This has effected me for a while and I don't know what causes it. I have a Panasonic 27" TV that buzzes depending on what is on the screen. Actually, I'm not sure if it IS the TV. When whatever is on the screen displays a lot of white, I hear an underlying buzz. When the scene switches to something non-white, the buzzing stops. This is really evident when I watch a hockey game. When the camera fills the whole screen with a wide angle of the white ice, it buzzes. When the camera pans to one end, the buzzing stops (because the whiteness is replaced by fans in the stands. I thought this was some sort of cable issue but last night, I was watching my new "Barton Fink" DVD and in one scene, the buzzing started. There was a lot of white on screen. Of course, when the scene switched the buzzing stopped. I watch DVDs with all audio coming from the 5.1 system and the TV receives no signal for audio at all. I muted the TV and the buzzing continued so now I'm thinking its coming from my center channel. The problem is I get the buzzing from network TV which comes though the TV speakers and the stereo is OFF. Help! This buzzing drives the wife nuts.