If composite video fails, it's time to arrange for service.
I've had a Vizio VA320M for just over a year now, and it has recently had a problem with the video and audio skipping, like a damaged DVD or CD. It isn't a problem with the cable or any game systems I have hooked up, because it does it with every input, and even affects the TV's menu when I bring it up. I've tried resetting all of the settings to the factory default, and looked at the picture settings, but still nothing.
Is there anything I can do, or is it beyond hope?