Lenovo THINKSERVER 3821 - Manual (Page 239)

Removing the system board
1 Handle
2 Release lever
To remove the system board, complete the following steps:
1. Read the safety information that begins on page 5.
2. Turn off the server and all attached devices; then, disconnect all power cords
and external cables.
3. Carefully turn the server on its side so that it is lying flat, with the cover facing
up.
Attention: Do not allow the server to fall over.
4. Unlock and remove the side cover (see “Removing the left-side cover” on page
157).
5. Remove the power supply or power supplies from the power-supply cage (see
“Removing a hot-swap power supply” on page 174).
6. Rotate the power-supply cage to its open position (see “Opening the
power-supply cage” on page 158).
7. Remove the air baffle (see “Removing the air baffle” on page 169).
8. Remove the fan-cage assembly (see “Removing the fan-cage assembly” on
page 171).
9. Note where the cables are connected to the system board; then, disconnect
them.
Chapter 7. Installing optional devices and replacing customer replaceable units 231