As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HF 2 RADIO DISPLAYS FAIL ON BOTH ACTIVE & STANDBY FREQUENCY WITHOUT SIDE TONE TRANSMISSION. ACFT GROUNDED. PERFORMED A BITE CHECK IAW FIM 23-11-801, NO FAULTS. REMOVED AND REPLACED NR 2 HF TRANSCEIVER IAW AMM 23-11-21-000-801 AND 23-11-21-400-801. NO FURTHER FAULTS NOTED. GROUND VERIFICATION GOOD.