Yesterday I hooked my Macbook up to my flatscreen using a VGA display adapter to watch Family Guy like I always have. But as soon as I enter full screen in ANY video player (VLC,Toast,Quicktime,etc.) my laptop display goes nuts and fills the screen with horizontal lines in different colors, on top of fuzzy nonsense. The TV display continues to play the videos how it's supposed to. The only way to get my Macbook display to start working again is to restart it or just close and re-open the Macbook. Any suggestions?