My Amplifier's Protection Light Is On

If the protection LED is illuminated, this indicates that the amplifier is in protection mode due to a fault condition. There are numerous causes for this which may mean the Amplifier will need to be inspected and diagnosed by a technician. It may also be a speaker or sub-woofer causing the fault condition.
To eliminate this as a possible cause, disconnect the speakers or sub-woofer from the output of the amplifier. If the amplifier still goes into protection mode with nothing connected to the 'out' terminals, this indicates a fault with the amplifier.