Develop Bugs

[Q] Prevent screen wake when plugging in to charge

Hi XDA,
Recently my phone has come up with a problem with the USB charging port where it thinks it is charging when it is not plugged in every few seconds. This causes the screen to wake every few seconds and then turn off to sleep, then re-awake again repetitively, draining the battery very quickly.
I'm not sure of any way to fix this problem except maybe send it back to the manufacturer for warranty and repair (which is difficult for me to do as I have already voided the warranty through rooting), or maybe buy a replacement USB port and try fix it myself. Does anyone know of any other simple and effective ways for me to fix this?
Aside from this, in the meantime I would like to know if there is any way I can prevent the screen from waking up when the phone thinks it is being charged, thus when the phone does its charging/not charging cycle, it doesn't wake up the screen every 15-20 seconds and so won't lead my battery to drain from this.
Any help would be greatly appreciated, thanks!

Unroot, and flash stock then lock bootloader?
Sent from my Galaxy Nexus using Tapatalk 2

dmarmstr said:
Unroot, and flash stock then lock bootloader?
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
Hey, thanks for the reply. Unfortunately I am a bit of a noob at this and am unsure where I should go/what I should do to unroot, flash stock and lock bootloader. I think that would have to be a last resort though, is there not some way I could fix it myself? Is it purely a hardware issue? Also, in the meantime is there a way to prevent the screen wake issue?
Thanks

When we told people not to use toolkits....
Well at least learn after using it, and not just click away and forget about learning.
/end of small rant
Try to push the connectors in your microusb port sightly up(screen facing the sky)
If not use this: http://forum.xda-developers.com/showpost.php?p=27945515&postcount=128
Pressed from my Maguro

Mach3.2 said:
Try to push the connectors in your microusb port sightly up(screen facing the sky)
Click to expand...
Click to collapse
Can you be a little more descriptive here, or post a pic of this? I'm having the exact same issue but don't want to mess up my phone any more than it is.
On a side note, I called Samsung this afternoon to inquire about getting the phone serviced and after he told me that unlocked phones don't come with a warranty (I bought mine that way), he actually said that they couldn't repair it anyway because unlocked phones are actually built differently and use different parts. To which I laughed. But anyway, I now need to find a way to fix this problem.
Thanks.

corboto said:
Can you be a little more descriptive here, or post a pic of this? I'm having the exact same issue but don't want to mess up my phone any more than it is.
On a side note, I called Samsung this afternoon to inquire about getting the phone serviced and after he told me that unlocked phones don't come with a warranty (I bought mine that way), he actually said that they couldn't repair it anyway because unlocked phones are actually built differently and use different parts. To which I laughed. But anyway, I now need to find a way to fix this problem.
Thanks.
Click to expand...
Click to collapse
I actually did this with the edge of a cardboard card, ever so slightly but so far the problem seems to have gone away. Not promising anything though, and is probably only a temporary solution. I think what happens is the contacts between the connector in the middle of the port comes slightly into contact with the bottom through wear and tear over time and they short each other out, so by pressing it up a bit you prevent that from happening.

If you know how to decompile/recompile apk's...
/system/framework/framework-res.apk can be decompiled...
Then under /res/values/bools.xml/ you can edit the line "unplugTurnsOnScreen" to false.
I don't see a "plug in" version...but maybe this does both?
Either way...it cuts the amount of screen wakes in half.
I wouldn't recommend doing this, however...I'd get it returned.
Your problem might only get worse.

Same problem here, did you find a solution for that?
bumluffa said:
Hi XDA,
Recently my phone has come up with a problem with the USB charging port where it thinks it is charging when it is not plugged in every few seconds. This causes the screen to wake every few seconds and then turn off to sleep, then re-awake again repetitively, draining the battery very quickly.
I'm not sure of any way to fix this problem except maybe send it back to the manufacturer for warranty and repair (which is difficult for me to do as I have already voided the warranty through rooting), or maybe buy a replacement USB port and try fix it myself. Does anyone know of any other simple and effective ways for me to fix this?
Aside from this, in the meantime I would like to know if there is any way I can prevent the screen from waking up when the phone thinks it is being charged, thus when the phone does its charging/not charging cycle, it doesn't wake up the screen every 15-20 seconds and so won't lead my battery to drain from this.
Any help would be greatly appreciated, thanks!
Click to expand...
Click to collapse

[Q] Graphics Issues + Crash while charging

Hello all!
I have noticed that recently, my phone has been doing a very odd thing while charging. When it has been plugged in for a little while, and the screen is on and in use, sometimes the phone will crash. When it crashes in this manner, the backlight on the screen is turned on on full brightness, the screen gets a yellowish hue, and horizontal black bars start appearing on the screen. More black bars keep appearing until I reset the phone (hold the power button), and then there is no evidence of any screen problems. I also generally have to unplug it for a while, as if this happens once, it generally happens multiple times until I unplug the phone and wait. These problems seem to be occurring at odd times (a lot at night, before I am going to sleep), and have just started happening (I also recently made the upgrade from the latest version of GB to 4.0.4). I have had this device for about a year now (the second device, the first one had a physical design flaw and was replaced), and I am out of warranty right now, so any help would be appreciated!

a_p3rson said:
Hello all!
I have noticed that recently, my phone has been doing a very odd thing while charging. When it has been plugged in for a little while, and the screen is on and in use, sometimes the phone will crash. When it crashes in this manner, the backlight on the screen is turned on on full brightness, the screen gets a yellowish hue, and horizontal black bars start appearing on the screen. More black bars keep appearing until I reset the phone (hold the power button), and then there is no evidence of any screen problems. I also generally have to unplug it for a while, as if this happens once, it generally happens multiple times until I unplug the phone and wait. These problems seem to be occurring at odd times (a lot at night, before I am going to sleep), and have just started happening (I also recently made the upgrade from the latest version of GB to 4.0.4). I have had this device for about a year now (the second device, the first one had a physical design flaw and was replaced), and I am out of warranty right now, so any help would be appreciated!
Click to expand...
Click to collapse
That was happening to me (for a weird reason, my devicewas new, its seems that problem is more common in the rogers version dont know why) but, if your problem is the same problem that i had, then, just install stock ICS with oneclick (dont remember the name very well)

lorddavid said:
That was happening to me (for a weird reason, my devicewas new, its seems that problem is more common in the rogers version dont know why) but, if your problem is the same problem that i had, then, just install stock ICS with oneclick (dont remember the name very well)
Click to expand...
Click to collapse
Superoneclick? That's the closest I found, and it doesn't say that it supports the Glide. And, I am running a fully stock version of 4.0.4, unrooted and everything. I might need a little more help here, haha.

I mean, oneclick, is the firmware,and is about 700 mb, give me amoment a will search it
EDit: i found it: http://www.androidauthority.com/captivate-glide-sgh-i927-att-android-4-0-4-ics-uclg9-leak-110365/
I use that, when I install it, that problem gone away, try it. And then, you can flash the custom recovery and install custom roms

lorddavid said:
I mean, oneclick, is the firmware,and is about 700 mb, give me amoment a will search it
EDit: i found it: http://www.androidauthority.com/captivate-glide-sgh-i927-att-android-4-0-4-ics-uclg9-leak-110365/
I use that, when I install it, that problem gone away, try it. And then, you can flash the custom recovery and install custom roms
Click to expand...
Click to collapse
Isn't that a different version though? The build number on that is UCLG9, not UCKJ3 (which is what I have right now).

I am not sure, but, if with that your problem persist, maybe is hardware, but I only do that. When I did it, that was the latest version, now there is another version but not sure what is it

I was having the same problem, except it was happening frequently after my phone had warmed up due to normal use. If the phone was already hot it wouldn't even get past the splash screen.
I put it down to hardware fault, and was successful in getting it replaced under warranty. The new one has been totally fine.
Hopefully yours isn't a hardware issue - but from how it sounds it very well could be

davidpartay said:
I was having the same problem, except it was happening frequently after my phone had warmed up due to normal use. If the phone was already hot it wouldn't even get past the splash screen.
I put it down to hardware fault, and was successful in getting it replaced under warranty. The new one has been totally fine.
Hopefully yours isn't a hardware issue - but from how it sounds it very well could be
Click to expand...
Click to collapse
I really was hoping it was a OS issue, as it hadn't ever done this on GB. If I flash a new rom then, it would be fixed?
Also, I too noticed that my phone is abnormally warm when it does this. I do have a cover on my phone, but I noticed that it seems to be centered about on the horizontal center of the phone, about a half-inch below the camera. If this is related, what do you think it is?

My phone did this as well. Luckily it happened just before I rooted. The att guys said it was a hardware fault and that fault also killed my battery. I'm assuming it was a short. It started as something infrequent, but it eventually escalated to the point the second I turned it on my screen turned completely green and got really hot.

Exxon02 said:
My phone did this as well. Luckily it happened just before I rooted. The att guys said it was a hardware fault and that fault also killed my battery. I'm assuming it was a short. It started as something infrequent, but it eventually escalated to the point the second I turned it on my screen turned completely green and got really hot.
Click to expand...
Click to collapse
Just great, a possible hardware problem while out of warranty. Did yours do it only when charging as well?

a_p3rson said:
Just great, a possible hardware problem while out of warranty. Did yours do it only when charging as well?
Click to expand...
Click to collapse
Didn't have to be charging to do it. Could have been on the street holding it. (I was on GB as well)

Exxon02 said:
Didn't have to be charging to do it. Could have been on the street holding it. (I was on GB as well)
Click to expand...
Click to collapse
Your issue sounds similar, but slightly different. Mine only happens while I am charging it, and it has only done it since a while after I made the upgrade to 4.0.4. Although, they sound similar, and my phone also gets concerningly warm, so I have no idea if it is the same thing or not...

If it's out of warranty, then you have nothing to lose by doing a backup and a clean ROM installation, which is what I would do. I guess if you do it when fully charged and while the phone is cold you should be fairly safe, especially if you use a small ROM. I've found the latest M3 10.1 ROM installs fairly quickly, so that might be worth a shot even just to see if it fixes the problem.
The only risk you're taking is that the phone might die and get bricked in the process if it's a hardware fault, so I guess it's really your call.
EDIT: On that thought, perhaps experiment with seeing if you can charge after leaving it in the fridge for about 15 minutes? It's a trick we used to use to recover data from failing hard drives, if you get them cold enough they can work for long enough to get away with things

davidpartay said:
On that thought, perhaps experiment with seeing if you can charge after leaving it in the fridge for about 15 minutes? It's a trick we used to use to recover data from failing hard drives, if you get them cold enough they can work for long enough to get away with things
Click to expand...
Click to collapse
I like that idea, as it should fix the overheating issue. However, the times that it actually has this malady aren't regular - it seems to happen more at night, but not every night. I could try putting it in the freezer when it does it though, and see if it works. If it is overheating, could it be a hardware issue then? I also noticed that my battery that I have in my phone does appear to have a slight dent near the bottom, and it is only happening when it is charging, so I am wondering if it could be a problem with the battery? When I pull the battery out after it has done this, the battery itself isn't that warm, but the phone is, so I'm thinking it isn't the battery, but does anyone else have any ideas?

[Q] Narcoleptic Note 10.1

My note 10.1 2014 seems to go to sleep randomly. I will be in the middle of doing something... typing, reading, etc... and suddenly it will just go black. It then Wales normally from the lockscreen. Has anyone encountered this before? Clean room with either bindroid or stock kernel does it. I am not sure whether the stock room did it. I think not but I can't say with total certainty.

You should try to find out if it is a software or hardware issue. It could be a power button with a loose contact or a damaged board. I for example had my 7.7 gtab turn of randomly, I opened it up and switched it on and disconnected the power button, it still rebooted randomly. Then i switched it on and disconnected the board with the powerbutton and camera while it was on and it stayed on. I knew it was hardware related because it got wet, replacing the damaged board fixed the issue. What I want to say is: By backtracing to the actual cause of the issue you will be able to narrow it down and we might be able to help.
Sent from my SM-P600 using XDA Premium HD app

{Diemex} said:
You should try to find out if it is a software or hardware issue. It could be a power button with a loose contact or a damaged board. I for example had my 7.7 gtab turn of randomly, I opened it up and switched it on and disconnected the power button, it still rebooted randomly. Then i switched it on and disconnected the board with the powerbutton and camera while it was on and it stayed on. I knew it was hardware related because it got wet, replacing the damaged board fixed the issue. What I want to say is: By backtracing to the actual cause of the issue you will be able to narrow it down and we might be able to help.
Sent from my SM-P600 using XDA Premium HD app
Click to expand...
Click to collapse
Thanks. I have not been able to get the issue to repeat itself consistently at all yet so I have not narrowed it down. I thought there might be a known issue of some kind. Failing that I will have to keep fiddling with it until I get a sense of what if anything actually trips it.
Thanks for the reply.

Hmm, I am exploring the possibility that my case has some magnets in it that I didn't know about, and when folded over it's tripping the automatic sleep. This looks like a promising line of investigation... I know I previously saw an image showing where the magnet sensors are on this device. Can anyone point me to it? I can't feel any magnets in the case but if I know where to look I may get luckier.

[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.

Slowly increasing hardware problem

Hi all,
I have a general hardware problem with my Samsung Galaxy Tab S4. Maybe someone here has an idea or tip for me.
I still used the factory software without any rooting or unlocking the bootloader. So everything original and up to date.
A few month ago the tablet began to restart in the middle of using it. At the beginning it happened seldom, but then more and more often. Also during the restart new restarts happened more and more often, so that it took several retries, until it started again. Now it is not usable anymore, because it is not running longer than a few seconds before the next restart if it happens to boot completely at all.
I was able to make a factory reset but this didn’t solve the problem.
My first theory is, that this could be a problem with the battery, that it is slowly dying and had more and more problems to hold the voltage. But the problem also exists when the power supply is connected. So I am not sure if this rules out the possibility, that this could be cause by the battery? Does somebody know how this is internally wired, if a broken battery could still have a negative effect when the power supply is connected?
Do you have other ideas/advices, what could be the problem or would could be helpful to do?
Thanks in advance for any help.
Best

The USB power input can't sink enough current to boot it or even run it without the battery acting as a reserve during peak usage spikes.
Replace the battery and go from there.

Thanks, then I will try this.

Vertex9999 said:
Thanks, then I will try this.
Click to expand...
Click to collapse
Hi Vertex, have you tried this already? I have pretty much the same problem and the battery was also my first intuition, but I don't know if buying a new one is worth it. Thanks!

Hi,
unfortunately I didn't had time to do it yet. I want to change the battery myself and for that I will need time and somebody to borrow me a hot air gun, because everything is glued together.
I will report, when I have done it but it will be at least a few weeks.

Alright, so I'll probably try it sooner, I'll update after replacing the battery. Also, if you haven't tried it yet, you might want to try just disconnecting the battery from the motherboard and connecting again after like 20s, I've read that it sometimes resolves this problem, but it didn't work for me. Fortunately removing the back lid of tab s4 is pretty easy, I used hairdryer, so with heatgun it should be even easier.

Thanks for the tips. I am currently on vacation but when I am back I will also try with a hairdryer.
Any additional tips for removing the back lid to somebody doing it the first time beyond what you can see in the youtube videos? How do you glue it back together?

Hi, sorry for the late reply.
I have eventually replaced the battery, and nothing changed unfortunately… I did a factory reset, etc. However I also had an issue that you didn't describe in your original post, which is that USB connection is not working, it only charges the battery, when connected to the PC while booted it's just not visible at all (tried with several cables, two computers, on windows and linux), when in download mode it kind of shows up, but it's not recognized and no drivers or any solution that I've found are working, so I don't know if it's still hardware problem something with the USB related parts or something in the system on lower level. Well, I'll be trying.
About the back lid. Beyond YT videos only thing that comes to my mind is patience. About the glue, you have few options and it depends a bit on how removing the cover goes. 1) glue stays in the more or less same condition as before removing the cover - that's how it went for me - in that case you can just reuse it, just by closing the cover and pressing it down for some time, it's probably not as strong as new but for me it worked just fine, especially if you use a book cover for the tablet there won't be a problem.
But if the glue came off, wrinkled a lot, or just doesn't stick anymore, 2) you can either use a special epoxide glue often with signature like T-7000 or T-800 but if you just look for a glue for smarphones you'll easily find it. Or 3) Buy a special sticker for this exact device which has a specific shape, it's pretty much the same thing as is used by manufacturer.