As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 HF/SAT SWITCH WILL NOT SELECT SAT. GROUNDED - YES. REMOVED AND REPLACED HF/SAT PANEL REF B737-800 AMM TASK 23-15-00-400-804, SATCOM COMMUNICATION SYSTEM TEST, AMM TASK 23-15-00-730-801. SATCOM VOICE TEST OF HF1 AND HF2 SYSTEM TEST REF AMM 23-11-00 IS GOOD.