What was found
ACARS NO COMMS AFTER REACHING CRUISE, ATC NO COMMS DURING CRUISE UNABLE CPDLC OVERHEAD SBB FAIL LIGHT ILLUMINATED, BUT ABLE TO CALL MOC ON SBB SAT PHONE. MADE HF POSITION REPORTS. RESET ACARS MU AND SBB SYSTEM. OPS TEST GOOD ON GROUND IAW AMM 23-26-00.