As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT MAP FLAG ON F/O NAV DATA DISPLAYS. CYCLED FMC C/B'S P6 1 D15 AND D16 TO REBOOT F/O'S FMC AND CDU. PERFORMED F/O'S FMC BITE PROCEDURE 34 61 00 810 801, NO FAULTS INDICATED OPS NORMAL. PERFORMED F/O'S FMC AND CAPTS FMC OPERATIONAL TEST PER MM 34 61 00 710 801. GROUND TESTS NORMAL. F/O'S MAP FLAG NOT IN VIEW. SEAMC ADVISED.