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So I think what happened is my screen to motherboard cables have been disconnected. Sometimes it works most times it doesn't. When I shake my phone a hear a little noise of something loose.
First thing you should do is to boot your S7 Edge in safe mode to temporary disable all downloaded apps and third party apps then wait and observe that how your mobile screen is behaving like now. To boot your phone in safe mode you have to follow these steps carefully:
Press and hold the Power key.
As soon as you can see the ‘Samsung Galaxy S7 EDGE’ on the screen, release the Power key and immediately hold the Volume Down key.
Continue holding the Volume Down button until the device finishes rebooting.
You may release it when you can see ‘Safe mode’ in the bottom left corner of the screen.
Is it still flickering or not? If the problem is still there then what you need to do is try to delete the cache of your previous system. Because it could be an issue with the new firmware or possibly a hardware problem. Your new system might be using the previous cache and it is causing the problem and now you need to delete that cache from previous system. Here is how you are going to do that:
Turn off your Samsung Galaxy S7 Edge.
Press and then hold the Home and Volume UP keys, then press and hold the Power key.
When the Samsung Galaxy S7 Edge shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
Using the Volume Down key, navigate through the options and highlight ‘wipe cache partition.’
Once highlighted, you may press the Power key to select it.
Now highlight the option ‘Yes’ using the Volume Down key and press the Power button to select it.
Wait until your phone is finished wiping the cache partition. Once completed, highlight ‘Reboot system now’ and press the Power key.
The phone will now reboot longer than usual.
If you are still facing the same problem even after all these efforts you might be facing some serious firmware or hardware issue. I am not sure in this kind of state you can backup your data and files because now the only option left is a "Master Reset" as it is the only solution now that can make your phone leave the new firmware installed and go back to its default settings and you must need to do it before visiting a technician. That's all I can say in this matter. I wish you a good luck. Thank you!
Post was last edited on October 1, 2018 1:05 AM PDT
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