As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLIGHT FMC P/RST LIGHT ILLUMINATED ALONG WITH VTK MESSAGE ON FO MAP DISPLAY. AS WE BEGAN TO LOOK THROUGH THE QRH THE LIGHT WENT OUT AND THE MESSAGE CLEARED. GROUNDED, YES. L FMC LOGGED "FMC - PRES POS LAT RATE" ON FLIGHT LEG 1. R FMC LOGGED NO FAULTS. FMCS OPS TEST NORMAL, REF AMM 34-61-00. A/C OKAY FOR CONTINUED FLIGHT. CYCLED 2 C/B'S, REF FIM 34-61 TASK 836.