I swapped cables - no change
Swapped inputs on the power amp - no change
Plugged a different ZP into the power amp and everything worked great again
Tried the defective ZP with my AVR using the analog outs on the ZP to an input on the AVR and nothing again
Tried the defective ZP's digital (COAX) output into the AVR and it worked fine, I am assuming the Optical will work as well but haven't tried that yet.
So after eliminating everything else it certainly appears the analog outs are shot on the ZP 80.
Is there any fix for this?
If, not it's not tragic as I will move that ZP to the AVR and get another to plug into the 12 Channel AMP but if I can save it so much the better.
Unfortunately, the AMPS do not have digital inputs and I have 2 of those 12 channel amps driving all the zones and one ZP is also sending its digital out the the AVR.
Best answer by ratty
Why don't you just pick up a budget DAC and splice that between the ZP80 and your amps.