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
specific CRU is visible.
Number
FRU description
Self-service CRU
Optional-service CRU
1
Power supply assembly
No
Yes
2
Memory modules
Yes
No
3
Heat sink and fan assembly
No
Yes
4
Optical drive (available on some models)
Yes
No
4
Flex module (available on some models)
No
Yes
4
5.25-inch assembly (available on some models)
No
Yes
5
Front Wi-Fi antenna (available on some models)
No
Yes
6
Card reader (available on some models)
No
No
7
Front audio and USB assembly
Yes
No
8
Front bezel
Yes
No
9
Power button
No
No
10
System fan
No
Yes
11
Internal speaker (available on some models)
No
No
12
Thermal sensor
No
No
13
Cover presence switch (also called intrusion
switch, available on some models)
No
No
14
Hard disk drive, hybrid drive, or solid-state drive
Yes
No
15
Wi-Fi card module (available on some models)
No
Yes
16
Wi-Fi adapter card (available on some models)
No
Yes
17
Rear Wi-Fi antenna (available on some models)
Yes
No
18
PCI card (available on some models)
No
Yes
19
System board
No
No
20
Battery
No
Yes
21
Microprocessor
No
No
22
Keyboard
Yes
No
23
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
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ThinkStation P300 Hardware Maintenance Manual
Summary of Contents for ThinkStation P300
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