As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI IN AMBER FMC LIGHT ILLUMINATED ON FORWARD INSTRUMENT PANEL. BOTH MCDU FMC PROMPTS DISAPPEARED FOR 1 MINUTE THEN REAPPEARED. GROUNDED, YES. ACCOMPLISHED OPERATIONAL TEST OF THE FLIGHT MANAGEMENT COMPUTER SYSTEM, REF AMM 34-61-00. OPS TEST GOOD. NO CURRENT FAULTS DISPLAYED. NO FURTHER DEFECTS NOTED.