As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FMC 1 MENU PAGE, NO SAT DISPLAYED. PERFORMED SAT LOCKUP QRH AND PROBLEM REMAINS. FMC 2 MENU DISPLAYS SAT BOTH BEFORE AND AFTER SAT LOCKUP QRH WAS PERFORMED. GROUNDED - YES. C/B RESET FOR # 1 FMCS COMPT AND # 1 CDU P18-1 PNL REF B737-9 AMM 20-60-05 SAT PROMPT ILLUMINATED ON CAPTS CDU.