Inside Your Computer; System Board Components - Dell OptiPlex GX280 User Manual

Documentation
devices.
9 diagnostic Use the lights to help you troubleshoot a computer problem based on the
lights diagnostic code. For more information, see
10 video Plug the cable from your VGA-compatible monitor into the blue connector.
connector
NOTE: If you purchased an optional graphics card, this connector will be
covered by a cap. Connect your monitor to the connector on the graphics
card. Do not remove the cap.
NOTE: If you are using a graphics card that supports dual monitors, use the
y-cable that came with your computer.
11 parallel Connect a parallel device, such as a printer, to the parallel connector. If you
connector have a USB printer, plug it into a USB connector.
NOTE: The integrated parallel connector is automatically disabled if the
computer detects an installed card containing a parallel connector configured
to the same address. For more information, see "System Setup Options."

Inside Your Computer

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions
located in the Product Information Guide.
CAUTION: To avoid electrical shock, always unplug your computer from the electrical outlet before
opening the cover.
NOTICE: Be careful when opening the computer cover to ensure that you do not accidentally disconnect cables
from the system board.
1 hard drive
2 internal speaker
3 chassis intrusion switch
4 system board
5 padlock ring and security cable slot

System Board Components

http://support.dell.com/support/edocs/systems/opgx280/en/ug/smtabout.htm#1054449
"Diagnostic
6 heat sink and blower assembly
7 power supply
8 floppy drive
9 CD/DVD drive
Lights."
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