As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLIGHT, THE CREW REPORTED THE OVERHEAD LIGHT AT 12C FLASHING OFF AND ON WITH A BURNING ELECTRICAL ODOR. MAINTENANCE REMOVED AND REPLACED DIODE BOARD FOR THE PASSENGER SERVICE UNIT AT SEAT 12C IAW CMM. OPS CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)