(should take 30 minutes or less):

*pictures to follow

1) Turn machine off
2) Remove back panel
3) Take pictures of wiring connections (they should be straightforward)
4) Unplug connectors
5) Unscrew four m3 nuts that hold board to center panel
6) Remove board
7) Replace with new board
8) Assembly is reverse of disassembly
9) Start machine and load new firmware from touchscreen