Dell Dimension U7021 Owner's Manual page 72

DVI video connector
5
VGA video connector
6
security cable slot
7
sound card connectors
8
padlock ring
9
optional modem
10
connector
power connector
11
serial connector (COM 1)
12
parallel connector
13
diagnostic lights (4)
14
keyboard connector
15
mouse connector
16
USB 2.0 connectors (6)
17
card slots
18
power supply fans
19
72
Removing and Installing Parts
If your monitor has a DVI connector, plug it into the DVI connector on the computer. If
your monitor has a VGA connector, plug it into the VGA connector on the computer.
If your monitor has a DVI connector, plug it into the DVI connector on the computer. If
your monitor has a VGA connector, plug it into the VGA connector on the computer.
Use a security cable with the slot to help secure your computer.
• Line-in connector — Use the blue line-in connector to attach a record/playback
device such as a cassette player, CD player, or VCR.
• Microphone connector — Use the pink microphone connector to attach a personal
computer microphone for voice or musical input into a sound or telephony program.
• Line-out connector — Use the green line-out connector to attach headphones and
most speakers with integrated amplifiers.
• Surround connector — Use the black surround connector to attach multichannel-
capable speakers.
• Center/Low-Frequency Effects (LFE) connector — Use the yellow center/LFE
connector to attach your subwoofer.
Insert a padlock to lock the computer cover.
If you have a modem, connect a telephone cable to the modem connector (optional).
NOTE:
For optimum performance, install a modem card only in PCI slot 2, 3, or 4.
NOTE:
Do not plug a telephone cable into the network connector.
Insert the power cable.
Connect a serial device, such as a handheld device, to the serial port.
Connect a parallel device, such as a printer, to the parallel connector. If you have a USB
printer, plug it into a USB connector.
Use the lights to help you troubleshoot a computer problem based on the diagnostic
code. For more information, see "Diagnostics Lights" on page 53.
If you have a standard keyboard, plug it into the purple keyboard connector. If you have a
USB keyboard, plug it into a USB connector.
Plug a standard mouse into the green mouse connector. Turn off the computer and any
attached devices before you connect a mouse to the computer. If you have a USB mouse,
plug it into a USB connector.
Use the back USB connectors for devices that typically remain connected, such as
printers and keyboards.
It is recommended that you use the front USB connectors for devices that you connect
occasionally, such as joysticks or cameras.
Access connectors for any installed PCI cards (four slots) and PCI Express cards
(one x16 slot and one x1 slot).
For optimal cooling, two power supply fans are provided. Do not block the vents.