Lenovo ThinkCentre 7515 Maintenance Manual page 99

To install or replace an adapter card:
1. Remove the computer cover. See "Removing the computer cover" on page 86.
2. At the rear of the computer, press the release button 1 to open the adapter
card latch 2 and remove the slot cover.
Figure 10. Opening the adapter card latch
3. Remove the adapter card from its static-protective package.
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Chapter 8. Replacing FRUs - Tamdhu computers