As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH HF2 SELECTED IN EITHER RADIO SELECT PANEL, FAIL IS DISPLAYED IN BOTH THE ENTIRE AND STANDBY WINDOWS. ACFT GROUNDED. TESTED NR 2 HF TRANSCEIVER, IT IS COMPLETELY DEAD. REPLACED HF NR 2 TRANSCEIVER, REF MM TASK 23-11-21-400-801. OPS CK OK IAW SAME. ALSO, VERIFIED THAT THE FAIL FLAGS PULLED ON THE VHF AUDIO PANEL AND THE STATION NRS ARE RESTORED. ETOPS GROUND VERIFICATION COMPLETE.