As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 HF RADIO SHOWS FAIL ON BOTH SIDES. GROUNDED - YES. ACCOMPLISHED #2 HF COMM SYSTEM BITE PROCEDURE REF B737-900 FIM 23-11 TASK 801, OPS CHECK FAIL, NO LIGHTS. REMOVED AND REPLACED #2 HF COMM TRANSCEIVER REF B737-900 AMM 23-11-21, GROUND TESTS NORMAL.