As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SATCOM PROMPT ON CDU MENU WENT AWAY WHEN POWER WAS CHANGED FROM JETWAY TO APU. ACFT GROUNDED. RESET SATCOM C/B SWITCHED FROM APU POWER TO GROUND POWER BACK TO APU POWER. SATCOM OPERATES NORMAL ACFT OK FOR SERVICE IAW FIM TASK 23-15, TASK 801.