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3.5 Replacing the Main Board 
 
1. Refer to section 3.1 and 3.4 to remove electronics cover and multi-interface  board. 
2. Remove 4 screws to take off the interface plate. 
 
2. Disconnect all connectors from the main board. Remove 2 copper pillars and 2 screws. 
 
4. Replace the main board. 
5. Reassemble the parts in the reverse procedures.