Dell Precision T7400 (Late 2007) - Manual (Page 19)

Quick Reference Guide 19
4 5.25-inch drive
bay with special
3.5-inch drive
panel plate Can hold a CD/DVD drive, or a media card reader, a floppy
drive, or a SATA hard drive in a 5.25-inch drive bay carrier. The
drive-panel plate shown here is only for use with a floppy drive
or media card reader; you can install the plate in front of any of
the four 5.25-inch drive bays. For more information, see "Drive
Panels" in your User’s Guide.
The hard-drive carrier is only for use in the 5.25-inch drive bays.
The floppy-drive/media card reader and hard-drive carriers are
not interchangeable.
5 hard-drive
activity 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 a device such as your CD drive is operating.
6 IEEE 1394
connector Use the IEEE 1394 connector for high-speed data devices
such as digital video cameras and external storage devices.
7 USB 2.0
connectors (2) Use the front USB connectors for devices that you connect
occasionally, such as flash memory keys, cameras, or bootable
USB devices.
Dell recommends that you use the back USB connectors for
devices that typically remain connected, such as printers
and keyboards.
8 power button,
power light Press the power button to turn on the computer. The light in
the center of this button indicates the power state. For more
information, see "Controls and Lights" in your User’s Guide.
NOTE: To avoid losing data, do not use the power button to
turn off the computer. Instead, perform an operating system
shutdown.
9 Dell badge You can rotate the Dell badge so that "Dell" is read horizontally,
depending on whether you use the desktop or tower orientation.
10 headphone
connector Use the headphone connector to attach headphones.
11 microphone
connector Use the microphone connector to attach a personal computer
microphone for voice or musical input into a sound or
telephony program.
12 diagnostic
lights (4) Use these lights to help you troubleshoot a computer
problem based on the diagnostic code. For more information,
see "Diagnostic Lights" in your User’s Guide.
13 network link light The network link light is on when a good connection exists
between a 10-Mbps, 100-Mbps, or 1000-Mbps (or 1-Gbps)
network and the computer.