Lenovo ThinkSystem SR950 Setup Manual page 315

CAUTION:
The power-control button on the device and the power switch on the power supply do not turn off the
electrical current supplied to the device. The device also might have more than one power cord. To
remove all electrical current from the device, ensure that all power cords are disconnected from the
power source.
"
CAUTION:
Make sure that all server power cords are disconnected from their power sources before performing
this procedure.
If you are installing the lower system board in a compute tray, first remove the upper system board or filler
from the compute tray to access connectors on the lower system board. See "Remove a system board" on
page 309 or "Remove a system board filler" on page 312.
Complete the following steps to install the compute system board:
Watch the procedure. A video of the replacement process is available:
•
YouTube
•
Youku
Figure 80. System board installation
Step 1. Align the system board with the rails in the compute tray; then, insert the system board, making
sure that the rails on the board fit into the slots in the compute tray.
Step 2. Slide the system board into the compute tray until the release clips snap into the locked position.
Step 3. Connect all cables on the system board that go to connectors in the compute tray. See "Internal
cable routing" on page 35.
After you install the system board:
• If you installed the lower system board in a compute tray, slide the upper system board or filler back into
the compute tray until the release clips snap into the locked position.
" on page 56 " " on page 254
Appendix B. Component reference
311