As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON LANDING BOTH FMC'S BLANKED CAPT VTK FLAGS. RECOVERED AFTER A FEW MINUTES. GROUNDED - YES. PERFORMED B737-800 FIM 34-36 TASK 836. OPENED , RESET 1 EA C/B ON P18-2 FMC L. L/H AND R/H FMC OPS NML. ETOPS GND VERIFICATION TEST SUCCESSFUL.