As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN DOOR: AMBER CABIN DOOR OPEN CAS MESSAGE REMAINED DISPLAYED AFTER SHUTTING THE MAIN CABIN DOOR. AFTER COMPLETEING THE QRH, THE CAS MESSAGE DID NOT CLEAR. // SIGNOFF// GAINED ACCESS TO PCB NC105 BY REMOVING LH SIDE WALL ACCESS PANEL. REMOVED AND REPLACED PCB ASSY·CED MONITOR NC105. PERFORMED MULTIPLE OPERATIONAL CHECKS, OPERATIONAL CHECKS GOOD. ALL WORK PERFORMED IAW CESSNA 680A MAINENANCE MANUAL 52-10-00.