Back to Contents PageAbout Your Desktop ComputerDell™ OptiPlex™ GX280 Systems User's GuideFront ViewBack ViewInside Your ComputerSystem Board ComponentsFront View1 USB 2.0connectors(2)Use the front USB connectors for devices that you connect occasionally,such as joysticks or cameras, or for bootable USB devices (see "SystemSetup" for more information about booting to a USB device).It is recommended that you use the back USB connectors for devices thattypically remain connected, such as printers and keyboards.2 LAN indicatorlightIndicates that a LAN (network) connection is established.3 power button Press to turn on the computer.NOTICE: To avoid losing data, do not turn off the computer by pressingthe power button for 6 seconds or longer. Instead, perform an operatingsystem shutdown.NOTICE: If your operating system has ACPI enabled, when you pressthe power button the computer will perform an operating systemshutdown.4 Dell badge Can be rotated to match the orientation of your computer. To rotate,place fingers around the outside of the badge, press firmly, and turn thebadge. You can also rotate the badge using the slot provided near thebottom of the badge.5 power light Turns on and blinks or remains solid to indicate different states:¡ No light — The computer is turned off. (S4, S5, or mechanicalOFF)¡ Steady green — The computer is in a normal operatingstate.¡ Blinking green — The computer is in a power-saving state.(S1 or S3)¡ Blinking or solid amber — See "Power Problems."To exit from a power-saving state, press the power button or use thekeyboard or the mouse if it is configured as a wake device in theWindows Device Manager. For more information about sleep states andexiting from a power-saving state, see "Power Management."See "Diagnostic Lights" for a description of light codes that can help youtroubleshoot problems with your computer.6 diagnosticlightsUse the lights to help you troubleshoot a computer problem based on thediagnostic code. For more information, see "Diagnostic Lights."7 hard driveactivity lightFlickers when the hard drive is being accessed.8 headphoneconnectorUse the headphone connector to attach headphones and most kinds ofspeakers.9 microphoneconnectorUse the microphone connector to attach a microphone.10 floppy drive Insert floppy disk in this drive.