As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI IN AFTER LANDING, VTK IN CAPTAIN'S NAV DISPLAY FMC DISAPPEARED FROM MCDU THEN WOULD CYCLE ON AND OFF WITH VTK. ACFT GROUNDED. CYCLED POWER ON ACFT. PERFORMED FMC SYSTEM OPS TEST IAW AMM 34-61-00-710-801. GROUND VERIFICATION GOOD, OK FOR SERVICE.