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Resetting the Component from the Front Panel
If disconnecting and reconnecting the power doesn't help, a few manufacturers provide instructions about resetting a component by simultaneously pressing multiple buttons on the front panel. Consult the Owner's Manual or contact the manufacturer directly for instructions. Be aware that resetting the microprocessor will erase any settings you may have entered. For example, if you have set the volume levels for each of the channels those settings will be deleted and you will have to enter them again. If this fails the component is possibly defective and may need repair. Contact the manufacturer or service center.