As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT FMC FAILURE ON LANDING, FMC RESTORED OPS WITHOUT USE OF THE QRH. GROUNDED - YES. PERFORMED #1 AND #2 FMC BITE AND FOUND #2 FMC PMG FAULT ON GROUND CAUSING RESET. NO CURRENT FAULTS REF B737-900 FIM 34-61 TASK 837. OPS TEST GOOD. ETOPS SIGN SYSTEM GND VERIFICATION SUCCESFUL.