Try turning off and unplugging it for a half hour or so. You really need to find the reason why it went into protected mode in the first place. Make sure your speaker wires don't have any stray frays when connecting to the binding posts and that they are connected correctly + to + and - to - . Make sure the receiver has plenty of ventillation - that it doesn't overheat. Has it just happened out of the blue or did you use it for the first time?