What was found
ELECTRICAL ODOR AND SMOKE REPORTED IN AFT CABIN. FLIGHT DIVERTED AND LANDED UNDER AMBER ALERT INTO SNN (SHANNON, IRELAND). MAINT CHECK SEAT FOR FAILED SEAT VIDEO DISTRIBUTION UNITS IN AFT CABIN AREA. SUPPLEMENTAL DATA UPDATE THE VIDEO DISTRIBUTION UNIT AT SEAT 35FG FAILED. THE UNIT AND THE ASSOCIATED SEAT TO SEAT CABLE WERE REPLACED. THE UNIT WAS OPENED AT THE COMPONENT SHOP AND FOUND TO HAVE DAMAGE TO THE POWER SUPPLY. PRELIMINARY REPORT INDICATES A SHORT IN THE POWER SUPPLY. EXACT CAUSE WILL BE DETERMINED AT THE VENDORS FACILITY.