Contribution d'origine par : Tim ,
Those marks are from something pressing on the back of the backlight. Maybe check if the frame is straight, check the metal plate on the back of the glass for any dirt, tape or glass. Did the metal plate sit in nicely before screwing it in? You didn't need to bend the tags, or no pressure? Does the screen do it while it's out of the frame? Otherwise you may be able to gently heat the screen with a hairdryer to about 60deg C or 140F, let it cool and test again.