As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING THE LEFT FMC FAILED. THE FMC CONTINUALLY CYCLED ON/OFF THROUGHOUT TAXI IN TO THE GATE. GROUNDED - YES. CAPT'S FMC LOGGED 'PGM' FAULT ON GND. ACCOMP B737-800 FIM TASK 34-61 #807 & 836. GND VERIFICATION SUCCESSFUL, ALL CKS NML.