
System Board Connectors
Small Form Factor
one 5-pin connector
Password clear jumper
one 3-pin connector
RTC reset jumper
one 3-pin connector
Internal speaker
one 5-pin connector
Intruder connector
one 3-pin connector
Power connector
one 24-pin and one 4-pin connector
Controls and Lights
Front of the computer:
Power button light
Blue light — Solid blue light
indicates power-on state; blinking
blue light indicates sleep state of
the computer.
Amber light — Solid amber light
when the computer does not start
indicates a problem with the
system board or power supply.
Blinking amber light indicates a
problem with the system board.
Drive activity light
Blue light — Blinking blue light
indicates that the computer is
reading data from or writing data to
the hard drive.
Diagnostic lights
Four lights located on the front
panel of the computer. For more
information on the diagnostic lights,
see the Service Manual at
support.dell.com/manuals.
Back of the computer:
Power supply diagnostic light
Green light — The power supply is
turned on and is functional. The
power cable must be connected to
the power connector (at the back
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Содержание OptiPlex 390 Mini-Tower
Страница 1: ...Dell OptiPlex 390 Mini Tower Owner s Manual Regulatory Model D12M Regulatory Type D12M001 ...
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Страница 36: ...8 Pry the power switch cable free 9 Slide the power switch cable out through the front of the computer 36 ...
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Страница 52: ...7 Remove the screws that secure the system board to the computer 52 ...
Страница 53: ...8 Slide the system board towards the front of the computer 53 ...
Страница 54: ...9 Carefully tilt the system board to 45 degrees and then lift the system board out of the computer 54 ...
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