Lenovo ThinkCentre 3231 Hardware Maintenance Manual page 142

Figure 47. Removing the old adapter card
3. Remove the new adapter card from its static-protective package.
4. Install the new adapter card into the adapter card slot and ensure the adapter
card is fully seated into the adapter card slot.
Figure 48. Installing an adapter card
5. Close the adapter card retainer.
6. Go to "Completing the FRU replacement" on page 158.
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Hardware Maintenance Manual