Lenovo ThinkEdge SE455 V3 User Manual page 93

• Power off the server and peripheral devices and disconnect the power cords and all external cables. See
"Power off the server" on page
• If the server is installed in a rack, remove the server from the rack. See
on page 49.
Procedure
Step 1. Make preparation for this task.
a. Remove the top cover. See
b. Remove all the PCIe assemblies. If the configuration comes with PCIe riser 2 and internal
drives, remove all the internal drives, and lift the internal drive backplane before removing PCIe
riser 2. See
c. Remove the processor air baffle. See
Step 2. Locate the CMOS battery to be removed:
Figure 56. CMOS battery locations on the system board
3V security battery (CR2032)
1
Note: If 3V security battery (CR2032) is replaced, the system enters System Lockdown Mode and
needs to be activated or unlocked. See
48.
"Remove the top cover" on page
"Remove the PCIe riser assembly" on page
"Activate or unlock the system" on page
"Remove the server from the rack"
141.
"Remove the processor air baffle" on page
3V system battery (CR2032)
2
.
Chapter 5
223.
67.
255.
Hardware replacement procedures 85