I have my cheap dv camcorder hooked up via firewire to import footage. I also run a cable out to my small tv to view the footage externally while i edit. Just recently now when I try to watch the footage these huge gray squares start crossing the screen from the top left corner to the bottom. I can see my footage on the screen but the sqaures (almost like huge pixels) keep raining across. Anyone have any idea whats going wrong here?