Dell OptiPlex 5055 A Series Small Form Factor OptiPlex 5055 Small Form Factor - Page 67

Troubleshooting, Diagnostic and Power LED codes

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6 Diagnostic and Power LED codes Troubleshooting Table 31. Power LED states 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 functional and in the On state. If the computer is not responding, do the following: • Ensure the display is connected and turned on. • If the display is connected and turned on, listen for a beep code. Troubleshooting 67

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Troubleshooting
Diagnostic and Power LED codes
Table 31. Power LED states
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.
•
If the display is connected
and turned on, listen for a
beep code.
6
Troubleshooting
67