Screen will not turn on once it's off - Android Q&A, Help & Troubleshooting

Hey guys, help me please troubleshoot this issue without resetting my phone..
My Samsung phone (after small/short water damage) has an issue..
If I turn it on, the screen lights up and I can see Samsung logo and welcome screen.
I can login to my phone using pattern unlock and use it just fine, there is no issues, but once screen turns off (due to screen time out, or if I press power button) it will never turn on again, even fingerprint doesn't turn it on..
AOD will not come up as well
Any thoughts?

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[Q] Unusual S3 lock screen problem

Hi all,
I have a Samsung Galaxy S3 GT-I9305T rooted and running Android 4.3 with Touchwizz.
The problem I am having is that the screen will not turn off and pressing the power button will not lock the phone. Holding the power button will bring up the device options menu (power off, restart etc) indicating that the button itself is still functioning.
Restarting the device will boot to the lock screen, however the screen still wont turn off and after unlocking the phone once, you can no longer lock the phone.
In the phones settings, under battery it shows that it doesn't even register the screen as being on or the phone being awake (see image) however the phone is still completely functional aside from the issues stated above.
This problem occurred after accidentally dialling emergency services from the lock screen while watching a video on my computer and absent mindedly spinning my phone in my fingers. As soon as I saw it was dialling I cancelled the call and took the battery out. When I started the phone I noticed the screen wouldn't turn off and the phone wouldn't lock.
Hoping I wont have to do a factory reset, if anyone has any ideas or suggestions, they'd be greatly appreciated.
Thanks
Have same problem with my Alcatel Onetouch Fierce 2. Fairly certain it's from this Kingroot in my case. However I don't know enough to prove this. I started using apps to lock the screen for me but they started not working as well.

Strange screen behavior

Hello,
Yesterday I have unlocked my phone with my finger print (like I always do) and it took about 5-6 seconds for the screen to show something. The backlight turned on rather quickly but the screen remained black. After the screen turned on, it had a bad case of screen retention, the colors were also darker and I could not use the buttons from the bottom of the screen. A reboot solved all this problems.
Also, sometimes when I turn on the screen, it quickly goes dark and the slowly comes back to the initial state. During this time I cannot use the touch screen. It is like it does the wake up of the screen all over again.
I think this is a software issue (I have V20C on H850) and it might be related to the always on display. Also, all of these problems happened when I woke my phone using only the finger print (not pressing the button or knocking on the screen).
Did anything like this happen to you?

Screen flicker when waking phone

I've notice my screen flicker when waking my phone. It only does it when ambient display is set to always on. I've been able to reproduce it by unlocking the phone then pressing the power button to turn the screen off. As soon as the ambient display comes on press the power button again and the screen flickers just before it comes on.
Has anyone else got this problem?
Check the video in the link showing the issue.
https://youtu.be/WWuTusSMIGg
Sent from my Pixel 3 using Tapatalk
I have it but not as bad. For me its like very thin white almost like static lines once AOD is enabled and I turn on the phone either by the power button or the fingerprint. Once I turn off the AOD then it all goes away. It is something with the AOD but I am sure Google will say it is a feature and not a bug. Thats if they even acknowledge it.
Duplicate Thread
This is being discussed at length here:
https://forum.xda-developers.com/pixel-3/help/pixel-3-screen-flash-t3859441/page3

replacement screen doesnt unlock after screenlock

Hey guys.
I replaced my camera module and since in this process i broke the screen, i also replaced the display.
now the display works, but is ghosting, and even worse, when the display is turned of for a running phone, the screen will remain black.
When i restart, the screen works, the blackscreen comes only when i turn the screen off or screenlock kicks in
any ideas would be appreciated!

LCD Problem

Hi all,
i really dont know what happened to my phone. the screen turns black instantly after showing the samsung logo on the start up i tried to reflash a fresh firmware but didnt do the job. the screen is showing the download mode also but after restarting and showing the samsung logo the screen turns to black. sometimes it flickers and shows some of the screen but turns off instantly
is there any fix to this ? does my phone encountered a water damage ? i tried the water damage test on the sim tray but the sticker seems to be on its original state no water damage at all any assistance would help i hope the lcd is not broken my country is on a lockdown and service centers open at this moment. i really need the phone for my work
Thanks
you have to turn on AOD to fix this I guess because I had a similar issue with my screen so a temporary fix is to turn on AOD then press power button screen will work fine pressing the power button directly when the screen is off flickers it and the screen turns completely black after a weird yellow flash.

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