Lenovo ThinkCentre Edge 91 (English) User Guide - Page 22
Locating connectors on the rear of your computer, connect the cables on your computer.
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Locating connectors on the rear of your computer Figure 2 "Rear connector locations" on page 10 shows the locations of the connectors on the rear of your computer. Some connectors on the rear of your computer are color-coded to help you determine where to connect the cables on your computer. 7 8 5 6 7 8 3 4 Figure 2. Rear connector locations 1 Voltage-selection switch (available on some models) 2 Power cord connector 3 Serial port (Serial port 1) 4 VGA monitor connector 5 DisplayPort connector 6 USB connectors (USB port 3 to 8) 7 Microphone connector 8 Audio line-out connector 9 Audio line-in connector 10 PCI Express x16 graphics card slot 11 PCI Express x1 card slot 12 PCI card slots (2) 13 Integrated cable lock (Kingston lock) slot 14 Padlock loop 15 Optional serial port (serial port 2) 16 Ethernet connector 17 PS/2 keyboard and mouse connectors (optional) Connector Audio line-in connector Audio line-out connector DisplayPort connector Description 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. Used to send audio signals from the computer to external devices, such as powered stereo speakers (speakers with built-in amplifiers), headphones, multimedia keyboards, or the audio line-in connector on a stereo system or other external recording device. Used to attach a high-performance monitor, a direct-drive monitor, or other devices that use a DisplayPort connector. 10 ThinkCentre Edge User Guide