As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ABOUT 2.5 HOURS AFTER TAKEOFF AN ODOR APPEARED IN THE FORWARD CABIN IN THE VICINITY OF ROWS 4-5. A SOURCE WAS NOT FOUND. THE SMELL MOVED AS FAR AS ROW 2 THEN DISSIPATED WITHIN 15 MINS. THE SMELL WAS CHEMICAL NOT STRONG. THE VIDEO CONTROLS FOR SEATS 5C AND 5G WERE LOST. FOUND BURNT SMELL FROM SEAT 5 C/G AVU. REMOVED AND REPLACED SEAT AVU, OPS GOOD RAN FOR 2.5 HOURS.