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7. Carefully take note of the location of all cable connections on the system board and disconnect all the
cables. See "Locating parts on the system board" on page 71.
8. Remove the heat sink and fan assembly from the failing system board. See "Replacing the heat sink and
fan assembly" on page 83.
9. Remove the eight screws that secure the system board.
Figure 22. Removing the eight screws that secure the system board
10. Carefully slide the system board so that it can be released from the mounting studs that secure the
system board in place.
11. Lift the system board out of the chassis.
12. Remove the microprocessor from the failing system board and install it on the new system board.
See "Replacing the microprocessor" on page 85.
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.
13. 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. Carefully slide the new system board into the chassis until
it is secured in place by the mounting studs. Then, install the eight screws to secure the system board.
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 78 and "Installing or replacing a PCI
card" on page 76.
15. 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 83.
16. Reconnect all remaining cables to the system board. See "Locating parts on the system board"
on page 71.
17. Reinstall the front bezel. See "Removing and reinstalling the front bezel" on page 74.
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ThinkCentre Hardware Maintenance Manual
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