Lenovo ThinkAgile VX7820 User Manual page 120

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.
Before you remove the system board:
1. Remove the front cover. See "Remove the front cover" on page 131.
2. Remove compute tray where the system board is installed. See "Remove a compute tray" on page 115.
3. If you are removing 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 the steps below or
"Remove a system board filler" on page 113.
Complete the following steps to remove the compute system board:
Watch the procedure. A video of the replacement process is available:
• YouTube
•
Youku
Figure 55. System board removal
Step 1. Disconnect all cables on the system board that go to connectors in the compute tray. See "Internal
cable routing" on page 40.
Step 2. Press the release clips and slide the system board out of the compute tray.
After you remove the system board:
User Guide for ThinkAgile VX7820 Appliance, ThinkAgile VX 4-Socket 4U Certified Node
110
" on page 89 " " on page 65