As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REPORT OF A VERY FAINT SMELL OF SMOKE IN VICINITY OF SEAT ROW 22 OVERHEAD. NO VISIBLE SMOKE. SHUT OFF NON ESSENTIAL ELECTRICAL EQUIPMENT PER QRH, GALLEY POWER, FLUORESCENT LIGHTS, ENTERTAINMENT AND OUTLETS. THERE WAS NO VISIBLE SMOKE AT ANY TIME. TROUBLESHOT PER FIM 21-00-00-810-806 SECTION I AND J. NO FUMES OR SMELL IN THE CABIN. AIRCRAFT RETURNED TO SERVICE.