As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED UPON AIRCRAFT SHUTDOWN FOUND THE MFD NO1 REMAINED POWERED ON AFTER AIRCRAFT BATTERIES WERE TURNED OFF. THE MAINTENANCE VENDOR TROUBLESHOT AND FOUND RELAYS 3931K3 AND 3931K4 DEFECTIVE. THE RELAYS WERE REPLACED WITH NEW. FUNCTIONAL CHECKS WERE SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE.