As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPT'S NAV DISPLAY INOPERATIVE. SUSPECT COAX COUPLER AT FAULT. PERFORMED TROUBLE SHOOTING FOR FIM, CHECKED FOR LOOSE COAX CONNECTION ON LEFT COAX COUPLERS B31117 AND B31118. RESET COAX CONNECTIONS, CHECKED GOOD. POWER GOOD AT CAPT NAVIGATIONAL DISPLAY, AND ALL GROUNDS CHECKED NORMAL. ALL COAX CABLES AND CONNECTIONS APPEAR TO BE IN GOOD CONDITION. NO FAULTS NOTED.