Looking Up Fru Information - Lenovo ThinkStation 2551 Hardware Maintenance Manual

• 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
specific CRU is visible.
Number
1
Power supply assembly
2
Microprocessor
3
Heat sink and fan assembly
4
Optical drive (available in some models)
5
Power switch
6
Card reader (available in some models)
7
Front audio and USB assembly
8
System fan
9
Internal speaker
10
Thermal sensor
11
Cover presence switch (also called intrusion
switch, available in some models)
12
Battery
13
Hard disk drive
14
Memory module
15
Peripheral Component Interconnect (PCI) card
(available in some models)
16
System board
17
Keyboard
18
Mouse

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
FRU description Self-service CRU Optional-service CRU
No
No
No
Yes
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Chapter 9
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
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