As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRIOR TO DEPARTURE THE CREW REPORTED AN ELECTRICAL BURNING ODOR IN THE CABIN, NO SMOKE WAS VISIBLE. FOUND INDIRECT CEILING LT POWER SUPPLY U/S AND INBD CEILING LTS AT ROW 34/35 U/S. POWER SUPPLY REPLACED, LIGHTING RESTORED. ODOR DISSIPATED.