HI all. I went to get gas tonight. Rockin' out to The Who. I shut the car off and reached to open the door when all of a sudden the sound completely cut off. I tried switching off and on the radio no dice. It's a factory Monsson amplifier with a factory nav unit. The nav unit appears to function normally and makes beeps when you press buttons. I did notice that the DIC warning chimes and door buzzer seem muted, a lot softer than before. Do these amps just die like that or did Keith Moon blow a fuse?