Top and Bottom of screen has gray bars and has yellow tinge.

Been going on for a few months, the iPod touch screen has some gray lines, but not perfectly straight lines across the whole screen, the grey blob/lines are sort of curved (not that noticeable on image for bottom bit, can slightly see it one the top).

The gray lines/blobs have also moved and shifted over that time. Lines are unaffected by orientation or what is displayed. When the iPod is locked and screen off, the blob is still visible, just. There is also a visibly noticeable yellow tinge on the screen as well around the top half of the screen.

I have replaced the iPod but it holds some significance to me so I'd like to repair it if at all possible. Any help would be greatly appreciated.

Photo of it (few months ago taken)

http://img140.imageshack.us/img140/3917/...