Dell Vostro 3902 Dell Vostro 3900/3902 Owners Manual - Page 24

Troubleshooting Your Computer, Diagnostic Power LED Codes - motherboard

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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 Power LED Light Status Off Blinking Amber Steady Amber Steady White Possible Cause Troubleshooting Steps The computer is either turned off • or is not receiving power. • • 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 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 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 then reinstall any cards. • Remove and then reinstall the graphics card, if applicable. • Ensure the power cable is connected to the motherboard and processor. Computer is in standby or this is • Press the power button to a computer fault error condition, including the power supply. Only the +5VSB rail on the power • bring the computer out of standby mode. Ensure all power cables are securely connected to the supply is working correctly. system board. • Ensure the main power cable and front panel cable are securely connected to the system board. 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. 24

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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
Power LED Light Status
Possible Cause
Troubleshooting Steps
Off
The computer is either turned off
or is not receiving power.
•
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 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 the computer
turns on properly.
•
Ensure the electrical outlet is
working by testing it with
another device, such as a
lamp.
Blinking Amber
Computer fails to complete
POST or processor failure.
•
Remove and then reinstall any
cards.
•
Remove and then reinstall the
graphics card, if applicable.
•
Ensure the power cable is
connected to the
motherboard and processor.
Steady Amber
Computer is in standby or this is
a computer fault error condition,
including the power supply. Only
the +5VSB rail on the power
supply is working correctly.
•
Press the power button to
bring the computer out of
standby mode.
•
Ensure all power cables are
securely connected to the
system board.
•
Ensure the main power cable
and front panel cable are
securely 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.
24