Black Screen, won't do anything. - Galaxy Tab S2 Q&A, Help & Troubleshooting

Hello,
I have a rooted and TWRP installed but otherwise stock 5.something T710 that I had worked on months ago. It's been great and my daughter had been using it to watch videos a couple days ago. I took the tablet from her at the end of our road trip and noticed it had about 63% battery left. I left it in the truck while we went to the movies(about 40 degrees f outsides) and then drove home without ever touching it until we got home. I went to use it when we got home and it would not turn on. I plugged it in to let it charge thinking it died for some reason, using the stock charger, though battery icon never appeared. The next morning I went to check it and it still would not turn on.
When I press the power button or plug in or unplug the charger the Recent and Back soft key lights will turn on for a second, then turn back off again.
I've tried:
Holding the power button down alone for over 3 minutes.
Held the power and volume up button for over a minute
Power and volume down for over a minute.
Home, volume down and power for over a minute
Home, volume up and power for over a minute.
I can connect it to my computer and it recognizes that my Tab S2 is connected but no files show as the default for the device was just charging mode and not the file modes.
Odin3 v3.10.7 recognizes it as connected. But fails to send the TWRP file again.
Any help?

Since the soft keys light up and the computer recognizes the device, it sounds like maybe the tab is still working but with no display? By any chance did you have adb working? I f so you could try rebooting, or booting into recovery to see if you see anything on the screen. It's possible that when you held the button combos, that it did boot into download and recovery but you couldn't see anything? In which case it could be a hardware problem. Hopefully it will fix itself! Sorry I can't be of more help..

Well adb shows the device as unauthorized. Reboot command says the same thing.
The home key is unresponsive to my finger print unlocks and no sound plays when I try to adjust the volume, like the ding sound it makes to hear if this is the volume level I want. There are never any of the capacitive touch vibrations or whatever its called to feel when you press a button on the screen.
I was wondering if it had something to do with hardware it's just strange that it would stop working from just being in my truck. From my knowledge it was never dropped or bumped heavily or anything, at least recently.
I guess it is possible something just burned up inside, that would be inconvenient, I've got to look up if its still in warranty. I love the size and performance of this thing.
Thanks for replying, hopefully more to come.

Still can't get it to work, same issues as above. I let the battery fully die which took about 2+weeks from the initial post. Which is to say that eventually the back and recent buttons stopped lighting up. I recharged it and after holding the power button for a few seconds the same condition repeated itself. If I touch the power button or home button the back and recent button back lights turn on for a moment and turn off again. There is no other indication of life. I would assume if it was just a dead screen then I should feel it try to turn on.
If I had to replace parts which ones should I look at first? Probably just the main board?

Buy a new one. Send yours in as defect. Done.

erase111

I see that is an old thread, but I having the same issue to a certain degree. The screen goes dark, but I can see the back light. If I play around enough times, (pressing the back and process button, before pressing the sensor button... Sometime, pressing the volume buttons and back button before pressing the sensor button), everything goes back to normal. Of course, it some random time, even when I am reading a web page or some other activity, it will go back to black.
So has anyone figured out what this issue actually might be? I thought maybe it was an issue with the ROM I was using, so I just moved over to LineageOS 16, but the problem still continues!

Related

[Solved] Hardware issue with power button

Build date 1007 - in service August 2010.
I've been running Pinnacle 1.2 (been on it since v1.0).
Just moments ago I've found the power button to be unresponsive. This happened after I rebooted into recovery, sticking me there for a while.
I was stuck in a recovery loop- pull batt, reinstall batt, automatic boot back into recovery.
Somewhere in the process of trying different combinations of battery pulls with cable installs and volume up/down holds (trying for download mode) I ended up finally launching the ROM, but w/o a power button all I can do is pull the battery, and the moment I do, the phone automatically wakes w/o even touching the power button (which is totally new to me).
Any input would certainly be appreciated.
My first order of business is to flash to stock (JF6, bootloaders and all if all else failed) but being that it automatically boots when the battery is installed I don't think even a jig would help...or is the beer steering me wrong?
I am confused. You can go back to stock or no?
I cannot get into download mode. The only way to power the phone off is via battery pull.
I cant flash anything from recovery because it says the power button is disabled (it is).
As I put the battery back in the phone boots immediately...I mean the at&t screen lights up my palm before I put the cover on or even flip the phone over.
Use an app from market to enter download mode? system toolbox free is one
Used Odin to go back to stock KF1 and still no power button. Now System Toolbox won't work w/o root/busybox. lol
Once my phone falls asleep I can't wake it back up.
It may seem obvious that the power button is physically broken but I don't know why the phone boots up as soon as the battery is installed...that was never the case before this issue came up.
watsa? Anyone?
Can anyone else shed some light on what would make the phone boot when the battery is inserted (happened at the same time the power button became unresponsive), essentially denying me the opportunity to get to download mode.
beyond this point I am consfused myself. I initially blamed Pinnacle and thought going back to stock might fix it which obviosly didn't happen.. It seems like your power button is always "pushed" so as soon as you pop your battery in phone reboots..
watsa said:
beyond this point I am consfused myself. I initially blamed Pinnacle and thought going back to stock might fix it which obviosly didn't happen.. It seems like your power button is always "pushed" so as soon as you pop your battery in phone reboots..
Click to expand...
Click to collapse
On a second thought if it was the case then power button should have messed up functioning of your phone even after powering on. So I am consfused more. Need a hardware expert here
I'm preparing myself to deal with my beloved phone finally letting me down after all the success we've had...it's just really bad timing as I'm currently unemployed, broke and only 13ish months into a 48 month contract.
Ok, so after a physical tear down it seems to be in the external plastic of the button itself?
After removing the outer case and reinserting the battery I noticed it did not automatically boot up. I pressed the actual power switch/button that is connected to the board and the phone then powered up. I let it finish booting and held the power button down and the power options menu popped up. I clicked Power Off and it shut down fine.
This means it certainly isn't Pinnacle ROM (never thought it was, personally), or software related at all. Now to figure out what is going on between the plastic external power button and the power switch on the board.
Edit: Nothing was there? I blew out the dust reassembled the phone and now it works fine. Weird.

Power Button Seems "stuck" on?

No problems with my Serendipity 7 ROM aside from a few occasional crashes/freezes, on my i897... but then last night, out of no where, my screen wasn't coming on. I thought it had froze again, so I did the Vol up/down+power reboot.
Came back up, then when I tried to turn the screen on again, it wasn't working. I put the cable in for power/USB, and the screen came up no problem. I thought maybe the power button wasn't working, but it reboots with all three buttons down... not sure why. Then I tested just holding the two Vol buttons and no power, but it still rebooted...
Looks like the power button is acting stuck down even though I can clearly hear the button working. Ideas?
Mobile tech videos has a fairly affordable power button replacement service.
sent mine you him, got it back in perfectly working order within a week.

Black screen but touch screen works?

Hello, sorry if this has been answered, i did a search for black screen and didn't find the same thing.
Basically my nook hd+ is about 2 months out of warranty. When i try to power it on, i can see the screen light up but nothing is displayed (its all black and dims slightly). When i was messing with it trying to reset it, it started to read aloud the applications i touched on or button i pressed. So the touch screen is still working even though it's not displaying anything. I tried to hard reset it, by holding down the buttons and pressing the n twice, but that didn't seem to work either. Anyone got ideas?
Don't know what that is -> "holding down the buttons and pressing the n twice".
But if I had this problem I would...
Hold down the power button for >10 seconds as this completely turns off the device, then attempt to turn it back on.
And if that failed to work... let it sit and run out of battery, then plug it in to the wall usb adapter, let it charge for an hour, then try powering it on with the power button.
And if that failed to work, since its outta warranty, buy something that works.
But that's only what I would do

No responding M7

Hi all,
This morning i check if my bootloader was unlocked, because i wan't to give it a try to root it.
I found out it was unlocked (holding down volume and press the power button)
After that, i rebooted my phone and everything worked normal.
Until a couple of hours later, my screen didn't wake up when i pushed the power button.
The homebutton and the backbutton where flickering (going on and off)
So, i waited for a couple of minutes, but nothing changed.
After (i think) 10 minutes, i hold the power button for a couple of seconds and the flickering buttons stopped.
Since then my phone doesn't repsond anymore. I tried the powerbutton for a while, and with the combination of holding the vol. up and down.
So far nothing helped.
Does anyone know what's wrong, and what i can do to wake my phone from its coma?
Thanks in advance!
Enjoy your weekend. Ben
Did you press the power button for a few second before the soft keys started going on and off? Does your phone show a green battery animation when you connect it to a charger?
If the soft keys started flashing on their own, and if your phone doesn't show any signs of life even when you attempt to charge it, I'm afraid this is a hardware problem which no one can fix online.
let's wait and see what more experienced members have to say.

Question Phone froze, powered off, and now unresponsive

Today I was in the car and using TeslAA Android Auto app on my Pixel 5a. At one point, the phone froze for a period and was unresponsive to any buttons. It then powered off, which I thought was restarting, but it never came back on. No matter what buttons I held down for how long, it was completely unresponsive. Nothing on the screen at all. I tried plugging it into my computer and when I held down the power button I could hear the USB sound on the computer. A long press (as if a hard reboot) would make it sound like I had unplugged the phone, and then pressing it again would sound like I plugged it back in. But still nothing on the screen. I have had zero issues with the phone up until now. What can I try?
I also tried power and volume down, but still nothing on the screen. It's like my screen completely died suddenly.
BlueWRXPride said:
Today I was in the car and using TeslAA Android Auto app on my Pixel 5a. At one point, the phone froze for a period and was unresponsive to any buttons. It then powered off, which I thought was restarting, but it never came back on. No matter what buttons I held down for how long, it was completely unresponsive. Nothing on the screen at all. I tried plugging it into my computer and when I held down the power button I could hear the USB sound on the computer. A long press (as if a hard reboot) would make it sound like I had unplugged the phone, and then pressing it again would sound like I plugged it back in. But still nothing on the screen. I have had zero issues with the phone up until now. What can I try?
I also tried power and volume down, but still nothing on the screen. It's like my screen completely died suddenly.
Click to expand...
Click to collapse
Never mind
BlueWRXPride said:
also tried power and volume down, but still nothing on the screen. It's like my screen completely died suddenly.
Click to expand...
Click to collapse
did you try power + vol down + vol up? all 3 at once for about 30 seconds then power on? that is a hard reset
Yeah I tried it all. I ended up realizing that for a problem like this, there's an additional year of warranty coverage, so I sent it into google for a free repair. So that was a nice surprise!

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