As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MXP - CREW REPORTED ON TAKEOFF ROLL, FIRST OFFICER OBSERVED LOSS OF BOTH FLIGHT DIRECTORS. AFTER TAKEOFF COMMAND AIRSPEED BUGS ALSO NOTED MISSING FROM BOTH SIDES. AUTOPILOT MODE CONTROL PANEL LOCKED UP. NO WARNING INDICATIONS OR EICAS MESSAGES. EMERGENCY DECLARED FLIGHT RETURNED MXP. AIRCRAFT REMOVED FROM SERVICE. REPLACED AUTOPILOT MODE CONTROL PANEL. SYSTEM GROUND CHECK NORMAL OPERATION.