- IBM User Guide Desktop PC 8122, 8123, 8124, 8131, 8137, 8138

Locating the connectors on the rear of your computer
The following illustration shows the locations of the connectors on the rear of the
computer.
1 Diagnostic LEDs 11 Ethernet connector
2 Voltage selection switch 12 USB connectors (2)
3 Power connector 13 Keyboard connector
4 Audio line in connector 14 Mouse connector
5 Audio line out connector 15 PCI Express (x16) graphics
adapter connector
(some models)
6 Microphone connector 16 PCI adapter connector
7 Serial connector (COM 1) 17 PCI adapter connector
8 Parallel connector 18 PCI Express (x1) adapter connector
9 VGA monitor connector 19 Serial connector (COM 2) (some models)
10 USB connectors (2)
Note: Some connectors on the rear of the computer are color-coded to help you
determine where to connect the cables on your computer.
8 User Guide