Just got my 563A today connected it to my adcom 740 pre/pro by coaxial and got no sound. Good picture but no sound. The only way I can get sound is if I switch to another source, vcr, cd etc, and then switch back to DVD on the adcom, then I have sound and no problems. I had an old pioneer DV414 before that did not have this problem. Anyone else experience this or is there a setting on the 563 that I didn't set. Thanks all.