As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT WAS GROUNDED. FLIGHT ATTENDANT REPORTED ELECTRIC SMELL AT ROW 19 WITH HUMMING SOUND. FOUND NO ODOR FROM ENGINES OR APU. FOUND ACRID ODOR COMING FROM WIRELESS ENTERTAINMENT IN CEILING PER J/C 26L00021001. REPLACED KANDU (UNIT, KU BAND) PER LAPTOP. OPERATIONS CHECK OK. NO FAULTS NOTED.