As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE VIDEO SCREENS AT RG/F WENT BLANK FOLLOWED BY SMOKE AND FUMES FROM 4G. MASTER POWER TURNED OFF AND SMOKE/FUMES DISSIPATED. AIRCRAFT LANDED LGW WITHOUT INCIDENT. MAINTENANCE DISCOVERED AVU OVERHEATED. REPLACED AVU. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)