As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HF #2 DISPLAYS FAIL IN ACTIVE & STANDBY. GROUNDED - YES. (RESOLVED ON W/O: 1889997 TASKCARD: N/R-00001 ) UNABLE TO DUPLICATE DEFECT. HF OPERATIONAL TEST PER B737-900 MM 23-11-00-710-801 SHOWED NO TRANSCEIVER FAULTS. ACCOMPLISHED HF SYSTEM TEST PER MM 23-11-00-730-801 - ALL TESTS PASS.REMOVED C/N 29043493 AND NOTIFIED SEAMC MARK. CLEARS MEL 23-11A.