Replacing a PCI Express card
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter
1 “Read this first: Important safety information” on page 1.
To replace a PCI Express card, do the following:
1. Remove any media from the drives and turn off all connected devices and the computer. Then,
disconnect all power cords from electrical outlets and disconnect all cables that are connected to the
computer.
2. Remove the computer cover. See “Removing the computer cover” on page 88.
3. Locate the PCI Express card you want to replace. The PCI Express cards are installed in the PCI
Express card slots on the system board. See “Parts on the system board” on page 35.
4. Pivot the two plastic retaining clips that secure the heat sink fan duct outward. Then, remove the heat
sink fan duct from the failing heat sink and fan assembly.
Figure 92. Removing the heat sink fan duct
5. Pivot the card latch at the rear of the computer to the open position. Then, grasp the card that is
currently installed and gently pull it out of the slot.
Figure 93. Removing the PCI Express card
Notes:
• The card fits tightly into the card slot. If necessary, alternate moving each side of the card a small
amount until it is removed from the card slot.
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ThinkCentre M800 and M900 Hardware Maintenance Manual
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