Dell OptiPlex SX280 - Manual (Page 5)

Connecting a VGA Monitor
If you have a VGA-compatible monitor, use the adapter cable to connect the cable from your monitor to the white DVI display connector on the back panel.
Connecting Two Monitors
Use the adapter cable to connect both a VGA monitor and a DVI monitor to the white DVI display connector on the back panel.
When you connect two monitors, the driver will detect this connection and activate the multimonitor functionality.
Dell recommends the use of Category 5 wiring and connectors for our customers' networks.
4 network activity
light
The amber light flashes when the computer is transmitting or receiving network data. A high volume of network traffic may make this
light appear to be in a steady "on" state.
5 line-out
connector
Use the green line-out connector to attach an amplified speaker set.
6 line-in connector Use the blue line-in connector to attach a record/playback device such as a cassette player, CD player, or VCR.
7 USB connectors
(5)
Connect USB devices such as a mouse, keyboard, printer, joystick, and computer speakers into any of the USB connectors.
8 serial connector Connect a serial device, such as a handheld device, to the serial connector.
9 video connector If you have a DVI-compatible monitor, plug the cable from your monitor into the white DVI display connector on the back panel.
If you have a VGA monitor, see " Connecting a VGA Monitor ."
10 power
connector
The connector for the power adapter.
11 diagnostic lights See " Diagnostic Lights " for a description of light codes that can help you troubleshoot problems with your computer.
1 adapter cable
1 adapter cable