Dell K8504 manual Small Form Factor Computer Back View, No light The computer is turned off

5	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 36.
6	hard-drive activity light	This light flickers when the hard drive is in use.
7	power light	Turns on 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.
8	headphone connector	Use the headphone connector to attach headphones and most kinds of speakers.
9	microphone connector	Use the microphone connector to attach a microphone.
10	floppy drive	Insert a floppy disk into this drive.
11	CD/DVD drive	Insert a CD or DVD (if applicable) into this drive.

Small Form Factor Computer — Back View

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1	card slots	You can access connectors for any installed PCI and PCI Express cards.
2	back-panel connectors	Plug serial, USB, and other devices into the appropriate connector.
3	power connector	Connect the power cable to this connector.

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Quick Reference Guide