Lenovo ThinkEdge SE455 V3 User Manual page 141

remove all electrical current from the device, ensure that all power cords are disconnected from the
power source.
About this task
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.
• Make sure to remove or install memory module 20 seconds after disconnecting power cords from the
system. It allows the system to be completely discharged of electricity and safe for handling memory
module.
• If the server is installed in a rack, remove the server from the rack. See
on page 49.
• Memory modules are sensitive to static discharge and require special handling. Refer to the standard
guidelines for "Handling static-sensitive devices" on page
– Always wear an electrostatic-discharge strap when removing or installing memory modules.
Electrostatic-discharge gloves can also be used.
– Never hold two or more memory modules together so that they do not touch each other. Do not stack
memory modules directly on top of each other during storage.
– Never touch the gold memory module connector contacts or allow these contacts to touch the outside
of the memory module connector housing.
– Handle memory modules with care: never bend, twist, or drop a memory module.
– Do not use any metal tools (such as jigs or clamps) to handle the memory modules, because the rigid
metals may damage the memory modules.
– Do not insert memory modules while holding packages or passive components, which can cause
package cracks or detachment of passive components by the high insertion force.
Procedure
Attention: Make sure to remove or install memory module 20 seconds after disconnecting power cords from
the system. It allows the system to be completely discharged of electricity and safe for handling memory
module.
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. Locate the memory module slots and determine which memory module you want to remove
from the server.
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 server from the rack"
"Remove the server from the rack"
42.
141.
"Remove the processor air baffle" on page
.
Chapter 5 Hardware replacement procedures
to ensure that you
195.
223.
67.
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