I have a Gateway refurb and a Sansui sledvd449 hdtv. I'm using rca cables for my connection. About every other month, the picture drops from my from my PC. I've had this occur while watching YouTube videos, and the sound continues, though the picture is blank. The Sansui offers one line of info on this: If there is no video signal from the PC when the unit is in PC mode, “No signal” will appear on the TV-screen. Why would I lose my picture but not my sound?