As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE BEGAN COMING FROM THE ELECTRICAL CLOSET NEAR FORWARD ENTRY DOOR WHILE ON APPROACH TO LAX. THE ENTERTAINMENT SYSTEM WAS SHUT DOWN AND THE SMOKE CEASED. MAINTENANCE FOUND THE VIDEO SYSTEM CONTROL UNIT AT FAULT. THE UNIT'S C/P'S WERE DISCONNECTED AND ENTERTAINMENT CIRCUIT BREAKERS IN COCKPIT WERE CAPPED. THE ENTERTAINMENT SYSTEM WAS PLACARD INOPERATIVE.