As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH HF 1 RADIO SELECTED IN COMM PANEL "FAIL" ILLUM ON BOTH ACTIVE + STANDBY DISPLAY. GROUNDED - YES. PERFORMED B737-800 FIM 23-11 806, PERFORMED FIM BITE CHECK 23-11 801 BITE CHECK PASSED GROUND VERIFICATION SUCCESSFUL, NO HISTORY FOR 30 DAYS, A/C OKAY FOR SERVICE.