What was found
THE CREW REPORTED THAT AT LEVEL CRUISE AT FL360, F/O PFD WENT RED, THEN BLANK AND THEN HAD AN INTENSE SULFUR/ELECTRICAL FIRE ODOR OCCURRED IN THE COCKPIT. THE ACFT LANDED WITHOUT INCIDENT WHERE CONTRACT MAINTENANCE PLACED THE F/O PFD ON MEL 34-22-01-01, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE. LATER, MAINTENANCE R & R THE F/O'S PFD, OPERATIONALLY TESTED WITH NO DEFECTS NOTED, CLEARED THE MEL, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.