As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - CREW REPORTED ELECTRICAL SMELL FROM POWER PORT/LIGHT AT SEAT 4B. LIGHT BETWEEN SEATS 5A/B FLICKERED TOGETHER ON AND OFF. TURNED POWER PORT OFF BUT SMELL CAME BACK. EMERGENCY DECLARED FLIGHT RETURNED MIA LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND READING LIGHT AT SEAT 5B SHORTED OUT. REPLACED 5B WORK TABLE LIGHT AND SWITCH. SYSTEM GROUND CHECK NORMAL OPERATION.