Hi all, I could use some troubleshooting advice.
My AVR-3808CI recently started having a problem. When connected to my HTPC, if I am at the desktop then the video passes through ok, but as soon as I play sound, I get a loud "pop", and the receiver switches off and flashes red. This also happens sometimes when I change inputs on the receiver using the knob, even if I change to an input that is not connected to anything. Another time this happens is when I reboot my HTPC, just the "taa-daa" Windows boot sound causes the receiver to turn off.
The owner's manual suggests this is caused by temperature too high, short circuit in speaker wires, or a damaged receiver. The receiver is moderately warm but this has been normal as long as I've owned it. My speaker wires are terminated with banana plugs. I tried unplugging all speakers except one, and verified that the wires were ok. Same problem.
I tried using a different receiver from another room. I could only test the front speakers, but everything seemed to work ok. I tried using the Denon but with a computer monitor instead of my projector. Same problem. I tried a different video source (PS3), and had the same problem.
Any other troubleshooting suggestions before I replace the receiver?