Quick Reference Guide 236 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.7 power button Press to turn on the computer.NOTE: The power button can also be used to wake the computer or to place it into apower-saving state. See "Power Management" for more information.NOTICE: To avoid losing data, do not use the power button to turn off thecomputer. Instead, perform an operating system shutdown.8 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."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."See "Diagnostic Lights" on page 37 for a description of light codes that can helpyou troubleshoot problems with your computer.9 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 37.10 microphone connector Use the microphone connector to attach a personal computer microphone forvoice or musical input into a sound or telephony program.11 headphone connector Use the headphone connector to attach headphones.12 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.
