Quick Reference Guide

12 Quick Reference Guide
5 USB 2.0 connectors (2) Use the USB connectors on the front of the computer for devices that you connect
occasionally, such as joysticks or cameras, or for bootable USB devices.
It is recommended that you use the USB connectors on the back of the computer for
devices that typically remain connected, such as printers and keyboards.
6 diagnostic lights Use the lights to help you troubleshoot a computer problem based on the diagnostic
code (for more information, see "Diagnostic Lights" on page 34).
7 power button Press this button to turn on the computer.
NOTICE: To avoid losing data, do not turn off the computer by pressing the power
button. Instead, perform an operating system shutdown.
NOTICE: If your operating system has ACPI enabled, when you press the power
button the computer will perform an operating system shutdown.
8 power light The power light illuminates and blinks or remains solid to indicate different operating
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 mode.
• Blinking or solid amber — The computer is receiving electrical power, but an internal
power problem might exist. See "Power Problems" in your online
User’s Guide .
To exit from a power-saving mode, press the power button or use the keyboard or the
mouse if it is configured as a wake device in the Windows Device Manager. For more
information about sleep modes and exiting from a power-saving mode, see your online
User’s Guide.
For a description of light codes that can help you troubleshoot problems with your
computer, see "System Lights" on page 32.
9 headphone connector Use the headphone connector to attach headphones.
10 microphone connector Use the microphone connector to attach a microphone.
11 LAN indicator light This light indicates that a LAN (local area network) connection is established.
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