As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 HF RADIO OFF TUNES PILOT WITHOUT INPUT. OTHERWISE FUNCTIONS NORMAL. GROUNDED - YES. C/W HF COMMUNICATION SYSTEM OPERATIONAL TEST REF B737-800 AMM TASK 23-11-00-710-801, BITE CHECK GOD THE HF#1&2 GOOD. DUE TO NATURE OF DISCREPANCY SUSPECT #1 RMP MAYBE BAD. REMOVED & REPLACED #1 RADIO TUNING PANEL IAW AMM 23-12-41/401, OPS CHECK OF THE PANEL IS GOOD.