I have discovered while watching TV that there is a "swipe" going thru the middle of my screen ( it appears to be a light purple hue) you cannot see it on the sceen while the TV is off. I asked my cleaning lady if she had used anything on the screen and she claims not to have. I used a clean cotton clothe and gently wiped across the whole screen with no results. Could the screen be damaged from a cleaning product and if so, is there a solution ? Or could it possibly be something else. I have only had the TV 2yrs.
It sounds like maybe the screen was pressed against or it was leaned on. I have seen this problem a few times. If it does not correct itself in a week or so, most likely a new display panel will be needed. Good Luck