As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE SATCOM CONTACT WITH MEDLINK OR DISPATCH, ACARS CDU INDICATED GOOD CONNECTION & CALL. NO SIDE TONE. HF BUTTONS SET CORRECTLY GOOD LIGHT. MIC SELECTOR SET ALSO. ATTEMPTED ON BOTH 1 AND 2. ACFT GROUNDED. UNABLE TO CONFIRM FAULT, BOTH SATCOM NR 1 AND NR 2 SYSTEMS GROUND FUNCTIONAL TESTS NORMAL REF AMM TASK 23-15-00-730-801.