Lenovo ThinkCentre M55e - Manual (Page 7)

Overview
This guide is intended to be used by customers who are replacing Customer
Replaceable Units (CRUs) as well as trained service personnel who are replacing
Field Replacement Units (FRUs). In this guide, CRUs will often be referred to as
parts.
This guide does not include procedures for all parts. It is expected that cables,
switches, and certain mechanical parts can be replaced by trained service personnel
without the need for step-by-step procedures.
Note: Use only the parts provided by Lenovo ™ .
This guide contains instructions for replacing the following parts:
v Power supply
v System board
v Heat sink
v Hard disk drive
v Optical drive
v Diskette drive
v Memory modules
v PCI adapter
v Fan assembly
v Internal speaker
v Keyboard
v Mouse
Safety information
Do not open your computer or attempt any repair before reading the “Important
safety information” in the Safety and Warranty Guide that was included with your
computer. If you no longer have this copy of the Safety and Warranty Guide, you
can obtain one online from the Support Web site at
http://www.lenovo.com/support.
Additional information resources
If you have Internet access, the most up-to-date information for your computer is
available from the World Wide Web.
You can find the following information:
v CRU removal and installation information
v CRU removal and installation videos
v Publications
v Troubleshooting information
v Parts information
v Downloads and drivers
v Links to other useful sources of information
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