What was found
PFD FAILED AFTER TAKEOFF STRONG BURNING ODOR FROM CAPT PFD UPON ARRIVAL & AFTER TAKEOFF CAPTS PFD WENT OUT THEN STARTED FLICKERING & A BURNING SMELL OCCURED. NO OTHER ECAM MSGS OR OTHER FAULTS NOTICED. CAPT TURNED OFF DISPLAY & SMELL CEASED, NO OTHER ISSUES EXPIERENCED. MX TURNED DISPLAY BACK ON & AFTER ABOUT 2 MIN OR SO DU FLICKERED & WENT OUT & BURNING ODOR OCCURED. TURNED DISPLAY OFF. REMOVED DU & FOUND NO EVIDENCE OF ARCING OR BURNING AT EITHER UNIT OR ACFT SIDE CONNECTORS, GOOD AIRFLOW FROM AVIONICS COOLING VENT PRESENT, NO BURN MARKS ON DISPLAY RACK. INSPECTED IN AVIONICS BAYS & CARGO BAYS, NO EVIDENCE OF BURNING OR ODORS NOTED. REPLACED CAPTS PFD (2WT1) IAW AMM 31-63-22. OPS CHECK WAS GOOD. WATCHED DISPLAY FOR APPROX 30 MIN & NEW DU DID NOT FAIL OR CAUSE ODORS DURING TIME SPAN. NO OTHER DEFECTS OR FAULTS.