As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 721, FCO - CLT - PASSENGER REPORTED SLIGHT ELECTRICAL BURNING SMELL FROM VIDEO AT SEAT 31E TURNED OFF UNIT FOR DURATION OF FLIGHT. MAINTENANCE COULD NOT VERIFY. OPERATED SYSTEM AT NOTED SEAT CONTINUOUSLY NOTING NO ODOR. INSPECTED SEB'S AT LOCATION 30E/31E AND SEAT CABLING NOTING NO FAULTS. REPLACED MONITOR ASSEMBLY AT SEAT 31E AS PRECAUTION.