When an abnormal current is output to the SPEAKERS terminals, or when the internal temperature of the USB DAC AMPLIFIER is too high, etc., all the input indicator lamps flash for 5 seconds, and the USB DAC AMPLIFIER turns off automatically.

• Check the connection of the speakers and then turn the power on again.
• Check the location of the USB DAC AMPLIFIER, and place the unit in a location with adequate ventilation so as not to block the ventilation holes, and then turn the power on again.