As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCDU NR 1 AND NR 2 LOCKED UP IN FLIGHT. NO FLIGHT PLAN INFO, NO AUTOPILOT RESET. RESET ITSELF AFTER 30 MINUTES. PERFORMED RTS OF BOTH VIA'S AND AUTOPILOT SYSTEM PERFORMED AUTOLAND RTS. REINSTALLED VIA SOFTWARE AND PERFORMED RTS. SYSTEMS OPS CHECK GOOD. CLEANED COOLING HOLES ON MCDU'S.