Lenovo IdeaCentre Q200 - Manual (Page 38)

Hardware Maintenance Manual
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9. Place the failing system board next to the new system board on a
clean, flat surface.
10. Remove all memory modules from the failing system board and install
them in the same connectors on the new system board. Refer to the
“Identifying parts on the system board”.
11. Disconnect the heat sink and fan assembly cable from the system
board. See the system board illustration for your machine type at
“Identifying parts on the system board”.
12. Remove the four screws securing the heat sink and fan assembly to
the system board.