Back View of the ComputerBack to Contents Page13 microphoneconnectorUse the microphone connector to attach a personal computermicrophone for voice or musical input into a sound or telephonyprogram.14 Service Tag Used to identify your computer when you access the Dell Supportwebsite or call technical support.1 powerconnectorInsert the power cable.2 sound cardconnectors(5)l Line-in connector — Use the blue line-in connector to attach arecord/playback device such as a cassette player, CD player, or VCR.l Line-out connector — Use the green line-out connector to attachheadphones and most speakers with integrated amplifiers.l Microphone connector — Use the pink microphone connector toattach a personal computer microphone for voice or musical inputinto a sound or telephony program.l Surround connector — Use the black surround connector to attachmultichannel-capable speakers.l Center/subwoofer (Center/LFE) connector — Use the yellowsubwoofer connector to attach multiple speakers.3 networkconnectorTo attach your computer to a network or broadband device, connect oneend of a network cable to either a network port or your network orbroadband device. Connect the other end of the network cable to thenetwork connector on your computer. A click indicates that the networkcable 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 thecard.4 USB 2.0connectors(5)Use the back USB connectors for devices that typically remain connected,such as printers, keyboards, and mice, or for bootable USB devices whichmay not function properly if attached to the front connectors (see "SystemSetup" for more information on booting to a USB device)It is recommended that you use the front USB connectors for devices thatyou connect occasionally, such as joysticks or cameras.5 card slots (6) Access connectors for any installed PCI or PCI Express cards.