As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HF 2 RADIO DOES NOT TEST. RADIO INOP. GROUNDED - YES. PERFORMED B737-800 FIM 23-11 TASK 801, TEST FUNCTION ON TRANSCEIVER INOP. WHEN HF2 SELECTED ON COMM PANEL, NO TUNE TONE AFTER KEYING MICROPHONE. ALSO NO BACKGROUND RADIO NOISE PRESENT ON HF FREQUENCIES. REMOVED & REPLACED #2 HF TRANSCEIVER IAW B737-800 AMM 23-11-21. HF SYSTEM TEST GOOD.