I bought a YHT-4930UBL 5.1 Surround Sound system. Did the test on the speakers and they all work fine. Can get the fm radio to work, but can't get any sound from my Sony flat screen tv. I am using Dish TV with the Joey hopper, so I actually have 2 satellite boxes hooked up to the tv, plus the Yamaha receiver. I have to use the tv speakers when watching tv, when I try to use the surround sound speakers I get nothing. What's wrong?