Dell Dimension 4550 - Manual (Page 77)

Adding Parts 77
1 CD or DVD volume
control dial
Move the dial to adjust the volume of your audio CD or DVD disc.
2 CD or DVD drive
activity light
The drive activity light is on when the computer reads data from the CD or DVD
drive.
3 CD or DVD eject button Press this button to eject your CD from the CD or DVD drive.
4 floppy-drive eject
button*
Press this button to eject a floppy disk from the floppy drive.
5 floppy-drive light
button*
The floppy-drive light is on when the computer reads data from or writes data to
the floppy drive. Wait until this light turns off before you remove the floppy disk
from the drive.
6 hard drive light The hard-drive light is on when the computer reads data from or writes data to the
hard drive. The light might also be on when devices such as your CD player are
operating.
7 power button Press this button to turn on the computer.
NOTICE: To avoid losing data, do not use the power button to turn off the
computer. Instead, perform a Windows shutdown.
8 service tag The tag is used to identify your computer when you access the Dell Support
website or call technical support.
9 headphone connector Attach headphones.Use the headphone connector to attach headphones and most
kinds of speakers. You can then hear all of the sounds your computer emits, such
as system beeps and CDs.
10 USB 2.0 connectors (2) Use the front USB connectors for devices that you connect occasionally, such as
joysticks or cameras.
It is recommended that you use the back USB connectors for devices that typically
remain connected, such as printers and keyboards.
11 front-panel door Open the door to use the front-panel connectors.
*On computers with an optional floppy drive.