Looking Up Fru Information - Lenovo ThinkStation 2551 Hardware Maintenance Manual

• 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
specific CRU is visible.
Number
1
Heat sink and fan assembly
2
System board
3
Microprocessor
4
Memory modules
5
Hard disk drive
6
Optical drive (available in some models)
7
Card reader (available in some models)
8
Front fan assembly
9
Graphics (PCI) card (available in some models)
10
Rear fan assembly
11
Power supply assembly
12
Keyboard
13
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
Yes
Yes
Yes
No
Yes
No
No
Yes
Yes
Chapter 9
Yes
No
No
No
No
No
No
Yes
No
Yes
Yes
No
No
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Locations