Dell Dimension E521 - Manual (Page 12)

12
Setting Up and Using Your Computer
5 FlexBay drive Can contain an optional floppy drive or optional Media Card
Reader. For information on using the Media Card Reader, see
"Using a Media Card Reader (Optional)" on page 22.
6 microphone connector Use the microphone connector to attach a personal computer
microphone for voice or musical input into a sound or
telephony program.
On computers with a sound card, the microphone connector is
on the card.
7 headphone connector Use the headphone connector to attach headphones and most
kinds of speakers.
8 diagnostic lights (4) Use the lights to help you troubleshoot a computer problem
based on the diagnostic code. For more information, see
"Diagnostic Lights" on page 49.
9 hard-drive activity light The hard drive activity light is on when the computer reads
data from or writes data to the hard drive. The light might also
be on when a device such as a CD player is operating.
10 power button,
power light Press the power button to turn on the computer. The light in
the center of this button indicates power state. See "Controls
and Lights" on page 109 for more information.
NOTICE:
To avoid losing data, do not use the power button
to turn off the computer. Instead, perform an operating
system shutdown.
11 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 "System Setup Options" on page 112 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.
12 vents For adequate cooling, do not block any of the vents.
NOTICE:
Ensure that there is a minimum of two inches of
space between all vents and any object near these vents.
NOTICE:
Keep the vent area clean and dust-free to ensure
that the computer is adequately ventilated. Use only a dry
cloth to clean the vent area to avoid water damage to the
computer.
book.book Page 12 Monday, July 23, 2007 3:47 PM