I have a 6 y/o Panasonic 32" and whenever I play a DVD I get a yellow discoloration on the right side of the screen and a blue on the left. If I shut the DVD off it goes away but it always comes back. Of course it is very noticable when those areas of the screen are light. I first noticed it while playing Star Wars: AOTC during the scene when Anakin and Padme are on Tatooine. I do not get this problem during regular SD sat viewing or on any gaming systems. Just during DVD viewing. What could this be caused from???