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