Dell OptiPlex 745 - Manual (Page 9)

Quick Reference Guide
9
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.
4 USB 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 50.
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 25 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 49 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.