I am using a Galaxy Note 8 and facing the same issue. I'm not an expert in fixing tech but I suspect this is software related and not hardware. This is why:In the beginning, when the screen gets discolored, I can see burn in towards the middle of the...
@ ZeroAlpha
"To my luck this evening I updated my phone to January security patch & it seems to fix my display issues. I noticed the differences right away, no more discoloration & lines. Before the update I noticed dark grey is the most noticeable ...