Lenovo ThinkStation 4157 Hardware Installation And Replacement Manual page 34

To replace an adapter card:
1. Remove the computer cover. See "Removing the computer cover" on page 11.
2. Unlatch and open the adapter card retainer.
3. Take note of the location of all cable connections on the adapter card. It will be necessary to reconnect
them properly when installing a new adapter card.
4. Disconnect all cables connected to the adapter card. See "Identifying parts on the system board"
on page 8.
5. Release the adapter card support retaining latch
pull the adapter card out of the slot.
Notes:
a. The adapter card fits tightly into the card slot. If necessary, alternate moving each side of the adapter
card a small amount until it is removed from the adapter card slot.
b. Some full length adapter cards are secured by the adapter card guide. Flex the adapter card guide
towards the front of the chassis and then grasp the failing adapter card to pull it out of the slot.
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ThinkStation Hardware Installation and Replacement Guide
1 if necessary. Grasp the failing adapter card and