Lenovo 3823, 3821, 3822, 3719 manual Removing the system board

Removing the system board

Handle

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