4X4 Matrix Entertainment System

All of a sudden I can't get my DVD's to show on the TV's. What was working last time I used it is now not working. My built in DVD is one of the inputs to my built in 4X4 matrix entertainment system. The sound track plays on the surround sound system but no signal to any of the TV's. Am I forgetting something or do I have a malfunction? This is in a 2013 Winnebago Journey. Thanks.