I've got the exact same problem. Can't get sound out of anywhere. I've tried optical, coax, analog, (from several sources) and the test tones, and haven't heard a thing.
I've got a Parasound HCA 2003 for the front 3 channles, adcom 535II for rears, and a mackie m1400i for the sub. Sources I've tried are a Toshiba dvd player, Sony ld, cambridge audio cd player, and a Sony PS2.
[This message has been edited by dcg (edited September 14, 2002).]