How to check the condition of the control panel connectors
Step 1 - Access the back of the control panel
Unscrew the 4 screws on the back of your CP and remove the back casing.
Step 2 - Check the connectors and wires are connected properly
There should not be a gap between the 2 plastic connectors.

Step 3 - Check the condition of the four small metal pins that join the connector to the PCB
These should not be rusty or dirty.