As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JUST PRIOR TO ENGINE START, FLIGHT DECK BEGAN TO SMELL OF SOMETHING ELECTRICAL OVERHEATING. ISOLATED TO APU PANEL RT SIDE CONSOLE. FOUND APU FEEDER PROTECTION RELAY SHOWING SIGNS OF EXCESSIVE HEAT. REMOVED AND REPLACED FEEDER PROTECTION RELAY IAW W/M 20-10-00. OPS CHECK OK.