As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, THE APU FIRE PUSH BUTTON AND BOTH ENGINE PUSH BUTTONS BEGAN TO FLASH. THE APU P/B FLASH WAS BRIGHT AND THE ENGINE P/B'S FLASHED FAINTLY. RETURNED TO DEPARTURE FIELD AND LANDED OVERWEIGHT WITHOUT INCIDENT. MAINTENANCE REPLACED THE ENGINE/APU FIRE PANEL. OPERATIONAL CHECK OK.