As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FIRST OFFICER AND FLIGHT ATTENDANT REPORTED A STRONG SMELL OF AN UNKNOWN SOURCE AFTER THE IN FLIGHT ENTERTAINMENT SWITCH IN THE FLIGHT DECK WAS TURNED ON. FOUND NUMBER 1 WINDOW HEAT CONTROL UNIT (WHCU) BURNED AND CIRCUIT BREAKER POP. REMOVE AND REPLACED WHSCU. PER AMM 30-41-11. OPERATIONAL CHECK GOOD.