As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HF RADIO #1 IS DISPLAYING FAIL IN BOTH ACTIVE AND STANDBY. GROUNDED - YES. VERIFIED #1 HF SHOWS FAIL FAIL NO HISTORY PERFORMED BITE ON HF #1 TRANSCEIVER BITE IS NORMAL AND #1 HF OPS NORMAL. GRD VERIFICATION SUCCESSFUL. REF B737-800 FIM 23-11 TASK 801.