I just got a new Vizio LCD HDTV a few days ago. I can play video games on the T.V without any problems but for some reason when I try to watch DVDs the picture blanks out every few seconds but the audio still remains. Although, half the DVDs I own work perfectly but then the other half of my DVDs black out. Not sure why some of my DVDs do this and others don't? How do I fix this? Also, I do not have cable hooked up to this television. Just a dvd player and a video game system.