Dell OptiPlex 3046 Small Form Factor Owners Manual - Page 24

Troubleshooting your computer, Diagnostic power LED codes

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3 Troubleshooting your computer You can troubleshoot your computer using indicators like diagnostic lights, beep codes, and error messages during the operation of the computer. Diagnostic power LED codes Table 1. Diagnostic power LED codes Power LED light status Off Steady/blinking amber Slow Blinking white light Steady white Possible cause Troubleshooting steps The computer is either turned off or is not receiving power • or in Hibernation mode. • • Re-seat the power cable in the power connector on the back of the computer and the electrical outlet. If the computer is plugged into a power strip, ensure that the power strip is plugged into an electrical outlet and is turned on. Also, bypass power protection devices, power strips, and power extension cables to verify that the computer turns on properly. Ensure the electrical outlet is working by testing it with another device, such as a lamp. Computer fails to complete POST or processor failure. • Remove and reinstall any cards. • Remove and reinstall the graphics card, if applicable. • Ensure the power cable is connected to the system board and processor. Computer is in sleep mode. • Press the power button to bring the computer out of the sleep mode. • Ensure all power cables are securely connected to the system board. • Ensure the main power cable and front panel cable are connected to the system board. The computer is fully If the computer is not functional and in the On state. responding, do the following: • Ensure the display is connected and turned on. Troubleshooting your computer 24

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Troubleshooting your computer
You can troubleshoot your computer using indicators like diagnostic lights, beep codes, and error messages during the
operation of the computer.
Diagnostic power LED codes
Table 1. Diagnostic power LED codes
Power LED light status
Possible cause
Troubleshooting steps
Off
The computer is either turned
off or is not receiving power
or in Hibernation mode.
•
Re-seat the power cable in
the power connector on
the back of the computer
and the electrical outlet.
•
If the computer is plugged
into a power strip, ensure
that the power strip is
plugged into an electrical
outlet and is turned on.
Also, bypass power
protection devices, power
strips, and power
extension cables to verify
that the computer turns
on properly.
•
Ensure the electrical outlet
is working by testing it
with another device, such
as a lamp.
Steady/blinking amber
Computer fails to complete
POST or processor failure.
•
Remove and reinstall any
cards.
•
Remove and reinstall the
graphics card, if
applicable.
•
Ensure the power cable is
connected to the system
board and processor.
Slow Blinking white light
Computer is in sleep mode.
•
Press the power button to
bring the computer out of
the sleep mode.
•
Ensure all power cables
are securely connected to
the system board.
•
Ensure the main power
cable and front panel
cable are connected to
the system board.
Steady white
The computer is fully
functional and in the On state.
If the computer is not
responding, do the following:
•
Ensure the display is
connected and turned on.
3
Troubleshooting your computer
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