Not sure how this happened, but every once in a while when watching cable (digital channels or regular) my screen will flash blue. I still hear the normal audio and like a *flash* kind of sound when it happens. It doesn't happen when i play video games or watch DVD's, only cable. I have a Scientific Atlanta box with S-video going to my receiver (Sony da3000es) and an s-video going to my tv (jvc). I checked all connections and everything seems fine. I've had everything set up for a couple months, and this started happening a week ago. Sometimes it will happen 3 times in 1 minute, and sometimes it wont' happen for over an hour of watching tv. Any Ideas??