Lenovo IdeaCentre H520g Hardware Maintenance Manual page 71

Figure 3. Component locations
The following table lists the major FRUs shown in Figure 3 "Component locations" on page 67 and identifies
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
specific CRU is visible.
Number
1
Heat sink and fan assembly
2
Memory modules
3
Front bezel
4
Hard disk drive
5
PCI card (installed in some models)
6
PCI Express x16 graphics card slot
7
System board
8
Power supply assembly
FRU description
Self-service CRU Optional-service CRU
No
Yes
Yes
No
Yes
Yes
No
No
Chapter 8
Yes
No
No
Yes
No
NO
No
Yes
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Locations