20TroubleshootingDiagnostic LEDsNOTE: The diagnostic LEDs only serve as an indicator of the progress through thePower-on Self-Test (POST) process. These LEDs do not indicate the problem thatcaused 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 theoperating 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 identifying apossible problem with the system easier and more accurate.NOTE: The diagnostic lights will blink when the power button is amber or off, andwill not blink when it is blue. This has no other significance.Diagnostic Light PatternsLEDPower ButtonProblemDescriptionThe computer is either turned off or is not receiving power.TroubleshootingSteps – Re-seat the power cable in the power connector at theback of the computer and the electrical outlet.– Bypass power strips, power extension cables, and otherpower protection devices to verify that the computerturns on properly.73
