Lenovo IdeaCentre B520 - Manual (Page 28)

Hardware Maintenance Manual
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8 TV turner card
9 WLAN card
10 3D IR emitter
11 Bluetooth module
12 Rear I/O module
13 Camera
14 Touch module
15 Converter
16 System fans
17 Heatsink
18 3D module
19 Motherboard
20 Power supply
21 Chassis
22 LED panel
23 Front bezel
Identifying parts on the motherboard
The motherboard (sometimes called the planar or system board) is
the main circuit board in your computer. It provides basic computing
functions and supports a variety of devices that are factory-installed or
that you can install later.
The following illustration shows the locations of parts on the motherboard.