Lenovo H520s Desktop - Manual (Page 31)

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 location of connectors and components on the
front of the motherboard.
1 2 3 4 5
6
7
8
9
1 0 1 1 1 2 1 4 1 3 1 5 1 6 1 7 1 8
1. 12V power connector 11. Front panel connector
2. Microprocessor and heat sink 12. Clear CMOS jumper
3. Microprocessor fan header 13. Front USB connectors (2)
4. Memory slots (2) 14. Mini PCI-E slot
5. Thermal sensor header 15. Mode switch connector
6. Power connector 16. Serial (COM2) connector
7. Battery 17. PCI express X 1 adapter slots (3)
8. SATA connectors (3) 18. Front audio connector
9. eSATA connector 19. PCI express X 16 adapter slot
10. Power fan header 20. System fan header
Chapter 7 . Locating connectors, controls and components 25