Lenovo ThinkStation P300 Hardware Maintenance Manual page 138

10. Install the new system board into the chassis by aligning the eight screw holes in the new system board
with the corresponding mounting studs on the chassis. Then, install the eight screws to secure the
system board by following the sequence shown in the following illustration.
Figure 89. Installing the eight screws to secure the system board
11. 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 105.
12. Install all memory modules and PCI cards removed from the failing system board onto the new system
board. See "Installing or replacing a memory module" on page 88 and "Installing or replacing a PCI
card" on page 85.
13. Refer to your record to connect cables to the new system board. You also can refer to "Locating
parts on the system board" on page 72 to help you locate the connectors on the system board and
connect cables.
14. To complete the installation or replacement, go to "Completing the parts replacement" on page 142.
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. After you have removed the microprocessor from the failing system board, close the microprocessor
retainer and then put the lever to the locked position to secure the retainer in place.
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ThinkStation P300 Hardware Maintenance Manual