Lenovo ThinkCentre M70e Hardware Maintenance Manual page 124

Figure 57. Removing the eight screws that secure the system board
10. Lift the system board out of the chassis.
11. Remove the microprocessor from the failing system board and install it on the new system board. See
"Replacing the microprocessor" on page 112.
Note: If your new system board comes with a microprocessor socket cover, remove the socket cover
before you install the microprocessor on the new system board.
12. Install the new system board into the chassis by aligning the eight mounting studs in the chassis with the
corresponding holes in the new system board. Then, install the eight screws to secure the system board.
13. Install the heat sink and fan assembly and connect the heat sink and fan assembly cable to the new
system board. See "Replacing the heat sink and fan assembly" on page 110.
14. Install all memory modules and PCI cards removed from the failing system board on the new system
board. See "Installing or replacing a memory module" on page 107 and "Installing or replacing a PCI
card" on page 105.
15. Reconnect all remaining cables to the system board. See "Locating parts on the system board"
on page 99.
16. Lower the drive bay assembly. See "Accessing the system board components and drives" on page 103.
17. Reinstall the front bezel. See "Removing and reinstalling the front bezel" on page 102.
18. Reinstall the computer cover.
19. Go to "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.
To install the microprocessor socket cover:
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ThinkCentre Hardware Maintenance Manual