Lenovo IdeaCentre A720 Hardware Maintenance 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. HDMI-out connector
2. HDMI-in connector
3. USB 3.0 connector
4. Ethernet connector（RJ45）
5. Power connector
6. System fan connector
7. Scalar cable connector
8. Scalar cable connector
9. USB 2.0 connectors (2)
10. USB 3.0 connector
11. TV jack 1
12. TV jack 2 (Japan only)
13. Card reader
14. Microphone connector
15. Headphone connector
16. Optical drive eject button connector
17. Speaker connector
18. Optical drive connector
19. Solid state disk connector
20. Hard disk drive connector
21. Memory slot
22. CPU socket
.
Chapter 7 Locating connectors, controls and components
25