Lenovo THINKCENTRE 2491 Hardware Maintenance Manual page 82

2. Open the computer cover. See "Opening the computer cover" on page 72.
3. Locate the system board and disconnect all cables connected to the system board. See "Locating
parts on the system board" on page 71.
4. Press inward on the two side tabs and then pivot the system board to release it from the chassis.
Figure 9. Releasing the system board
5. Place the system board on a clean and flat surface.
6. Locate the PCI card slot. See "Locating parts on the system board" on page 71.
7. Rotate the PCI card retainer to the open position.
8. Depending on whether you are installing or replacing a PCI card, do one of the following:
• If you are installing a PCI card, remove the metal slot cover.
• If you are replacing an old PCI card, grasp the old card that is currently installed and gently pull it
out of the slot.
Figure 10. Removing the PCI card
9. Remove the new PCI card from its static-protective package.
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ThinkCentre Hardware Maintenance Manual