I just picked up a new Yamaha RX-A820. As I am connecting devices I connected a CD changer to the AV4 optcal input and no sound. I switch it to AV1 and now I hear music. I have tried a couple different optical cables with no difference. The 2 coax connections work fine as do the AV5, AV6, Audio1 and Audio2. Anyone else have this problem?









