As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SINGLE FMC OPERATION DISPLAYS ON CDU WITH ASSOCIATED MAP FLAG ON F/O NO DISPLAY. ACFT GROUNDED. RESET C/B FMCS COMTR NR 1, NR 2 BOTH SYS RETURN TO NORMAL, MAP FLAG DISAPPEARED. REF AMM 34-61-00-710-810 FMCS OPERATIONAL TEST. TSR ISSUED. REPLACED NR 1 FMC COMPUTER IAW AMM 34-61-02, GROUND FUNCTIONAL CHECK GOOD IAW AMM 34-61-00.