Lenovo 8991 Laptop User Manual


 
Identifying parts on the system board
The system board (sometimes called the planar or motherboard) is the main circuit
board in your computer. It provides basic computer 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 system board (some
models).
1 Microprocessor fan connector 12 Front panel connector
2 Microprocessor and heat sink 13 SATA IDE connectors (2)
3 Memory connector 1 14 Front panel USB connectors (2)
4 Memory connector 2 15 SATA IDE connector (2)
5 Clear CMOS/Recovery jumper 16 PCI adapter connectors
6 Power connector 17 Front audio connector
7 Diskette drive connector 18 CD-IN connector
8 IDE connector 1 19 PCI Express x16 graphics adapter
connector
9 IDE connector 2 20 PCI Express x1 adapter connector
10 Battery 21 System fan connector
11 Power fan connector 22 12v power connector
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