Lenovo ThinkCentre M700 Hardware Maintenance Manual page 136

3. Remove all PCI Express cards. See "Replacing a PCI Express card" on page 116.
4. Remove all memory modules. See "Replacing a memory module" on page 120.
5. Remove the heat sink and fan assembly. See "Replacing the heat sink and fan assembly" on page 123.
6. Record the cable routing and cable connections, and then disconnect all cables from the system board.
See "Parts on the system board" on page 37.
7. Remove the eight screws that secure the system board, and then carefully lift the system board out of
the chassis.
Note: Carefully handle the system board by its edges.
Figure 71. Removing the system board
8. Remove the microprocessor from the failing system board, and then install it onto the new system
board. See "Replacing the microprocessor" on page 125.
9. Align the eight holes in the new system board with the corresponding screw holes in the chassis. Then,
install the eight screws to secure the system board to the chassis.
10. Route all the cables that you disconnected from the system board, and then reconnect the cables to
the system board. See "Parts on the system board" on page 37.
11. Reinstall the heat sink and fan assembly. See "Replacing the heat sink and fan assembly" on page 123.
12. Reinstall all memory modules. See "Replacing a memory module" on page 120.
13. Reinstall all PCI Express cards. See "Replacing a PCI Express card" on page 116.
14. Reinstall the computer cover and reconnect cables to your computer. See "Completing the parts
replacement" on page 129.
The failing system board must be returned with a microprocessor socket cover to protect the pins during
shipping and handling.
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ThinkCentre M700 Hardware Maintenance Manual