As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CDG INFLIGHT T0120/6 MAR TCAS DISPLAY STARTED SMOKING ABOUT THREE HOURS AFTER TAKEOFF. SMOKE LASTED AROUND 10 SECONDS FOLLOWED BY BURNING ELECTRICAL SMELL. TCAS DISPLAY WENT BLANK. TURNED TRANSPONDER TCAS TO STANDBY AND PULLED TCAS CIRCUIT BREAKERS. NO FURTHER SMOKE OR ELECTRIC BURNING SMELL NOTED. REPLACED TCAS DISPLAY. SYSTEM GROUND CHECKED NORMAL OPERATION.