Dell 755 manual Blinking or solid amber See Power Problems on

5	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 — See "Power Problems" on page 339.
			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 for Windows XP and Windows Vista" on page 292.
			See "Diagnostic Lights" on page 347 for a description of light codes that can help
			you troubleshoot problems with your computer.
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 347.
7	hard drive activity light		This light flickers when the hard drive is being accessed.
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	3.5-inch drive bay		Can contain an optional floppy drive, second hard drive, or optional media card
			reader.
11	5.25-inch drive bay		Can contain an optical drive. Insert a CD or DVD (if supported) into this drive.
Back View
	1	2	3	4	5	6

1	card slots	Access connectors for any installed PCI or PCI Express cards, PS/2 connector,
		eSATA connector, etc.
		NOTE: The back view of the computer is different if a riser is installed.
2	back panel connectors	Plug serial, USB, and other devices into the appropriate connectors (see "Back
		Panel Connectors" on page 89).
3	power connector	Insert the power cable.

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Desktop Computer