As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER DEPARTURE EXPERIENCED SMOKE IN CABIN FROM ENTERTAINMENT SYSTEM UNDERSEAT ELECTRONIC UNIT AT SEAT 17AB. AIRCRAFT RETURNED TO FIELD. *S/D* FILTER CAPACITORS IN THE POWER SUPPLY FAILED CAUSING OVERHEAT DAMAGE TO THE CIRCUIT BOARD. THE VIDEO DISTRIBUTION BOX (VDB) WAS REPLACED WITH NO FURTHER PROBLEMS.