I am hoping someone can help! My samsung, about 3 years old, fantastic tv, by the way. Recently started making a grinding noise, sounds like a distant chain saw in the woods. When this starts up, the picture flickers black and white with red or green highlighting. Is it just the color wheel or the motor. My boyfriend said he heard the cooling fan stalling last night at shut off. This seems a little different than most of the threads I've read, because this will stop and she runs fine, then hits a certain point and starts doing it again. Would just like to know all the parts I should order to fix her. Any help would be appreciated.