As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INFO ONLY "SAT" OPTION NOT DISPLAYED ON CAPT'S MCDU, IS DISPLAYED ON F/O MCDO. GROUNDED - YES. COMPLETED SAT LOCK-UP B737 QRH WITH NO RESULT TESTED SATCOM USING F/O MCDO AND FUNCTIONED PROPERLY BUT STILL NO "SAT" ON CAPT'S MENU UNTIL APPROX 1.5 HRS THEN "SAT" AVAILABLE ON BOTH CDU'S.