My Panasonic HDTV 1080i (about 7 yrs old) has discoloration where the screen almost looks too bright and the colors are not showing as they used to, everything appears very light. I've messed with the picture settings on the TV to no avail. I also just dropped $100 on a new lamp, but that made no effect on the problem. Any suggestions on what this might be and how i can fix it? Thanks!!!!!