As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HF NR 1 INDICATES FAILURE ON FREQUENCY CONTROL PANEL. GROUNDED - YES. UPON A/C POWER UP, FOUND RTP'S NO LONGER SHOWS A HF NR 1 FAILURE. PERFORMED B737-800 FIM 23-11 TASK 801 HF BITE, RTP FIM 23-13 TASK 815 AND B737-800 AMM 23-12-41-800-802, ALL GOOD. GROUND VERIFICATION TEST GOOD.