As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE AT FL370, SINGLE FMC OPERATION ILLUMINATED ON BOTH FMC SCRATCHPADS, F/O SIDE VTK & MAP ILLUMINATED ON NAVIGATION DISPLAY. FOLLOWED QRH PROCEDURE FOR FMC FAIL. DUAL FMC OPERATION DID NOT RESTORE. ACFT GROUNDED. PERFORMED FIM TASK 34-61-807 AND FMC RESTORED TO NORMAL OPERATION, OK FOR SERVICE. NO 30 DAY HISTORY.