I have a mitsubishi WS-55411. the picture is fine then turns black and white. Sometimes it will change back if i put a fan behind it. it also happens when i switch imputs like tv to play station or to dvd. but im sure its not a imput or plug problem. is there a fan in there? where is it, and what shouldnt i touch so i dont shock myself? email me harrysackman@aol.com