Need help! SM-T900 loses power randomly, on charger or battery. - Galaxy Tab Pro 12.2, 10.1, 8.4 Q&A, Help & Trouble

My SM-T900 loses power and goes to a dead state, even though the battery shows 100% charged.
When this happens, I can:
Plug in the USB charger (both the charger and cable are Samsung OEM)
The screen shows a gray battery icon, with "0" in the middle
Within a few seconds, the battery icon changes to "100%" and fills with a green animation to the top
At this point (charger still plugged in), I can boot the tablet normally using the power button.
Once the tablet is booted, if I unplug the USB charging cable, the tablet instantly goes dead
If I leave the charging cable connected, the tablet still goes dead at some point (usually from 30 seconds - 5 minutes)
Any ideas from a Samsung expert? This sounds like it might be a hardware failure, but I know that software and hardware are very closely coupled on these devices. Suggestions greatly appreciated.
Earl

e_s_jones said:
My SM-T900 loses power and goes to a dead state, even though the battery shows 100% charged.
When this happens, I can:
Plug in the USB charger (both the charger and cable are Samsung OEM)
The screen shows a gray battery icon, with "0" in the middle
Within a few seconds, the battery icon changes to "100%" and fills with a green animation to the top
At this point (charger still plugged in), I can boot the tablet normally using the power button.
Once the tablet is booted, if I unplug the USB charging cable, the tablet instantly goes dead
If I leave the charging cable connected, the tablet still goes dead at some point (usually from 30 seconds - 5 minutes)
Any ideas from a Samsung expert? This sounds like it might be a hardware failure, but I know that software and hardware are very closely coupled on these devices. Suggestions greatly appreciated.
Earl
Click to expand...
Click to collapse
I found another thread here on XDA concerning battery-related issues with Samsung tablets. On a hunch, and the advice on that thread, I removed and reinstalled my battery.
The problem has been solved! It must have been a loose connector.
Earl

Related

Plugging in usb cable will automatically start phone

I've been going nuts with this problem, that if the phone is being charged with usb cable plugged in, when I press "Power off" the phone will shut down and automatically restarts itself.
If I unplug the cable the phone can power off fine, but when it's in power off state, as soon as I plug in the cable, it starts itself automatically just as if I pressed and held the power button which I didn't.
What's going on?????????? Please help.
Clarify: it's not that the screen turns on, it's the phone actually turns on / boots / starts.
EDIT:
Did a little research, my problem is the same as here:
http://forum.xda-developers.com/showthread.php?t=1209918
http://forum.xda-developers.com/showthread.php?t=689248
I noticed with mine, the only time it started up automatically was when I didn't have the USB cable plugged in fully to the wall charger.
I think that the phone can somehow detect either resistance or capacitance changes in the USB connection and turns on under certain circumstances, while it is supposed to stay off if the resistance / capacitance values are "normal".
it's normal for the screen to turn ON when you plug in the USB cable
it's NOT normal for the Phone to turn ON from OFF when you plug in the USB cable
the normal behaviour for when the Phone is completely OFF when you plug in the USB cable it should just show you the green battery meter charging
AllGamer said:
it's normal for the screen to turn ON when you plug in the USB cable
it's NOT normal for the Phone to turn ON from OFF when you plug in the USB cable
the normal behaviour for when the Phone is completely OFF when you plug in the USB cable it should just show you the green battery meter charging
Click to expand...
Click to collapse
The phone turns on.
maybe it's a defective unit?
have you tried going back to stock?
AllGamer said:
maybe it's a defective unit?
have you tried going back to stock?
Click to expand...
Click to collapse
I doubt it's a defective unit because it used to be fine. Just happened yesterday.
Everything is stock right now.
try a different charger/cable. if it still happens return it.
I had this problem after wiping my battery status and draining it all the way down. After charging over night, I then ran battery calibrator the next day and when i ran it all the way down again and plugged it in the problem was solved. Hasnt happened since (since 2 days ago when this happened anyway).
very interesting
Mine turns on when I plug in a usb cable while the phone is turned off following a battery stuck at 100% condition. In other words, if my phone is stuck at 100% (usually every time after charging), and I turn the phone off, and then plug in the usb cable, the phone will turn on by itself. But if my phone is not stuck at 100%, and I turn the phone off and then plug in the cable, I get the green battery.

[Q] Strange power on issue

I've inherited a HOX which I'm trying to set up for my wife to use. It has a very unusual issue, when plugged in either to a charger or a PC, it shows no indication of charging - i.e. no red LED. On a PC, it intermittently gets picked up as an unknown device - or more correctly 3 unknown devices, maybe mass storage, composite & MTP? Not sure cos it doesn't pick up any device info. As I say it is intermittent which suggests the micro-USB socket might be at fault.
But there is evidence that it is accepting a charge because every 10 minutes or so the phone vibrates and displays the initial start-up screen i.e. white background with HTC logo & it doesn't get past that. It doesn't show the 'Quietly brilliant' screen first like on a regular start-up. The screen stays lit for 3 minutes or so, then it flickers and turns off. Then it turns on again about 10 minutes later and goes through the same cycle. It does this continually when plugged in. I've also tried charging using the 2 end dock contacts and it goes through the same cycle. Also, the battery & board are both warm but not hot.
I've ordered a replacement USB socket which is easy to fit as its not soldered - this might help with PC access.
I've also tried using a variety of button combinations, but the buttons seem to be completely inactive and don't do anything either when it's in the 'on' or 'off' mode.
Any ideas? I've searched and haven't come across anyone else experiencing this issue.
Just realised that the charge port is soldered in place, not just pressure contacts. It's completely detached.
Has anyone replaced a charge port? Got soldering gear but that looks tricky...

8.4 not charging while on

This isn't the usual "won't charge to full" issue i have been reading about. The tablet is not seeing power connected. Settings>Battery does not show charging. Tasker does not see power connected. HD Widgets does not show charging. Battery bar does not show charging. Ampere (app) shows discharging.
So I did a shutdown and connected power. The tablet does a thing where it shows the battery on the screen and the red & yellow kernel stuff. Then it shows the other "flat" battery icon. Then the display blanks and does all that again and again.
I did try several reboots, hot reboots, soft reboots, long pressing power reboots.
I see an increase in battery level after it is plugged in while completely shut down. Ten minutes got me 4%.
And yes, two known good power cords on two known good outlets. Verified by connecting my phone.
duckredbeard said:
This isn't the usual "won't charge to full" issue i have been reading about. The tablet is not seeing power connected. Settings>Battery does not show charging. Tasker does not see power connected. HD Widgets does not show charging. Battery bar does not show charging. Ampere (app) shows discharging.
So I did a shutdown and connected power. The tablet does a thing where it shows the battery on the screen and the red & yellow kernel stuff. Then it shows the other "flat" battery icon. Then the display blanks and does all that again and again.
I did try several reboots, hot reboots, soft reboots, long pressing power reboots.
I see an increase in battery level after it is plugged in while completely shut down. Ten minutes got me 4%.
And yes, two known good power cords on two known good outlets. Verified by connecting my phone.
Click to expand...
Click to collapse
Sounds like a strange issue, if the battery is dead but you are using the tablet then perhaps it is getting power since usually it will shutdown when battery level is past a certain percent (unless it is plugged in), so if that is the case there might be a few things to try
first try to hook it up to your pc see if it detects the tablet (just to make sure the usb port on the tablet is working properly) if so then that's a good sign.
if the usb port is working correctly it could be the wire connector on the actual battery inside the tablet it might have just come loose since it's just a simple press down clip that holds it inplace and a drop or other hard hit could cause it to dislodge, see the thread on how to open the tablet if you want to check, or if it is still under warranty it might be better to send it to samsung if you are uncomfortable opening the tablet yourself
http://forum.xda-developers.com/gal...eseating-battery-wonder-battery-life-t2944610
Now if the usb port is not working or it's not even keeping the tablet powered on it could be anything from a failed charging mechanism, broken usb port, ...etc and probably only Samsung service center can fix it.
The battery is about 75% now… powered off until I can get more info. I am using genuine Sammy chargers and they still connect snugly. Note that it does charge when powered off.
So after an extended power off period I rebooted and charging is normal again. Still considering checking the battery connection. It has always charged slower than I would expect.

Tab Pro 8.4 stuck in logo screen/battery loading screen

Hey folks,
I did not use my tab for several months (it was working before), now when I plug it into the charger (either usb or wall socket) it either hangs in a flashing screen sensation of the Samsung galaxy tab pro screen or at the battery screen while this one is just with a loading icon, it does not really charge.
As soon as I unplug the cable it shuts off. I cannot boot into recovery mode, it just hangs there. I can boot into download mode however and I re-installed root and twrp recovery via Odin, however this did not help.
Any other suggestions please?
Appreciate the help.
Plug it into the wall. Leave it plugged into the charger. Hold the power button down for up to 2 minutes. See how it goes!
No change, just keeps rebooting.
dante`afk said:
Hey folks,
I did not use my tab for several months (it was working before), now when I plug it into the charger (either usb or wall socket) it either hangs in a flashing screen sensation of the Samsung galaxy tab pro screen or at the battery screen while this one is just with a loading icon, it does not really charge.
As soon as I unplug the cable it shuts off. I cannot boot into recovery mode, it just hangs there. I can boot into download mode however and I re-installed root and twrp recovery via Odin, however this did not help.
Any other suggestions please?
Appreciate the help.
Click to expand...
Click to collapse
When you didn't use the tablet for those several months did you keep it running or did you use the power off option, if you left it running then it probably shut it-self down when battery got low, then the extra time left probably completely depleted the battery causing irreversible damage to the battery (lithium-ion batterys aren't made to deplete to 0 volts it will ruin them), the proper way to store a battery device is to fully charge it then power off the device and it should store for up to a year fine.
sometimes you can give the battery a boost, or maybe the samsung charger blew out, first try another 2+ amp charger and a new cable.
or you can even try your pc usb port connect it for about 10-15 minutes (sometimes the low 500mA current is good to revive completely dead batteries though keep the screen off), see if you can get any voltage back into the battery and if it starts holding a charge, then switch to a proper charger.
if the battery is under 3v the tablet is designed to shut off to protect the battery so if the voltage is less then that it might take some tinkering to get the voltage above that threshold to keep the tablet running.
otyg said:
When you didn't use the tablet for those several months did you keep it running or did you use the power off option, if you left it running then it probably shut it-self down when battery got low, then the extra time left probably completely depleted the battery causing irreversible damage to the battery (lithium-ion batterys aren't made to deplete to 0 volts it will ruin them), the proper way to store a battery device is to fully charge it then power off the device and it should store for up to a year fine.
sometimes you can give the battery a boost, or maybe the samsung charger blew out, first try another 2+ amp charger and a new cable.
or you can even try your pc usb port connect it for about 10-15 minutes (sometimes the low 500mA current is good to revive completely dead batteries though keep the screen off), see if you can get any voltage back into the battery and if it starts holding a charge, then switch to a proper charger.
if the battery is under 3v the tablet is designed to shut off to protect the battery so if the voltage is less then that it might take some tinkering to get the voltage above that threshold to keep the tablet running.
Click to expand...
Click to collapse
I'd guess it was left off without powering it down.
When I plug it into the PC via USB or into a power socket I just see the 'Samsung Galaxy Tab Pro SM-T320' log and it is flashing continuously.
RMA? I can get into download mode, but how does that help me? Knox warranty void shows 0x1 - it's voided, correct?
Anyone?
hello
your battery is hs
look here to change it: "https://www.newpower99.com/"
when you leave back your tablet use these: "repair battery life" & "L speed"
regard
thanks
can anyone vouch for this shop? I'll order a battery there and try to repair it myself.
that worked, easy installation and extended battery life

Pixel 3 XL does not turn on after dropping

I've dropped the phone and I could see that as soon as it hit the ground the screen went black.
This is a Pixel 3 XL that I own for some time and have already replaced the screen and the battery by myself.
When I connect to original USB charger, the battery charging icon starts flashing. If I hold Power ON, Google logo appears briefly and screen goes black again. After 3-4 hours on the charger, the phone is not even a little hot, probably denoting it was indeed not charging (?).
If I put the phone a Samsung wireless charger, the charger recognizes the phone, but there are no screen indicators.
I've just made a video:
Maybe it's a battery wire issue? Or maybe the battery is dead? What do you think?
quera said:
I've dropped the phone and I could see that as soon as it hit the ground the screen went black.
This is a Pixel 3 XL that I own for some time and have already replaced the screen and the battery by myself.
When I connect to original USB charger, the battery charging icon starts flashing. If I hold Power ON, Google logo appears briefly and screen goes black again. After 3-4 hours on the charger, the phone is not even a little hot, probably denoting it was indeed not charging (?).
If I put the phone a Samsung wireless charger, the charger recognizes the phone, but there are no screen indicators.
I've just made a video:
Maybe it's a battery wire issue? Or maybe the battery is dead? What do you think?
Click to expand...
Click to collapse
you can dissasemble the phone (heat plate to soften adhesive and insert picker) and (disconnect and) reconnect or replace battery
Well, it turns out that the phone is bootlooped. The charging battery icon blinking was the phone bootlooping. I found out when I unlocked the bootloader via fastboot. So sad.
I'm trying to run this command:
fastboot boot twrp.img
But the phone restarts before entering recovery.
I have the same problem. What should I do to recover? Thanks.

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