What was found
FMC P/RST ON AFTER LANDING ON ROLL OUT. ON SHUT DOWN WITH IRS SWITCHES IN OFF POSITION, BOTH RIGHT AND LEFT GPS SHOWING LAT/LONG. GROUNDED - YES. REMOVED AND REPLACED RH FMC COMPUTER PER B737-800 AMM 34-61-02-000-801/AMM 34-61-02-400-801. PERF PERFORMANCE FACTORS ADJUSTMENT PER B737-800 AMM 34-61-00-800-801. SOFTWARE LOAD PER AMM 34-61-00/201. ACCOMPLISHED FMCS OPS TEST PER AMM 34-61-00-710-801 OPS TEST PASSED. ALSO ACCOMPLISHED MMR BITE TEST PER B737-800 FIM 34-51 TASK 801 BITE TEST PASSED. ACCOMPLISHED ADIRU BITE PER FIM 34-21 TASK 801 NOTHING IN INFLIGHT FAULTS AND NOTHING IN CURRENT STATUS.