[Q] Screen switches on and off at regular intervals - Galaxy S 4 Q&A, Help & Troubleshooting

Hi,
This morning my S4 started to continually activate the screen for about 5 seconds then deactivate it for 1 second and repeat the cycle continuously. This happens even when I press the power button to shut down the screen or leaving the phone idle and when charging/not charging.
I have switched off all the smart screens, motions and gestures and I have done a hard\factory reset with no change!
Would you have any ideas what's gone wrong or is it likely to be a hardware issue.
Thanks

Related

8125 stuck with no disply

Today I had an alarm set, when the alarm went off I tapped hit the power button on the top of my phone to turn the screen off (and hopefully the alarm... but only the screen went off). The alarm continued to go, but no matter what I did, I couldn't get the screen to come back on.
I can fully interact with the phone (as if the screen was on). For example, pressing talk twice redailed my last call. Pressing power prompted to shut the phone off (could hear the "blurp"), etc.
So, after shutting the phone off (or resetting with pinhole reset), the display works fine while it is displaying the "Cingular - Raising the Bar" nonsense. As soon as that screen is done (where it would have normally showed the today screen), the screen just goes off...
Any ideas?
-Shaun
nevermind, when I put it under a bright light I realized the screen was on, the backlight was just off... somehow I must have hit some shortcut to turn the backlight off.
-Shaun
PEBKAC
Don't sound too relieved...
Say hello to the Backlight bug.
You're backlight will keep setting itself to the lowest setting after every soft-reset, when you let it go into stand-by itself.
I'm still sufferering from it. It started when i first installed PocketZenphone.
So just want to give u a warning. Everytime you reset your phone, remember not to let it go into standby itself. Either tap the power button and turn the screen off, then turn it on agan. Otherwise, the Backlight will go to low again.

Screen blank on startup! help (resolved)

My x10i hanged when making a call, had to remove the battery.
Now the problem is the damned phone wont startup. I get the vibration from pressing the startbutton and the screen turns on (if tilted you can see the "backlight") but then nothing absolutely nothing happens, dont react on any keypresses after the "startup".
Tried removing battery for extended period but no change phone just wont go any further then
1 vibrating on startpress
2 turning on backlight on screen
any tips help would be apretiated.
after 10 consecutive batteryout and restart the phone magicly started again but seems like serius software errors so will have to reroot

Lock Screen won't turn off

Hi there. I'm currently having an issue with my S7 edge where the lock screen won't turn off after some time. The screen does turn off when I'm using the phone normally from the main screen after some time passes but it's just the lock screen I have issues with.
Whenever I charge my phone or just hit the power button once to see notifications on the lock screen, it'll just stay like that until the same time the main screen timeout configured time passes (5 minutes) and this is getting annoying and somewhat draining a little bit more of my battery. Previously it was working fine and the lock screen would turn off after around 10 seconds or so.
Has anyone faced any similar issues with their phones? I haven't tried a factory reset yet but I'd want that to be a last resort.
Clear Background apps.
It happens when you left some games or apps by pressing home button but it keeps running. Hope they will fix this soon.
Have you tried pressing that little button on the right side of the phone? That usually helps.
Yeah...I already tried that with no luck. Even tried uninstalling some recent apps in case one of them was cause but it didn't work either. Any other suggestions?
The issue isn't with turning the phone screen off by pressing the power button, it's the lock screen itself not turning off after a few seconds when it usually does.
I'm having the same problem, had good lock installed thought that may have been the problem but after uninstalling that I'm still having the same problem with samsungs oem lock screen. I too would like an answer or fix for this. also to note, in developer options the stay awake is off and no apps running in the background.
I am having this problem now also. The screen will lock, but the display stays on but dimmed. I can tap the screen and it will get bright. Now I must click the side button every time I set my phone down or the screen will drain the battery.
I'm facing exactly the same issue. When the screen is locked, it stays on for the same time confirmed to when its unlocked. For example, 1 minute, instead of 10-15 seconds.
Any workaround discovered for this?
Did anyone find a solution to this problem?
I thought that I might've been the only one! This problem only appeared on my phone after the Nougat update, and it's extremely annoying as I rely on notifications waking the screen for my main messaging app.
joelnet said:
I am having this problem now also. The screen will lock, but the display stays on but dimmed. I can tap the screen and it will get bright. Now I must click the side button every time I set my phone down or the screen will drain the battery.
Click to expand...
Click to collapse
Hello, I am having the same issue in my Redmi note 11 pro plus Phone. In my case The screen will lock but display stays on with dimmed light. Usually it is not visible during day, but in dark room its visible. And it stays the same way whole night. And battery is fully drained and phone is turned off. Is there a solution for this??

Screen randomly stays blank after hitting power button N900

I've got a strange problem with my Sprint Galaxy Note 3.
What's happening is that randomly when I hit the power to turn the screen back on, it will do nothing then the screen will stay blank. The phone clearly still works because if I'm on a call or listening to music it will still keep playing and the volume and other buttons continue to work.
When that happens I hold down the power to turn the phone off and then on and it boots up normally.
Rarely what will happen is the same behavior except the screen will go strangely green after I hit the power button, making the phone unusable until an off/on.
This happens sometimes multiple times a day, sometimes days without happening.
Phone is rooted, running OC5 on Android 5.0. Problem has been happening for months. Haven't made any system upgrades or installed any major apps so that isn't it. I'm thinking it is some kind of loose pin/wire but don't want to crack the phone open without a plan.
Any help appreciated!
You are in the wrong forum .
Go to Sprint forum .https://forum.xda-developers.com/galaxy-note-3

Hello everyone please help request

Recently there is a problem with the device. The power button does not turn the device on and off, sometimes vibrating but the screen does not wake up even when connected to the power supply.
Double tapping does not respond. Sometimes the screen will turn on for a second and turn off.
Sometimes everything looks right.
When this happened, the device warmed up around the power switch.
So I replaced the lighting component and now the problem continues random without the device warming up.
Does anyone have any idea what the problem might be and how to solve it?
Thanks so much everyone.

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