As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - FLT 704 - EN ROUTE CLT TO FRA. ATTEMPTED REBOOT OF IN-FLIGHT ENTERTAINMENT SYSTEM IN FLIGHT AND GOT AN AUTO-SHUTDOWN DUE TO BULK AVIONICS SMOKE LIGHT (INDICATION). THIS CAUSED OVERHEAD LIGHTS AND CALL BELLS TO FAIL. THE FLIGHT DIVERTED TO PHL AND LANDED WITHOUT FURTHER INCIDENT. PERFORMED A RESET ON SDCU ONE AND SDCU TWO. REMOVED AND REPLACED SMOKE DETECTION CONTROL UNIT (SDCU).