Report "I just bought and set up a older model but new NAD T963. While unplugged from the power source I connected main speakers, center channel, and a subwoofer. I then connected video out to tv for set up menu, followed by power cord. I then turned on the system, went through the set as instructed by the manual and I get no sound from any source. The on screen display works. Remote navigates perfectly. I put tuner to local station, it shows being tuned. No sound. What am I missing?"