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Figure 2. Rear connector and part locations
1 Power cord connector 9 Audio line-in connector
2 Voltage-selection switch (available on some
models)
10 PCI Express x16 graphics card slot
3 PS/2 keyboard connector 11 PCI Express x1 card slots (2)
4 DVI monitor connector
12 PCI card slot
5 VGA monitor connector 13 Serial port (available in some models)
6 USB connectors (4)
14 Ethernet connector
7 Microphone connector
15 Serial port
8 Audio line-out connector
16 PS/2 mouse connector
Connector Description
Audio line-in connector
Used to receive audio signals from an external audio device, such as a stereo
system. When you attach an external audio device, a cable is connected between
the audio line-out connector of the device and the audio line-in connector of
the computer.
Audio line-out connector
Used to send audio signals from the computer to external devices, such as
powered stereo speakers (speakers with built-in ampliers), headphones,
multimedia keyboards, the audio line-in connector on a stereo system, or other
external recording devices.
DVI monitor connector Used to attach a DVI monitor or other devices that use a DVI monitor connector.
Ethernet connector
Used to attach an Ethernet cable for a local area network (LAN).
Note: To operate the computer within FCC Class B limits, use a Category 5
Ethernet cable.
Microphone connector Used to attach a microphone to your computer when you want to record sound or
if you use speech-recognition software.
PS/2 keyboard connector Used to attach a keyboard that uses a PS/2 keyboard connector.
PS/2 mouse connector Used to attach a mouse, a trackball, or other pointing devices that use a PS/2
mouse connector.
8 ThinkCentre User Guide