Lenovo ThinkCentre A70 7099 Hardware Maintenance Manual page 98

3. At the rear of the computer, remove the screw that secures the PCI card latch.
Figure 9. Removing the screw that secures the PCI card latch
4. Do one of the following:
v If you are replacing a PCI card, open the PCI card latch and remove the old
PCI card that is currently installed, as shown in Figure 10 on page 93.
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Hardware Maintenance Manual