What was found
SEAT AUDIO INOPERATIVE 20A FAULT CONFIRMED FOR USB INOP AT SEAT 20A. ATTEMPTED TO R&R USB PORT NO HELP. RETURNED PC TO ORIGINAL CONFIGURATION. NOTED, A BURNT SMELL COMING FROM HARNESS. UNABLE TO REPLACE HARNESS DUE TO DEPARTURE TIME AUDIO IS ALSO INOP DUE TO HARNESS ISSUE TO SEAT. WORK DONE IAW B787 AMM REF. 44-25-00-50A-320A-A. DISCONNECTED AND CAPPED HARNESS SO THAT NO CONNECTION TO SEAT. THERE IS NO POWER TO HARNESS. .OK TO DEFER USB PORT AT SEAT 20A PER NEF. CONFIRMED HARNESS IS ISOLATED AND ALL OTHER IFE SYSTEMS CHECK OK. FWD TO NEF