As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A FLIGHT FROM KAAF TO KLUL, THE NR 1 GARMIN BECAME INOPERATIVE. RETURN TO ORIGIN NO INCIDENT. FERRIED TO KSGJ FOR REPAIR. FOUND CB FOR PARTIAL POWER OF MAIN BUSS OPEN. RESET CB. GROUND CHECKED GOOD. LEFT KSGJ FOR KMLB AND THE CB TRIPPED AGAIN. FERRIED THE AIRCRAFT BACK TO KSGJ FOR REPAIRS AGAIN. REPLACED THE ENTIRE MCU, OPS CHECKED SATISFACTORY.