I've got a relatively new 32" TV. Once and a while I notice in the bottom right and bottom left corners of the screen the color seems off. If set the TV displaying a solid blue screen, I can see the two corners blend to yellow (or purple, or some other color). Now in front of the TV sits an electric heater (a new one). To the right of the TV sits my 15" Tempest subwoofer. Would these things be making my TV change color? (maybe magnetic fields or something). How do I solve this problem? Would this create permenant damage? Thanks. Jonny K.