My surround sound has recently stopped working and I don't know why. Everything was working properly until I plugged up the yellow chord into the back of the DVD player that's labeled video out and now the surround system, does not work for my TV. It works for the DVD player but not the TV. I have Directv and a Sony surround system. Should i have plugged the yellow chord into the video out???? because that's the only way my DVD would show a picture because it kept saying no signal until i plugged that chord into the back of the DVD player. It wasn't plugged up to anything before then. PLEASE HELP