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The following table lists the major FRUs shown in “Locating major FRUs and CRUs” on page 78 and
identies which FRUs also are self-service CRUs or optional-service CRUs.
Notes:
• Self-service CRUs: These CRUs unplug or are secured by no more than two screws. Examples of
these types of CRUs include the keyboard, the mouse, any USB device, and the power cord. Other
self-service CRUs depending on product design might include memory modules, adapter cards, hard
disk drives, and optical drives.
• Optional-service CRUs: These CRUs are isolated parts within the computer and are concealed by an
access panel that is typically secured by more than two screws. Once the access panel is removed, the
specic CRU is visible.
Number FRU description
Self-service CRU Optional-service CRU
1
Power supply assembly No Yes
2
Memory modules Yes No
3
Optical drive (available in some models)
Yes No
4
Front audio and USB assembly
Yes No
5
Card reader (available in some models)
No Yes
6
Front bezel Yes No
7
Front Wi-Fi antenna No Yes
8
System fan
No Yes
9
Hard disk drive No Yes
10
Battery Yes No
11
Wi-Fi card module No Yes
12
Wi-Fi adapter card No Yes
13
Rear Wi-Fi antenna Yes No
14
System board
No No
15
Microprocessor No Yes
16
Peripheral Component Interconnect (PCI) card
Yes No
17
Heat sink and fan assembly
Yes No
18
Keyboard Yes No
19
Mouse Yes No
Looking up FRU information
For detailed FRU information, such as the FRU part numbers and supported computer models, go to:
http:/www.lenovo.com/serviceparts-lookup
Chapter 8. Locations 79