3. Remove all power:
a. Disconnect each power cord from the power source.
b. Disconnect each power cord from the server.
4. Disconnect all peripheral cables from the server.
5. Remove the server from the rack.
6. Place the server on a flat, level work surface.
7. Remove the access panel.
8. Remove the middle cover.
9. Remove the air baffle .
10. Remove all fans.
11. Remove the fan wall.
12. Remove the riser cage.
13. Remove the left OCP Slot 21 rail.
Retain all screws. These screws will be used to secure the new left OCP Slot 21 rail spare.