As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PRE-FLIGHT, STANDBY POWER OFF LIGHT ILLUMINATED. FOUND STANDBY BUSS 115 VC AC IND CIRCUIT BREAKER TRIPPED. RESET CIRCUIT BREAKER. PERFORMED GROUND OPERATION VERIFICATION OF STANDBY POWER SYS. OPS NORMAL. NO HISTORY 30 DAYS. STANDBY POWER OFF LIGHT REMAINS EXTINGUISHED.