Lenovo M4350 Desktop - Manual (Page 75)

Chapter 8. Replacing FRUs
Important: Before you replace any FRU, be sure to read and understand Chapter 1 “Safety information” on
page 1. These precautions and guidelines will help you work safely.
FRU replacements are to be done only by trained service technicians.
This chapter provides instructions about removing or replacing major FRUs. Not all FRUs are documented.
Handling static-sensitive devices
Do not open the static-protective package containing the new part until the defective part has been removed
from the computer and you are ready to install the new part. Static electricity, although harmless to you, can
seriously damage computer components and parts.
When you handle computer parts and components, take these precautions to avoid static-electricity damage:
• Limit your movement. Movement can cause static electricity to build up around you.
• Always carefully handle the parts and other computer components. Handle PCI cards, memory modules,
system boards, and microprocessors by the edges. Never touch exposed circuitry.
• Prevent others from touching the parts and other computer components.
• Before you replace a new part, touch the static-protective package containing the new part to a metal
expansion-slot cover or other unpainted metal surface on the computer for at least two seconds. This
reduces static electricity from the package and your body.
• Remove the new part from the static-protective package and directly install it in the computer without
placing it on any other surface. If it is hard for you to do this in your specific situation, place the
static-protective package of the new part on a smooth, level surface, and then place the new part on
the static-protective package.
• Do not place the part on the computer cover or other metal surface.
Installing or replacing hardware
This section provides instructions on how to install or replace hardware for your computer. You can expand
the capabilities of your computer and maintain your computer by installing or replacing hardware.
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Safety
information” on page 1.
Notes:
1. Use only computer parts provided by Lenovo.
2. When installing or replacing an option, use the appropriate instructions in this section along with the
instructions that come with the option.
Removing the computer cover
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Safety
information” on page 1.
This section provides instructions on how to remove the computer cover.
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