Hi all, im looking for advise on what these marks are caused by, the pictures show the screen, ive turned the contrast right up on a black background to highlight the problem. when in normal use the area ive boxed shows up as a lighter section of colour from top to bottom with the darker curved part, with a very noticable difference between the two shades. all other areas look fine. is this bleeding? can anything be done? is the backlight adjustable? (if that would help), i know how to get to the service menu but dont really understand all the adjustable options. any advise/help would be nice!