As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUAL FMC FAIL DURING PREFLIGHT. FMC PROMPTS MISSING FROM MENU AND RESUMED NORMAL OPS AFTER 10 SECONDS. GROUNDED - YES. ONLY LT FMC FAILED DURING PRE-FLIGHT. BITE CHECKED BOTH LT AND RT FMC REF FIM 34-61 TASK 801. LT & RT FAULTED ON GND - LT FMC. PERF FIM 34-61 TASK 807. W/ NO DEFECTS. ETOPS GND VERIFICATION TEST SUCCESSFUL.