JUST PURCHASED A NEW 1200D.HAD IT INSTALLED,PLAYED WELL FOR 3 DAYS.AND THE OTHER DAY,I GOT IN MY CAR,STARTED UP,TURNED MY HU ON,THE BLUE LIGHT LIT UP AND TURNED BACK OFF.WENT TO MY TRUNK,AND THE AMP WAS IN PROTECT.FIRST THING I DONE WAS DISCONNECTED MY RCA'S AND SPEAKER WIRES(STILL IN PROTECT)CHECKED MY GROUNDS(THEY WERE CLEAN AND TIGHT)CHECKED MY B+ AND GND(14.2V)CHECKED FUSES(NONE BLOWN)ALL WIRING SEEMS TO BE FINE.I CHECKED EVERYTHING FROM THE BATTERY TO THE AMP(HU INCLUDED)............ANYONE HAVE ANY IDEA WHAT MAY BE THE ISSUE?