As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE SITTING AT GATE ON APU PWR STRONG ELEC SMELL FROM CA SIDE THEN CA PFD WENT OFF. FEW MINUTES LATER PFD CAME BACK ON STRONG ODOR. SHUT OFF AC POWER TO AIRCRAFT. SWAPPED FO'S MFD AND CA PFD BACK TO ORIGINAL LOCATIONS. REMOVED AND REPLACED CA PFD IAW AMM 34-22-01. OPC GOOD. MEL RESTORED