Troubleshooting; Diagnostic Leds - Dell Precision R5500 Owner's Manual

Topics:
•

Diagnostic LEDs

• Beep Codes
• Error Messages
Diagnostic LEDs
NOTE: The diagnostic LEDs only serve as an indicator of the progress through the POST process. These LEDs do not
indicate the problem that caused the POST routine to stop.
The diagnostic LEDs are located on the front of the chassis next to the power button. These diagnostic LEDs are only active and visible
during the POST process. Once the operating system starts to load, they turn off and are no longer visible.
The system now includes pre-POST and POST LEDs in an attempt to help pinpointing a possible problem with the system easier and more
accurate.
NOTE: The diagnostic lights will blink when the power button is amber or off, and will not blink when it is blue. This has
no other significance.
Light Pattern
Diagnostic LEDs
Problem Description
Power
Button
LED
The computer is either turned off
or is not receiving power.

Troubleshooting

Troubleshooting Steps
• Re-seat the power cable in the power connector
at the back of the computer and the electrical
outlet.
• Bypass power strips, power extension cables, and
other power protection devices to verify that the
computer turns on properly.
• Ensure that any power strips being used are
plugged into an electrical outlet and are turned on.
• Ensure that the electrical outlet is working by
testing it with another device, such as a lamp.
• Ensure that the main power cable and front panel
cable are securely connected to the system board.
Troubleshooting
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