As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENROUTE AT FL 330. FMC MESSAGE & VTK DISPLAYED ON CAPTAINS MAP. CAPTAINS MCDU MENU PAGE MISSING FMC. AUTOPILOT A WAS SELECTED AT THE TIME. LNAV/VNAV DISENGAGED. APPROXIMATELY 2 MINUTES LATER LEFT FMC RESTORED. LNAV/VNAV RE-ENGAGED. OPERATIONS NORMAL. GROUNDED - YES. RESET NR 1 FMC, IAW FIM 34-61-836, OPS CHECK OK.