20 Quick Reference Guidew w w . d e l l . c o m | s u p p o r t . d e l l . c o m6 IEEE 1394 connector(optional)Use the optional IEEE 1394 connectors for high-speed data devices such as digitalvideo cameras and external storage devices.7 USB 2.0 connectors (2) Use the front USB connectors for devices that you connect occasionally, such asflash memory keys or cameras, or for bootable USB devices (see system setup formore information on booting to a USB device).It is recommended that you use the back USB connectors for devices that typicallyremain connected, such as printers and keyboards.8 Dell™ badge rotationnotchTo rotate, place fingers around the outside of the badge, press in, and turn thebadge. You can also rotate the badge using the slot provided near the bottom ofthe badge.9 power button Press to turn on the computer.NOTICE: To avoid losing data, do not use the power button to turn off thecomputer. Instead, perform an operating system shutdown.NOTE: The power button can also be used to wake the computer or to place it into apower-saving state. See "Power Management" in your User’s Guide for moreinformation.10 power light The power light illuminates and blinks or remains solid to indicate different states:• No light — The computer is turned off.• Steady green — The computer is in a normal operating state.• Blinking green — The computer is in a power-saving state.• Blinking or solid amber — See "Power Problems" in your User’s Guide.To exit from a power-saving state, press the power button or use the keyboard orthe mouse if it is configured as a wake device in the Windows Device Manager. Formore information about sleep states and exiting from a power-saving state, see"Power Management" in your User’s Guide.See "Diagnostic Lights" on page 37 for a description of light codes that can helpyou troubleshoot problems with your computer.11 microphone connector Use the microphone connector to attach a personal computer microphone forvoice or musical input into a sound or telephony program.12 headphone connector Use the headphone connector to attach headphones.13 diagnostic lights (4) Use the lights to help you troubleshoot a computer problem based on thediagnostic code. For more information, see "Diagnostic Lights" on page 37.14 network link light The network link light is on when a good connection exists between a 10-Mbps,100-Mbps, or 1000-Mbps (or 1-Gbps) network and the computer.