As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THIRTY MINUTES INTO FLIGHT, MCDU 1 SHOWED LSK 1L BLANK (NO FMC) 100 MINS LATER MCDU 2 WENT BLANK AND FMC-2 DROPPED OFF NEVER GOT "MAP FAIL" ON MAP DISPLAY. WHEN ENG'S WERE SHUTDOWN IN PARKING GROUND POWER TOOK OVER, MCDU 2 CAME BACK UP.