As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEAT 11D, E & F THE VIDEO & AUDIO INOP. CREW SMELLED SMOKE IN THAT AREA BEFORE TAKEOFF. MAINT CKD BUT DIDN'T FIND OR SMELL ANYTHING. FOUND VDB ITSELF SMELLED A LITTLE, REPLACED VDB AND VIDEO WORKS BACK TO NORMAL. SMELL DID NOT OCCUR WHILE ON GROUND.