Someone, that was me, I think Component would help. It sounds like you have the connections all mixed up, and you should start all over again. I don't think the DVD Player will work over Coax, so you must have Composite hooked up, that's the Yellow RC Cable. So I think you should pull everything down and look at your User Manuals and hook it back up logically. Think of everything you want to hook up as the Source, and your TV Display as the Input for all this. Your Receiver handles the Sound for all these components. It sounds like you have some double connections and not going through your Receiver first.