As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCDU #1 LOCKED UP IN FLIGHT. GROUNDED - YES. PERFORMED A/C POWER RESET REF AMM 24-22-00. MCDU #1 OPS CHECK GOOD AT THIS TIME. NO FAULTS FOUND OR MAINTENANCE MESSAGES. NO HISTORY PAST 90 DAYS. MCDU OPS CK GOOD REF AMM 34-61-01. A/C OK FOR SVC.