As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED SINGLE FMC INOP WARNING LIGHT AND A VTK FLAG ON F/O SIDE. FMC SWITCH ON "BOTH ON L". GROUNDED - YES. F/O FMC INOP. REPLACED FMCS COMPUTER, REF B737-800 AMM 34-61-02. CROSSLOADED SOFTWARE AND ADJUSTED PERF FACTORS PER SAME. FMCS OPS NML.