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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 setting is on. The Auto Standby mode switches the unit to standby mode when there is no audio input and the unit is not operated for approximately 30 minutes. To disable the Auto Standby mode, press and hold the AMP POWER 
button for more than 5 seconds when the Auto Standby mode is enabled. link
The power turns off and the power indicator shows one long blink and four short blinks in red.
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. link
Please re-install this unit in a place having good ventilation.
The power turns off and the power indicator shows one long blink and five short blinks in red.
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
Turn down the volume and turn on the power again. link
When the power is turned on, the power indicator shows one long blink and three or six short blinks in red.
This unit’s amplifier circuit has failed. Unplug the power cord and contact our customer service center.