Lenovo ThinkCentre M71e Hardware Maintenance Manual page 143

8. Remove the six screws that secure the system board.
Figure 72. Removing the six screws that secure the system board
9. Lift the system board out of the chassis.
10. Remove the microprocessor from the failing system board and install it on the new system board. See
"Replacing the microprocessor" on page 133.
11. Install the new system board into the chassis by aligning the six mounting studs in the chassis with the
corresponding holes in the new system board. Then, install the six screws to secure the system board.
12. 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 127.
13. 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 117 and "Installing or replacing a PCI
card" on page 118.
14. Reconnect all remaining cables to the system board. See "Locating parts on the system board" on
page 110.
15. Lower the optical drive bay assembly. See "Accessing the system board components and drives" on
page 115.
16. To complete the replacement, go to "Completing the parts replacement" on page 104.
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, do the following:
1. Release the lever securing the microprocessor retainer and open the retainer to access the
microprocessor.
.
Chapter 9 Replacing FRUs (Machine Types: 3132, 3134, 3140, 3143, 3147, 3154, 3157, 3167,
3171, 3176, 5033, 5039, and 7339.)
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