What was found
MAIN CABIN DOOR WILL NOT CLOSE. USING OVERRIDE & LIFT BUTTONS SIMULTANEOUSLY, WILL LIFT INTO POSITION BUT DID NOT LOCK. USING LIFT BUTTON ALONE, NOTHING. DOOR PINS ALL RETRACT & EXTEND, WHEN DOOR IS LIFTED INTO CLOSED, HANDLE CAN BE MOVED TO CLOSED - LOCK POSITION TO HOLD DOOR, BUT DOESN`T LOCK & HANDLE CAN BE LIFTED OUT OF POSITION WITHOUT EXERCISING RED UNLOCK BUTTON. YELLOW UNLOCKED LIGHT DOESN`T ILLUMINATE. YELLOW DOOR OPEN CAS MESSAGE ALTERNATES ON & OFF APPROX EVERY 30 SECS WHEN DOOR OPEN. ATTEMPTED A POWER RESET WITH BATTERIES DISCONNECTED TO DIAGNOSE, BUT IT DIDN`T WORK. ALSO RAN QRH, DIDN`T WORK. REMOVED CED MONITOR PCB WITH NEW PCB IAW AMM24-60-40. CYCLED DOOR SEVERAL TIMES, NO DEFECTS.