I have a Denon AVR-800 Receiver and a Denon DCM-340 CD Disk changer. The other day I was listening to a CD and when I went to increase the volume up to about 1/3 the way, the receiver shut off. All I get now is the red light on the "Standby Light" when I turn it on and when I turn it of the Standby light flashes. Nothing on the panel shows up and nothing will play. Anyone know what is wrong with it and is it worth fixing or am I better off buying a new unit?