoyable time using it to that end, I decided to see what else I could find on Samsung's store. I downloaded a couple of things (the "Official Captain America game" and a couple wallpaper/theme apps) and was looking around the store to see if there was anything else I wanted to download. I found several apps that had reviews claiming they were trojans, so I immediately checked the reviews for the apps I had downloaded, but none of them had similar reviews. However, that does not mean they didn't have viruses.
So, what do the resident Android gurus of XDA think about these issues?
I tried searching all over the forums and elsewhere online for people having the same issues, but couldn't find anything. Have any of you ever encountered something similar to this?
Until recently, I hadn't ever heard of anyone getting a virus on an Android device. Are they common? What is the nature of Android viruses?
If these issues do have something to do with overcharging/shorting the device, how can I mitigate that problem? Tonight when I charge the tablet, instead of using the USB 3.0 charging cable, I am going to try just using the 2.0 cable. As I understand it, that can be done by simply plugging it into the right side of the port. Hopefully that will stop exacerbating the problem.
Again, I apologize for such a long winded post. I would like to thank you all in advance. If ever I have problems with an Android, you guys are the ones to ask!
*UPDATE* Before I started typing this I was attempting to run the Kies 'Firmware Upgrade and Initialization', as opposed to 'Emergency Firmware Recovery', to see if that too would disconnect the device. Unfortunately it said that my device needed to be charged first. So I shut it down and plugged it into a surge protected strip and began typing this post. Occasionally I would go over an check the charge. While it was shut down and charging I was able to use the home key to bring up the green battery. Once the charge looked like it was about 75% complete I turned it back on and lo and behold, the "flickering" issue looks resolved and so does the button issue. I can go back, enter the recent apps and task manager, and use the home key functions. For how long this will last, however, is unknown. I guess we'll see in the morning. I'll post what happens tomorrow.

What kind of case are you using? Some users have seen issues with some cases that use magnets for auto-sleep-wake. When the front of the cover is flipped back behind the tablet, the magnets seem to activate the auto-sleep feature
Sent from my SM-P900 using Tapatalk

RE: Case?
dodo99x said:
What kind of case are you using? Some users have seen issues with some cases that use magnets for auto-sleep-wake. When the front of the cover is flipped back behind the tablet, the magnets seem to activate the auto-sleep feature
Sent from my SM-P900 using Tapatalk
Click to expand...
Click to collapse
I am not using a case or cover at all...

same issues here
Sounds exactly as the same issue I have had the last week. I have done several factory resets triad to avoid installing as many applications as I had prior the factory reset (to see If it was an app causing the issue). No solution yet but I will try your way with kies described above. I have a tab pro 8.4.

VeinkWiles said:
So, what do the resident Android gurus of XDA think about these issues?
Click to expand...
Click to collapse
I am no guru, but it sounds like a loose connection. Maybe it is affected by temperature. Try it on a (not too) hot water bottle or on freezer packs.

Mike Austin said:
I am no guru, but it sounds like a loose connection. Maybe it is affected by temperature. Try it on a (not too) hot water bottle or on freezer packs.
Click to expand...
Click to collapse
It's not overheating. It can get warm, but it's never gotten hot. And I've had other devices that have seriously overheated and still functioned, albeit slowly.
**UPDATE**
After I got it working the night I originally posted I let it fully charge (it's important to note that I got it up to about 75% while it was off; green battery the only thing on the screen, and I had home button functionality), then disconnected it and disabled all the radios, put it in power saving and left it over night without power. Doing that I was able to use it all day yesterday. But while I was full-charging it, after it reached 100%, I noticed that it started acting up almost immediately. The sound was on and kept making the lock screen sound (that's how I noticed it from across the room). So it is tied to the power/lock key. But disconnecting it before it could get out of control mitigated the problem. Last night I was going to try to charge it over night with USB 2.0, but I fell asleep before changing the cable out, so it charged on 3.0 all night and is back in poor repair. I'm currently trying to full charge it while off to see if that gives me functionality again.
Either way, each time I fix it the solution becomes more difficult/timely than the previous one. It's clearly not getting better, so I'm going to have to send it in to repairs.
Sent from my SAMSUNG-SGH-I537

VeinkWiles said:
It's not overheating. It can get warm, but it's never gotten hot. And I've had other devices that have seriously overheated and still functioned, albeit slowly.
**UPDATE**
After I got it working the night I originally posted I let it fully charge (it's important to note that I got it up to about 75% while it was off; green battery the only thing on the screen, and I had home button functionality), then disconnected it and disabled all the radios, put it in power saving and left it over night without power. Doing that I was able to use it all day yesterday. But while I was full-charging it, after it reached 100%, I noticed that it started acting up almost immediately. The sound was on and kept making the lock screen sound (that's how I noticed it from across the room). So it is tied to the power/lock key. But disconnecting it before it could get out of control mitigated the problem. Last night I was going to try to charge it over night with USB 2.0, but I fell asleep before changing the cable out, so it charged on 3.0 all night and is back in poor repair. I'm currently trying to full charge it while off to see if that gives me functionality again.
Either way, each time I fix it the solution becomes more difficult/timely than the previous one. It's clearly not getting better, so I'm going to have to send it in to repairs.
Sent from my SAMSUNG-SGH-I537
Click to expand...
Click to collapse
Sorta sounds like a screen grounding problem. I had a nexus seven with this issue and the charger seemed to really make it act up. Needless to say I gave that to my wife and bought this. If the digitizer is not grounded properly it will act up.
Turning on developer settings and set it to show touches on screen. See if when charging the screen registers more touches than you are doing.
Sent from my SM-T320 using Tapatalk

Re: developer settings; display touches
dottat said:
Sorta sounds like a screen grounding problem. I had a nexus seven with this issue and the charger seemed to really make it act up. Needless to say I gave that to my wife and bought this. If the digitizer is not grounded properly it will act up.
Turning on developer settings and set it to show touches on screen. See if when charging the screen registers more touches than you are doing.
Sent from my SM-T320 using Tapatalk
Click to expand...
Click to collapse
Damn! That's an outstanding idea! The only downside is that last night I sent the tablet to Samsung's repair department, so I can't test that out. But once I get it back, if the problem persists I will definitely be doing that first. Thanks for the advice dottat.

Fw:Re: developer settings; display touches
mikegbg said:
Sounds exactly as the same issue I have had the last week. I have done several factory resets triad to avoid installing as many applications as I had prior the factory reset (to see If it was an app causing the issue). No solution yet but I will try your way with kies described above. I have a tab pro 8.4.
Click to expand...
Click to collapse
Hey dude, check out dottat's reply. He's got a really good idea that may shed some light on the source of the problem. Unfortunately, I can't try it out. If you do it, let me know how it goes. Maybe you can take some screenshots? Either way, hopefully you can get something out of it.

tab gets flickering screen and reboots

I dropped by tablet battery down once and now every so often the screen flickers with vertical lines and this is followed by loss of network and the thing reboots.
I've read this to be a battery problem.
Warranty is still active but I've rooted it and my Knox counter has gone up.
What do you think XDA? Just get a replacement battery?

NightShadow02 said:
I dropped by tablet battery down once and now every so often the screen flickers with vertical lines and this is followed by loss of network and the thing reboots.
I've read this to be a battery problem.
Warranty is still active but I've rooted it and my Knox counter has gone up.
What do you think XDA? Just get a replacement battery?
Click to expand...
Click to collapse
If you have the ability, since it was dropped, I would open it and make sure connection is tight to battery and screen. Then if it still acts up, get a battery. Several people had battery issues out of the box. All it turned out to be for a few was a loose connection.

i was thinking about that but i'm afraid of voiding warranty. do i even still have warranty? due to the knox?

flhthemi said:
If you have the ability, since it was dropped, I would open it and make sure connection is tight to battery and screen. Then if it still acts up, get a battery. Several people had battery issues out of the box. All it turned out to be for a few was a loose connection.
Click to expand...
Click to collapse
Well ive opened it up and tightened everything i can see and it seems to work ok for a while, when the charge gets to around 20-30%, the tablet flickers, all mobile connections are lost and 75% of the time, reboots.
So i went ahead and got a new battery. Now this was worse kinda. At random moments, like unlocking the screen, or replying to a message, or maybe just a high cpu load event, the tablet just turns off and is unable to be powered back on without first connecting it to a power supply like a wall charger or a power bank.
The time and date will be reset once its back on and ill have to wait a few minutes before the auto network time setting kicks in before i can use something like whatsapp.
Anyone got any clue what might be causing this problem? Thanks in advance, helpful xdarians.

NightShadow02 said:
Well ive opened it up and tightened everything i can see and it seems to work ok for a while, when the charge gets to around 20-30%, the tablet flickers, all mobile connections are lost and 75% of the time, reboots.
So i went ahead and got a new battery. Now this was worse kinda. At random moments, like unlocking the screen, or replying to a message, or maybe just a high cpu load event, the tablet just turns off and is unable to be powered back on without first connecting it to a power supply like a wall charger or a power bank.
The time and date will be reset once its back on and ill have to wait a few minutes before the auto network time setting kicks in before i can use something like whatsapp.
Anyone got any clue what might be causing this problem? Thanks in advance, helpful xdarians.
Click to expand...
Click to collapse
I'm not by any means an expert or repairman of any kind, just so you know. I'm thinking maybe a loose connection at the terminals on the board the battery connects to or if they use a separate board for the battery to connect to and then to the main board it may be somewhere along in there. Maybe a loose wire going into the tab that connects to the prongs. It sure sounds like something isn't making a good connection. Sounds like a load gets put on it and it and that bad connection can't handle the load.
Might just be you're going to have to send it off...

You may be right. Sounds like a particular connection which does higher load or something. Once i put the tablet in power save mode, the symptoms never reappeared. I dont notice a drastic slowdown in the tablet either. Probably am prolonging the inevitable.

Same Symptoms
NightShadow02 said:
You may be right. Sounds like a particular connection which does higher load or something. Once i put the tablet in power save mode, the symptoms never reappeared. I dont notice a drastic slowdown in the tablet either. Probably am prolonging the inevitable.
Click to expand...
Click to collapse
I am facing exactly same issue what you have described and am in same situation, have tripped Knox on my Tab S 8.4.
I can see that you have been able to suppress the behavior by putting it to Power Saving mode. Have you experienced flicker and reboot since then? I am planning to take it to Samsung store not sure if they will honor warranty, did you tried that?

misrasandeep said:
I am facing exactly same issue what you have described and am in same situation, have tripped Knox on my Tab S 8.4.
I can see that you have been able to suppress the behavior by putting it to Power Saving mode. Have you experienced flicker and reboot since then? I am planning to take it to Samsung store not sure if they will honor warranty, did you tried that?
Click to expand...
Click to collapse
nope, ever since the Power Saving mode solution, it hasnt flickered and rebooted yet. and my warranty was expired by that point so i didnt bring it to the shop. no noticable reduction in performance so far

possible battery connector
NightShadow02 said:
Well ive opened it up and tightened everything i can see and it seems to work ok for a while, when the charge gets to around 20-30%, the tablet flickers, all mobile connections are lost and 75% of the time, reboots.
So i went ahead and got a new battery. Now this was worse kinda. At random moments, like unlocking the screen, or replying to a message, or maybe just a high cpu load event, the tablet just turns off and is unable to be powered back on without first connecting it to a power supply like a wall charger or a power bank.
The time and date will be reset once its back on and ill have to wait a few minutes before the auto network time setting kicks in before i can use something like whatsapp.
Anyone got any clue what might be causing this problem? Thanks in advance, helpful xdarians.
Click to expand...
Click to collapse
I have seen this problems on 2 tablets 10.5 and 8.4 the connector where battery is connected on motherboard gets loose which causes reboots and flicker
Solution in my case was resoldering that connector again

i had the same problem, opened up my tablet, just disconnected the battery, cleaned the contacts, pushed it back, made sure its nice and snug, put it all back together and now battery doesn't drain as fast, no more flickers and reboots!

hmm. i'll have to give it a try. you think this may be something to do with condensation?

Sorry for the bump, but I'm having this issue as well on my S 8.4. Custom ROM. The thing with me is that it's not consistent. One day, it will do it a few times; others, no issues whatsoever. I'll try the suggested if it gets progressively worse.

Hey guys,
Unfortunately our home's tablet (Tab s 8.4 Wifi) has the same problem.
It never did weird whatshowever, but when I flashed a custom rom (which went perfectly smooth actually) the screen flashes and the tablet reboots sometimes.
Now it weird that this never happened before and only when I flashed a custom rom it began showing this behaviour.
I am affraid of opening this tablet, and I guess because of the custom rom there is no warranty left anymore (or can this be bypassed by some terminal trick?)
Also I question myself if this is not a software issue, and that it can be fixed with software or so?
Thanks for answering!

My Fix
Hey Guys!
I might have some surprising news to tell about this "issue".
I saw some unboxing video's and saw at what place the battery connector was placed. It was some sort of a 'push to click' system.
So what I did was the following:
I pushed the tablet at the place of the battery connector. I tried this at various places until I heard a *click*.
Now I don't have this issue anymore. Jay!
I hope this will help you too!

I started to have the same issue on a Tab Pro 12.2, presumably after the battery has lost considerable amount of its energy. Normally I remember this tablet to have a dazzling 10+ hours of usage time. Just after some serious usage time of more than 2 years this issue started, along with increasing temperature and finally reboot. From time to time Android gave a warning message about overheating. From time to time charge values drop big values at a time. From 45 to 20 or 80 to 50. Seems arbitrary. This was happening even when I was on stock, then I switched to some Android 6 stock port from some other tablet. Still the same.
I believe the battery needs replacement. (That's obvious after 18 months, I just mean blinking is related to this) Hope I can find a high quality one cause there are several garbage batteries.

Randomly turning off after lock.

Hello, recently I've noticed that sometimes my phone Is turned off after pulling it out of my pocket. It never seems to crash during use so I have to hold the power button to turn it on when I pull it out of my pocket.
This happened on the latest official MIUI which prompted me to unlock the phone and install Pixel (to see if it was a ROM issue).
So now I'm on a clean install of the latest pixel ROM and it still happens (maybe once a day).
I've tried uninstalling all apps which I think may have an effect. I don't remember ever dropping my phone or damaging it so what else could it be?
- can I reset the battery?
- is there any way I can track what my phone is doing so I can see what was happening before the phone powered off?
I bought it off AliExpress so I doubt I can fix it under warranty (especially now it's unlocked).
Many thanks

I literally came here to post something along these lines, my phone started randomly shutting down just today, and it happened like 10 times already. Just like you it mostly happens in deep sleep/when it's in standby but I've noticed it shutting down while I was using it too. I'm running Aosip Pie's 270119 build.

Matt17BR said:
I literally came here to post something along these lines, my phone started randomly shutting down just today, and it happened like 10 times already. Just like you it mostly happens in deep sleep/when it's in standby but I've noticed it shutting down while I was using it too. I'm running Aosip Pie's 270119 build.
Click to expand...
Click to collapse
Just had it happen twice last night. Literally done nothing to warrant it.
I'm wondering if I need to replace the battery at this point.

Urgh, happened again tonight. I have absolutely no idea what could be causing this

Crosshash said:
Urgh, happened again tonight. I have absolutely no idea what could be causing this
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Click to collapse
Maybe it's the battery's fault. Why don't you take it to service center and tell them that your device shuts down after some time.

Ordered a replacement battery so we'll see if that fixes it. Seemed to be fine the last couple of days but tonight in town it turned off about 5 times by itself; I wonder if GPS has something to do with it.
[edit] regarding the service centre, I ordered the phone to the UK from Aliexpress so I don't have any warranty. Replacing the battery is probably my last shot at salvaging this issue.

Just to also add, it seems to just be random shutting down now; it turned off during use (not after lock) last night too.

Same here. If anyone knows a fix, please share. Started today.

Mine turns off when as soon as I turned on then when I turned on again it turns on normally.Why?

I have the same issue but I've found a solutions.
Just I open my phone and I place a little peace of paper to block the connector of the battery.
The problem is the connector are not correctly attached.
Hope that help you me it's good a long 1month after 5 months of sheet.