Dell 745c, TJ021 You Begin on page 13 for more information, No light The computer is turned off

1	5.25-inch drive bay	Can contain an optical drive. Insert a CD or DVD (if supported) into this drive.
2	5.25-inch drive bay	Can contain an optical drive. Insert a CD or DVD (if supported) into this drive.
3	3.5-inch drive bay	Can contain an optional floppy drive or optional media card reader.

4USB 2.0 connectors (2) Use the front USB connectors for devices that you connect occasionally, such as joysticks or cameras, or for bootable USB devices (see your online User’s Guide for more information on booting to a USB device).

		It is recommended that you use the back USB connectors for devices that
		typically remain connected, such as printers and keyboards.
5	LAN indicator light	This light indicates that a LAN (local area network) connection is established.
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 25.
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. See "Before
		You Begin" on page 13 for more information.
		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 modes:
		• 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 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.
		See "System Lights" on page 24 for a description of light codes that can help you
		troubleshoot problems with your computer.
9	hard-drive activity light	This light flickers when the hard drive is being accessed.
10	headphone connector	Use the headphone connector to attach headphones and most kinds of speakers.
11	microphone connector	Use the microphone connector to attach a microphone.

Quick Reference Guide

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