As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A/C WAS ON DESCENT WHEN A BURNING SMELL WAS NOTICED COMING FROM SEAT 20E VDU. THE IFE SYSTEM WAS DEACTIVATED. MAINTENANCE REPLACED THE VDU AND THE SYSTEM WAS TESTED SERVICEABLE. THIS COMPONENT WILL BE RETURNED TO THE MANUFACTURER AND A COMPLETE TEAR DOWN REPORT WILL BE REQUESTED.