As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION, FOUND EMERGENCY LIGHTS RT SIDE MAIN CABIN CAME ON IN FLT WENT OUT WHEN SEATBELT SIGN WAS TURNED ON FOR LANDING. MAINTENANCE FOUND CIRCUIT BREAKER TRIPPED DUE TO BAD POWER SUPPLY. REPLACED POWER SUPPLY AND BATTERY AT SEAT 23DEF IAW AMM 33-51. OPS CHECK GOOD.