Unfortunately my equipment had to be packed away for about 7 years due to mother moving into our house and taking over my media room. We have reconfigured the house and i am at least gaining a music room. I still have some old equipment which includes a Denon 2910 DVD player and Sony STR5000 receiver. Here is my problem. I am trying to play some SACD's and DVD-audios...yes I have a few..but sound will not come out of center or rear speakers or subwoofer. I tried multichannel direct, coaxial, and even optical. Nothing works. I know that use to work! Everything appears to be hooked up correctly. Any ideas? I don't even know where to start.