Schematic for communication cable between Main Board (CON 5) and Display Board (CON 101).

Is the error message Er CO displayed?

Check the connector at the Display Board. Is it loose?

Check CON 101 on the Display Board. Is there voltage between pins 3 and 5? It should be 5VDC. If no voltage, replace the display board. (Pin 5 is WHITE and RED; pin 3 is WHITE and BLACK.)

Check CON 101 on the Display Board. Is there voltage between pins 4 and 5? It should be 5VDC. If no voltage, replace the Display Board. (Pin 5 is WHITE and RED; pin 4 is BURNT ORANGE.)

Check the connector at the door hinge. Be sure it is not loose.

Check connector 5 on the Main Board.

Check CON 5 on the Main Board. Is there voltage between pins 3 and 4? It should be 5VDC. If no voltage, replace the Main Board. (Pin 3 is WHITE and RED; pin 4 is BURNT ORANGE.)

Check CON 5 on the Main Board. Is there voltage between pins 3 and 5? It should be 5VDC. If no voltage, replace the Main Board. (Pin 3 is WHITE and RED; pin 5 is WHITE and BLACK.)

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