Symptoms

Table of Contents : Power Button status to determine Status of the systemPower 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 LEDPower StateDescription 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. Back to Top 2. Power Button & Diagnostics LED’s Status of the system LED Pattern (1234)LED DescriptionPower LEDState AssignmentState 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 Back to Top