Thank you, I will try inspecting the fuses. The unit was on when the power went out.
Yes, I believe to some degree it is always on. The standby light flashes no matter what and there is no master power switch on the rear panel. The only way to make the standby light stop flashing is to press the "tone" button as this is what you press in combination with standby to reset the unit. As soon as you press "tone," the standby light stops flashing.