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Power but no sound from my Yamaha RX-396 Receiver

All of a sudden, there is no sound output from my Yamaha RX-396 receiver. I have tried switching the speaker selector on and off, have tried it in cd mode as well as am and fm, but still no luck. Are there any diagnostics I can do to pinpoint the problem?



Power but no sound from my Yamaha RX-396 Receiver

The protection relay may not be coming on; there could be a problem in one or both channels. The service information is in the library here.
Could be something simple like poor connections in the audio amplifier, or bad capacitors or transistors.

Power but no sound from my Yamaha RX-396 Receiver

If the relay is clicking on, I'd look to see if there's any power at all on the preamp stages... Yamaha like to run their regulators real hot and sooner or later, the solder joins will crack up and fail.