Why does my Yamaha rx685 speakers shut off?

If another unit is displaying the same behaviour then it is more than likely being caused by an external issue with either the speakers you’ve connected or the power supply to the unit. There’s no reports of an inherant problem in association with this receiver that would explain or account for the issue you are having.

What to do when your home theater receiver keeps shutting down?

Disconnect one of the speaker wires from the back of the receiver. If it shuts down again then disconnect another one. Keep doing this until it stays on or you run out of wires to disconnect. Also, make sure all speakers are set to Small in the setup menu and the crossover to 100 or higher regardless of what speakers they are or how big.

Why does my Yamaha receiver keep shutting down?

Yamaha receivers (like many) will shut off/go into protect mode if there is a short or if a speaker is not properly connected. And, as Robert noted above, they will also shut down if there is not enough available current to properly power the amp during loud passages. You need to determine the reason your receiver is shutting down.

How to turn on and shut off home audio?

Disconnect all speaker wires from the amplifier, see if it still shutting off. If staying on, reconnect one speaker at a time, turn volume levels up and down as you add more speakers.

If another unit is displaying the same behaviour then it is more than likely being caused by an external issue with either the speakers you’ve connected or the power supply to the unit. There’s no reports of an inherant problem in association with this receiver that would explain or account for the issue you are having.

Yamaha receivers (like many) will shut off/go into protect mode if there is a short or if a speaker is not properly connected. And, as Robert noted above, they will also shut down if there is not enough available current to properly power the amp during loud passages. You need to determine the reason your receiver is shutting down.

Disconnect one of the speaker wires from the back of the receiver. If it shuts down again then disconnect another one. Keep doing this until it stays on or you run out of wires to disconnect. Also, make sure all speakers are set to Small in the setup menu and the crossover to 100 or higher regardless of what speakers they are or how big.

Disconnect all speaker wires from the amplifier, see if it still shutting off. If staying on, reconnect one speaker at a time, turn volume levels up and down as you add more speakers.