Originally Posted by Yamaha YXZ
So what is the problem if these resets don't work?
Call a tech?
I figured you have, but verify the circuit breaker hasn't tripped. When I lose a zone, usually that's the cause in my rig. And I think I had to do the complete power shut down once. Killed all 110 commercial AND 12v power for about an hour (it says 20 minutes, but I did an hour), then returned and began the procedure, and everything worked as advertised again.