Lenovo ThinkSystem SR950 Setup Manual page 216

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.
Notes:
• If you are installing an optional processor or memory module, perform those tasks first. See "Install a
processor-heat-sink module" on page 213 or "Install a memory module" on page 216.
• Make sure that memory module fillers are installed in all vacant memory module connectors.
• Make sure that all memory air baffles are installed. See "Memory air baffle replacement" on page 350.
Before you install the system board:
1. If the front cover is installed, remove it. See "Remove the front cover" on page 322.
2. Remove compute tray where the system board is being installed. See "Remove a compute tray" on page
305.
Complete the following steps to install the compute system board:
Watch the procedure. A video of the replacement process is available:
•
YouTube
• Youku
Figure 28. 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.
ThinkSystem SR950 Setup Guide
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