Dell GX280DT User Guide - Page 160

indicates that the network cable has been securely attached. NOTE: Do not plug a telephone cable into the network connector. On computers with a network connector card, use the connector on the card. 4 network activity light 5 line-in connector It is recommended that you use Category 5 wiring and connectors for your network. If you must use Category 3 wiring, force the network speed to 10 Mbps to ensure reliable operation. Flashes a yellow light 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. Use the blue line-in connector (available on computers with integrated sound) to attach a record/playback device such as a cassette player, CD player, or VCR. 6 line-out connector On computers with a sound card, use the connector on the card. Use the green line-out connector (available on computers with integrated sound) to attach headphones and most speakers with integrated amplifiers. 7 microphone connector On computers with a sound card, use the connector on the card. Use the pink microphone connector (available on computers with integrated sound) to attach a personal computer microphone for voice or musical input into a sound or telephony program. 8 USB 2.0 connectors (6) 9 diagnostic lights 10 video connector On computers with a sound card, the microphone connector is on the card. Use the back USB connectors for devices that typically remain connected, such as printers and keyboards. It is recommended that you use the front USB connectors for devices that you connect occasionally, such as joysticks or cameras, or for bootable USB devices. Use the lights to help you troubleshoot a computer problem based on the diagnostic code. For more information, see "Diagnostic Lights." Plug the cable from your VGA-compatible monitor into the blue connector. NOTE: If you purchased an optional graphics card, this connector will be covered by a cap. Connect your monitor to the connector on the graphics card. Do not remove the cap. 11 parallel connector NOTE: If you are using a graphics card that supports dual monitors, use the y-cable that came with your computer. Connect a parallel device, such as a printer, to the parallel connector. If you have a USB printer, plug it into a USB connector. NOTE: The integrated parallel connector is automatically disabled if the computer detects an installed card containing a parallel connector configured to the same address. For more information, see "System Setup Options." Inside Your Computer CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. CAUTION: To avoid electrical shock, always unplug your computer from the electrical outlet before opening the cover. NOTICE: Be careful when opening the computer cover to ensure that you do not accidentally disconnect cables from the system board.