As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER DEPARTURE HF-1 INOPERABLE. NO INCOMING AUDIO, NO TRANSMIIT OR SIDE TONE. GROUNDED-YES. VERIFIED DEFECT, NR 1 HF WILL NOT TUNE, NO SIDE TONE. REMOVED AND REPLACED NR 1 HF COUPLER, REF B737-800 AMM 23-11-61. GROUND VERIFICATION TEST PASSED.