Lenovo ThinkCentre 3231 Hardware Maintenance Manual page 111

b. If the adapter card is held in place by a retaining latch, press the adapter
card retaining latch 1 downwards to disengage the latch. Grasp the
adapter card and then gently pull the adapter card out of the slot.
3. Remove the new adapter from its static-protective package.
4. Install the new adapter card into the same adapter card slot.
Figure 18. Install a new adapter card
Chapter 8. Replacing FRUs - Tower computers
105