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Power does not turn on / Power is turned off
Power is not turned on.
Check whether the power plug is correctly inserted into the power outlet. link
Power automatically turns off.
The Auto Standby mode is on. When approx. 30 minutes pass with no audio input and no operations on the unit, this unit automatically enters the standby mode. To turn off the Auto Standby mode, press the AMP 
button for 5 seconds or longer. link
When this unit and a Marantz audio device compatible with the power synchronization function are connected using a remote connection cable, the power of this unit turns off (standby) in synchronization with the power off operation of the device connected to this unit. link
The power turns off and the protection circuit indicator shows one long blink and two short blinks in orange.
Stop playback on the playback device, and then turn the power off and on again.
If the problem is not solved by turning the power off and on again, this unit’s amplifier circuit has failed. Unplug the power cord and contact our customer service center.
The power turns off and the protection circuit indicator shows one long blink and three short blinks in orange.
This unit’s power circuit has failed. Unplug the power cord and contact our customer service center.
The power turns off and the protection circuit indicator shows one long blink and four short blinks in orange.
The protection circuit has been activated due to a rise in temperature within this unit. Turn the power off, wait about an hour until this unit cools down sufficiently, and then turn the power on again.
Please re-install this unit in a place having good ventilation.
Check the speaker connections. The protection circuit may have been activated because speaker cable core wires came in contact with each other or a core wire was disconnected from the connector and came in contact with the rear panel of this unit. After unplugging the power cord, take corrective action such as firmly re-twisting the core wire or taking care of the connector, and then reconnect the wire. link
Stop playback on the playback device, and then turn the power off and on again.
The power turns off and the protection circuit indicator shows one long blink and five short blinks in orange.
Stop playback on the playback device, and then turn the power off and on again.
If the problem is not solved by turning the power off and on again, this unit’s amplifier circuit or power circuit has failed. Unplug the power cord and contact our customer service center.