Lenovo THINKSERVER 3821 - Manual (Page 216)

4. Unlock and remove the side cover (see “Removing the left-side cover” on page
157).
5. Remove any adapters that are installed in the expansion slots (see “Removing
an adapter” on page 184).
6. Remove the system board and place it on a static-protective surface (see
“Removing the system board” on page 231).
Note: Do not remove the DIMMs, heat sinks, microprocessors, VRM, or battery
from the system board.
7. Remove the two screws that secure the extender card to the system-board tray.
8. Pull the extender card out of the system-board connector.
9. If you are instructed to return the extender card, follow all packaging
instructions, and use any packaging materials for shipping that are supplied to
you.
208 ThinkServer TD200x Types 3719, 3821, 3822, and 3823: Hardware Maintenance Manual