Dell OptiPlex K8504 Quick Reference Manual page 9

5 diagnostic lights
6 power button
7 power light
8 hard-drive activity light
9 headphone connector
10 microphone connector
Use these lights to help you troubleshoot a computer problem based on the diagnostic
code. For more information, see "Diagnostic Lights" on page 36.
Press this button to turn on the computer.
NOTICE:
To avoid losing data, do not turn off the computer by pressing the power
button for 6 seconds or longer. 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.
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 — 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 "Power
Management" in your online User's Guide.
See "System Lights" on page 35 for a description of power light patterns that can help
you troubleshoot problems with your computer.
This light flickers when the hard drive is in use.
Use the headphone connector to attach headphones and most kinds of speakers.
Use the microphone connector to attach a microphone.
Quick Reference Guide
9