[Q] Display and touch screen major issues following lollipop update. - Galaxy Tab S Q&A, Help & Troubleshooting

Problems with my Samsung Galaxy Tab S 8.4 SM-T705:
1st: October 2014
2 weeks after buying, my tablet's battery drained overnight from 45% to zero. Next morning, I turned my tab on after charging to find out that the Tab starts but without any Samsung GAlaxy Tab S logo or Samsung Logo and the Screen has turned green, rendering it difficult to read in auto brightness mode or low brightness mode.
I restarted the device 2-3times and the device started working normally. This was my 1st device restart. I never used to power off the device before.
In 1st 6months, this greenish display problem n logo problem occured 2-3times, and i ignored it, because, it used to get resolved by itself with restart and I had no service centre in and around 50km to my work place.
2nd: January 2014
My device all of a sudden stopped working.. actually hanged.. I managed to turn it off but failed to restart it.
Later I realised that the device has restarted, but the screen was not responding when the screen blinked for a moment with the opening of book cover.. and the back cover of device was warm..
Googling taught me the way to access recovery screen n I opened recovery mode with "power+vol down+home key" and pressing vol down in recovery screen to restart tab.. again the tab started working fine..
3rd: Lollipop update: May 2015
I did Lollipop update. The device was smooth to operate at first. But gradually, i noticed that unlocking the tab failed to light up the display everytime, just the soft keys lighted up. But one day, the device freezed with no response from touch screen. I was unable to switch off the device also.. I had to drain the battery by playing music using S voice to turn the device off. "power+vol down+home key" too was not working.
On googling, I learned to reset device with "power+vol up+vol down" keys pressed together. finally the device restarted, but the device used to hang occassionally.
Googling let me know that i need to factory reset device upon firmware update for normal functioning, which i didn't do after update. so, I backed up my device, uninstalled many apps to make the device run a bit smooth and did a factory reset.. Resetting didn't improve the situation much, but now, the device display failed to light up on a regular basis on unlocking most of the time..
Now the situation is that, the device turns on, finger print scanner works, all apps n everything working, but display remains black, and touch screen is not responding.. using sidesync, everything on Tab can be accessed via laptop.
Tricks tried:
1) Factory reset
2) power+ vol up+vol down
3) power+ vol up+home key
4) power+ vol down + home key
5) Power off using sidesync and then restart
Results: All failure. Everything works but the display never lights up normally..
Plzz help....:crying::crying:

Bump. I'm starting to have similar problems with my SM-T800 running 5.0.2. I open the cover and the device fails to turn on. I press the power button and the screen stays black but the notification bar turns on. I can shake the crap out of the device and the screen stays black but I can see the notification bar flicker. Driving me batty.

If i had any problems like you guys, I would just return it to the place i bought it, for a refund or replacement or even a repair, post it to the service centre if it`s too far to travel too.
You problems sound like battery and or loose connector inside your tablet, it happens frequently on Samsung tablet for the connectors to come loose, if the tablet is dropped or twisted, no outside damage might be seen.
John.

Related

[Q] Cant even get into download mode - reboot loop

ok so it got a bit wet, then started rebooting randomly once or twice (when i say a bit wet, it was some sticky kids medicine)
it stopped doing that but the power button was a bit sticky so i applied suction to get any residue out of there and the button stopped sticking.
but now its on a reboot loop.
it goes to the gt n7100 screen, then goes off then back to the n7100 screen.
ive tried going into download mode, but it gets to the "warning custom OS" screen, i press volume up and it just restarts again.
ive tried plugging it in to charge and it brings up the battery icon and a circle wait timer then after 10 seconds or so it flashes again to the wait timer (which is not turning)
what else can i do to make it work? is there not a pin button for factory reset anymore?
It got wet. So it's not a software based problem.
Return it to service center and see if they can fix it.
Sent From Samsung's Galaxy Note II Using Internet

Stuck at Black Sceen Crash

I just did a reboot of my tab and it got stuck at what I call "Black Sceen Crash".
Looks like being switched off - but isn't.
It does react on screen touches with a very brief vibration.
And it gets a litte warm.
Does not react on long pressing power button - so no reboot, no download mode, whatsoever.
Guess I have to let it run out of battery - which might take couple of days with screen off. We'll see.
Any idea what to do or what could have caused that behavior? Any similar experience?
Before trying to reboot there was no mobile connection, and I wanted to reboot to get it reconnected. Otherwise no problem.
I am running stock Samsung ROM, rooted, Skyhigh Kernel, OC/UV.
pibach said:
I just did a reboot of my tab and it got stuck at what I call "Black Sceen Crash".
Looks like being switched off - but isn't.
It does react on screen touches with a very brief vibration.
And it gets a litte warm.
Does not react on long pressing power button - so no reboot, no download mode, whatsoever.
Guess I have to let it run out of battery - which might take couple of days with screen off. We'll see.
Any idea what to do or what could have caused that behavior? Any similar experience?
Before trying to reboot there was no mobile connection, and I wanted to reboot to get it reconnected. Otherwise no problem.
I am running stock Samsung ROM, rooted, Skyhigh Kernel, OC/UV.
Click to expand...
Click to collapse
Yeah, I also discovered long pressing power button alone does not force-reset the device. I managed to reset it though by press-hold Power + Home + Either Vol Up/Down. Give that a try.
I can't remember whether it was the Vol Up or Down, try one then the other if it didn't work first time. Good luck.
After a while (30 min probably) it did not any more react on screen touches and was cold. Off maybe? Still no reaction on long pressed Power Button. Tried Volume Down+Home+Power Button - and fortunately it revived the tablet. Strange. Thanks for the hint!
I face the Black screen of death and the device (T805) was not responding to any reboot, recovery or download mode actions, sent it back to Samsung support and they claim an internal piece of HW need to be replaced, I refused that and asked for refund or new device... After a week I got a replacement device...

[Q] black screen / Screen unresponsive - Sumsung Galaxy Tab S 10.5 (SM-T805)

My tablet Galaxy Tab S 10.5 (SM-T805) screen went black. I can’t see the screen.
Touch also does not seem to work. However it’s on. it is receiving calls and other messages. It is connected to WiFi.
Power button, volume button are working but I can’t power off the device cause I can’t see the screen options.
When I plug in to the charging cable it vibrates but does not show anything on screen.
It didn't drop or hit by anything. i have been using it for 3 months now. it just happened by itself or may be by some update that I don’t know.
Please help how to bring it back to life
GUI crashed. Press Power+Vol up+Home (for approx 20 sec).
pibach said:
GUI crashed. Press Power+Vol up+Home (for approx 20 sec).
Click to expand...
Click to collapse
I tried several times.. nothing happens... any other suggestion please
Power+voldown+home.
If this does not boot, you could try with usb dongle.
Or full run down to empty battery.
Next chance would require to open it.
sarhn007 said:
My tablet Galaxy Tab S 10.5 (SM-T805) screen went black. I can’t see the screen.
Touch also does not seem to work. However it’s on. it is receiving calls and other messages. It is connected to WiFi.
Power button, volume button are working but I can’t power off the device cause I can’t see the screen options.
When I plug in to the charging cable it vibrates but does not show anything on screen.
It didn't drop or hit by anything. i have been using it for 3 months now. it just happened by itself or may be by some update that I don’t know.
Please help how to bring it back to life
Click to expand...
Click to collapse
It's not bricked so calm down. It just had a cyber stroke. It will be fine just let the power run out and recharge the battery so u can turn it on again. Same thing happened within days for getting mine.
yes... I am waiting for the battery to be completely dead. so far its on...taking calls and sms..I don't howmuch % of batter is left cause I can't see it.
I had the exact same problem once....and i had a hunch that the screen was fine, it turned out it was thankfully....but....im aware that on 100 percent battery in standby it can last a good week or so....i was too impatient...so i ran my fingers around the edge of the backing and slowly was able to pull out the back of tge case and unclip the battery...worked straight away when turned on.
But also what i discovered does reset the tablet forcefully is holding power, vol down and the center button at the same time....try it a few times for a minute each time...if successful you might get a message about being in download mode but then just do the same thing again but imidiatly release your fingers once you see the screen go off from download mode or it will just go bavk into it...good luck m8
Have you tried holding down the power button for awhile, like 30 seconds? This should shut your device off....Then take it from there.
Itchiee said:
Have you tried holding down the power button for awhile, like 30 seconds? This should shut your device off....Then take it from there.
Click to expand...
Click to collapse
Doesnt work on t805...dunno why.
pdolton2000 said:
Doesnt work on t805...dunno why.
Click to expand...
Click to collapse
Correct .. i tired many times... it does not work... may be the device is on...
How to run down the battery its still on .. its third day today...
sarhn007 said:
Correct .. i tired many times... it does not work... may be the device is on...
How to run down the battery its still on .. its third day today...
Click to expand...
Click to collapse
Seriously on my tab right now i just held vol down, power and center button whilst on and after 25 seconds screen went black then gave the "are you sure you want to enter download mode." Then i tapped vol up......t805 as well.
Battery completely empty.. tab S turned off, i plugged in the charging cable (1 ) battery meter does not appear (2) Power+vol does not work for me.. if it does.. i can't see because of the dead screen...
i have 2 options now..
(1) send it back in warranty.. this will take a lot of time and they will only fix not replace.. i guess
(2) open it and fix the display.
Thinking,,,,,,,,
sarhn007 said:
Battery completely empty.. tab S turned off, i plugged in the charging cable (1 ) battery meter does not appear (2) Power+vol does not work for me.. if it does.. i can't see because of the dead screen...
i have 2 options now..
(1) send it back in warranty.. this will take a lot of time and they will only fix not replace.. i guess
(2) open it and fix the display.
Thinking,,,,,,,,
Click to expand...
Click to collapse
Well 160 dollars for lcd , digitizer and frame ...
http://m.aliexpress.com/item/2016775924.html?tracelog=storedetail2mobilesitedetail
But if it turned out it was something else causing it nit to display like a board fault im not sure they will help ya only catch m8
Hello,
Did you finally got some result?
I have exactly the same problem with a Samsung Galaxy Tab S 10.5. The screen suddenly went black although the light leds (home, back) were on.
I tried different combinations of buttons, usb charging and nothing. The only difference is that now the light leds are off.
---------- Post added at 08:46 PM ---------- Previous post was at 08:32 PM ----------
I have achieved to boot up the device because I have heard the start up sound and some notifications. However, the display doesn't work at all: the screen is black and there is no response when touching it. In addition, the light leds of the buttons are off now even when I push the home button.
Volume keys are working (I hear the sound then touching them).
Hard reset is VOLUME DOWN(left side on a 10.5) + POWER. Hold until it restarts.
ashyx said:
Hard reset is VOLUME DOWN(left side on a 10.5) + POWER. Hold until it restarts.
Click to expand...
Click to collapse
That doesn't work, as sarhn007 said the problem is that screen is dead:
sarhn007 said:
Battery completely empty.. tab S turned off, i plugged in the charging cable (1 ) battery meter does not appear (2) Power+vol does not work for me.. if it does.. i can't see because of the dead screen...
i have 2 options now..
(1) send it back in warranty.. this will take a lot of time and they will only fix not replace.. i guess
(2) open it and fix the display.
Thinking,,,,,,,,
Click to expand...
Click to collapse
But I can't figure how could this happen in a new (2 month) high-end product... I think that I will have to use the product warranty with the cost in time it involves.
This has happened to me twice during the last year. The last time was just ten minutes ago. I tried everything mentioned in this thread. VolUp+Home+Pwr for a looong time. Just PWR for a long time. I saw on my Wifi Router that the tablet was connected, but no screen. What helped me was to do a combination of everything mentioned here. What eventually got the screen on was 1. I turned of my router and 2. Home+VolDOWN+PWR for (what I believe was) 10-15 seconds. Then I got the choice to do a normal restart or a device reset. If you come this far, be sure to press VOL DN when asked. Otherwise your data will be lost. Obviously, I can't say if the router pwr off was necessary or not.
What's really weird is that my LG G3 went into a boot loop at about the same time (less than five minutes apart). They are not connected other than using the same router. I've had my LG G3 for exactly one year without ever experiencing a boot loop. The LG G3 is rooted, but my SM-T805 is not.
zeknun said:
That doesn't work, as sarhn007 said the problem is that screen is dead:
But I can't figure how could this happen in a new (2 month) high-end product... I think that I will have to use the product warranty with the cost in time it involves.
Click to expand...
Click to collapse
It's easy fix, most of the time due to loose LCD cable. If you can hear anything on the background but blank screen, 99% is loose cable.
Remove the back cover, disconnect and reconnect LCD cable, make sure it's fully inserted, then secure the connector with tapes. Test by plugin to charger, press the HOME button.
If you do correctly, the battery icon should show up on the screen. Then put back the cover, you're done.
pdolton2000 said:
I had the exact same problem once....and i had a hunch that the screen was fine, it turned out it was thankfully....but....im aware that on 100 percent battery in standby it can last a good week or so....i was too impatient...so i ran my fingers around the edge of the backing and slowly was able to pull out the back of tge case and unclip the battery...worked straight away when turned on.
But also what i discovered does reset the tablet forcefully is holding power, vol down and the center button at the same time....try it a few times for a minute each time...if successful you might get a message about being in download mode but then just do the same thing again but imidiatly release your fingers once you see the screen go off from download mode or it will just go bavk into it...good luck m8
Click to expand...
Click to collapse
really thanks dude...nice work..
my phone samsung on nxt today stopped working in same manner...your idea worked...really thanx..i tried all...as i am also a tech guy.....but nothing worked..ur idea worked for me...thankx a lot...

Xperia Z2, flashed long time ago, screen all black out but still responsive

It was 2 days ago since my phone screen suddenly black out, still responsive thought, checked by entering the passcode, answers call, and turn on the flashlight. If i pressed the power button which means screen on, the screen showing a very low white light over all the place. And when i pressed the power button again which means screen should go off, it's off like a normal. I tried search for solutions mostly suggests to sony companion software repair that brings to factory reset. But sadly i can't use it because my it says i'm using modified software. I'm planning to flash my phone again. Currently, usb debugging is off and can't turn it on since the screen black.
Any suggestions for what should i do? Maybe cast the screen to pc using some apps?

S8+ constantly restarting

Last Saturday night my Verizon S8+ suddenly began to freeze. It would do it with many different applications so I don't feel it is associated with one in particular. It then would restart and would hang at the Samsung splash screen. I was able to boot into maintenance mode and then select safe mode. It would boot to safe mode and would function as expected but then without warning restart again. I took the phone in to a local repair shop who said it could be the battery. Replaced the battery and it seemed to work but then started the boot loop again. Since the battery didn't fix the issue I did get a refund. At any rate after letting the phone sit on the wireless charger overnight it did appear to have fully charged and I was able to boot it up normally. There are some pictures that I needed to get off the phone so I plugged it in to my PC and started copying files over. After about 3 minutes it restarted on it's own and the whole boot loop process again. Now be aware that I know just enough about what I'm doing to be dangerous so here is what transpired next. I started pushing a combination of the power button, the bixby button and the volume up and down buttons and managed to get into the downloading a custom OS menu (see attachment 1) I didn't feel comfortable with this so the screen clearly said if you want to download a custom OS press the volume up key otherwise press the volume down key to cancel. Well I must have fat thumbed the volume down key and by accident pressed the volume up key. Upon rebooting it tried to perform a software update but would give an error message file not found. After several attempts to bypass this screen with a combination of pushing the buttons I was able to boot the phone into recovery mode (see attachment 2) and that is where it is right now. Good news is it hasn't tried to reboot so obviously it in a boot area ahead of whatever was causing the issue to begin with. I also note that the blue charge light indicator seems to be glowing from dim to bright as if I am charging the phone but I don't have the cable connected. So that's my story and I'm sticking to it. I am hopeful that one of you Android technical gurus could advise me of a way to recover the functionality of my phone through this menu? I have attached a couple of screen shots relevant to my issue. Please help and thank you in advance for any assistance.
Jim

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