Dell OptiPlex SX280 - Manual (Page 4)

Side View
Back View
Back-Panel Connectors
1 vents The vents, which are on each side of the computer, allow air to flow through your computer. To ensure proper ventilation, do not block these
cooling vents.
1 diagnostic lights See " Diagnostic Lights " for a description of light codes that can help you troubleshoot problems with your computer.
2 computer cover release knob Rotate this knob in a clockwise direction to remove the cover.
3 back-panel connectors The connectors for your computer.
4 power connector The connector for the power adapter.
5 vents The vents allow air to flow through your computer. To ensure proper ventilation, do not block these cooling vents.
1 parallel
connector
Connect a parallel device, such as a printer, to the parallel connector. If you have a USB printer, plug it into a USB connector.
2 link integrity
light
l Green — A good connection exists between a 10-Mbps network and the computer.
l Orange — A good connection exists between a 100-Mbps network and the computer.
l Yellow — A good connection exists between a 1000-Mbps (1-Gbps) network and the computer.
l Off — The computer is not detecting a physical connection to the network or the Network Controller is turned off in system
setup.
3 network
adapter
Attach the UTP cable to an RJ45 jack wall plate or to an RJ45 port on a UTP concentrator or hub and press the other end of the UTP
cable into the network adapter connector until the cable snaps securely into place.