Article Number: 000145408

Power Button LED status on PRECISION T3600/T5600/T7600 systems

Summary: Explanation for each of the power LED indicators on your Precision T3600, T5600 or T7600 system

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Article Content

Symptoms

Table of Contents :

Power Button status to determine Status of the system
Power Button & Diagnostics LED’s Status of the system

Article Summary: Power Button LED status on PRECISION T3600/T5600/T7600 systems.

1. Power Button status to determine Status of the system

Power LED	Power State	Description
	S4 or S5	System is in the off state, hibernate or suspend to Disk.
	--	Boot Failure : This is a system fault error condition, including the power supply. Only the +5VSB rail on the power supply is working correctly.
	--	Boot Failure : The computer is receiving electrical power, and power supplied by the power supply is normal. A device might be malfunctioning or incorrectly installed.
	S1 or S3	System is in power saving state - Sleep or Stand By mode. No fault/error condition
	S0	Normal Operation, system is fully functional.

2. Power Button & Diagnostics LED’s Status of the system

LED Pattern (1234)	LED Description	Power LED	State Assignment	State Description
	1- Off 2- Off 3- Off 4- Off		System Unplugged	System is not plugged into AC, PSU is not plugged into system board, or control panel not connected to system board.
	1- Off 2- Off 3- Off 4- Off		ACPI S0; Normal Operation	System is on with no failures detected. This is actually a BIOS controlled state and is also S0e.
	1- Off 2- Off 3- Off 4- Off		ACPI S1	Windows Standby State.
	1- Off 2- Off 3- Off 4- Off		ACPI S4 or S5	Hibernate or Soft off. System plugged in, but either turned off or in Windows Hibernation State.
	1- Off 2- Off 3-Solid 4- Off	-	Reserved	Reserved
	1- Off 2- Off 3- Solid 4- Solid		ACPI S3	Suspend to RAM Windows Standby State.
	1- Off 2- Green 3- Off 4- Off	-	Reserved	Reserved
	1- Off 2- Green 3- Off 4- Green	-	Reserved	Reserved
	1- Off 2- Green 3- Green 4- Off	-	Reserved	Reserved
	1- Off 2- Blink 3- Blink 4- Blink		ACPI S0, hand off to BIOS control	System on. BIOS not execution. This is the transition state to POST states.
	1- Green 2- Off 3- Off 4- Off	-	Reserved	Reserved
	1- Blink 2- Off 3- Off 4- Blink		Non-System board Regulator Failure	A power failure has been detected on a plug-in component such as VRM, Video Riser, or Memory Riser.
	1- Blink 2- Off 3- Blink 4- Off		PSU Failure	PSU may be bad or PSU cable may be crimped creating a short on a main power rail. (PS_ON asserted, PS_PWRGOOD not asserted)
	1- Blink 2- Off 3- Blink 4- Blink		PSU Cable Failure	All PSU cables may not be properly connected to system board. (PS_ON asserted, missing a main power rail)
	1- Blink 2- Blink 3- Off 4- Off		System board Regulator Failure	A power failure has been detected in one of the onboard system board regulators. This could be caused by a failed system board component or by a plug-in device creating a short on a regulated power rail. (PS_ON asserted, PS_PWRGOOD asserted, SYS_PWRGOOD de-asserted)
	1- Blink 2- Blink 3- Off 4- Blink		Mismatch	Hardware detected a population incompatibility with a critical system component such as CPU, VRM, PSU, or MEMORY RISER.
	1- Green 2- Green 3- Green 4- Off	-	Reserved	Reserved
	1- Green 2- Green 3- Green 4- Green	-	Reserved	Reserved

Article Properties

Affected Product

Precision T3600, Precision T5600, Precision T7600

Last Published Date

10 Apr 2021

Version

3

Article Type

Solution

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