I just got a bigscreen (sony kp53v80) and when I hooked up my xbox it flashes red across the screen like its having problems with the signal. I hooked up my PS2 and it works fine, same with my dvd, tivo,etc. All hooked up with s-video. I hooked up my XBOX to another tv and it worked fine. It just wont work on my bigscreen. I have tried composite as well as s-video on several connections. Any ideas.