Lenovo ThinkEdge SE455 V3 User Manual page 89

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.
Attention:
• Read "Installation Guidelines" on page 39
work safely.
• If applicable, remove the security bezel. See
• 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
d. If applicable, remove the air flow sensor board. See
page 75.
e. Remove the intrusion switch. See
f. If applicable, disconnect the cables from PCIe 8, 9, 10, 11 connector on the system board, and
remove the cables that are routed through the cable wall. See
cable routing" on page 230
Step 2. Disconnect the heat sink detect switch cable from the system board.
Step 3. Loosen the two screws that secure the cable wall; then, lift the cable wall to remove it.
and "Safety inspection checklist" on page 40
"Remove the security bezel" on page
48.
"Remove the top cover" on page
"Remove the PCIe riser assembly" on page
"Remove the intrusion switch with cable" on page
to locate the connectors.
"Remove the server from the rack"
141.
"Remove the processor air baffle" on page
"Remove the air flow sensor board" on
.
Chapter 5
to ensure that you
195.
223.
67.
118.
"System-board connectors for
Hardware replacement procedures 81