Dell T5500 Power Button Light Codes, Diagnostic Light Codes, Pre-POST Diagnostic Light Patterns

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2.If a problem is encountered during a test, a message appears with an error code and a description of the problem. Write down the error code and problem description and follow the instructions on the screen.

3.If you run a test from the Custom Test or Symptom Tree option, click the applicable tab described in the following table for more information.

Tab

Function

 

 

Results

Displays the results of the test and any error conditions encountered.

Errors

Displays error conditions encountered, error codes, and the problem description.

 

 

Help

Describes the test and may indicate requirements for running the test.

 

 

Configuration

Displays your hardware configuration for the selected device.

 

The Dell Diagnostics obtains configuration information for all devices from system setup, memory, and various internal tests, and it displays

 

the information in the device list in the left pane of the screen. The device list may not display the names of all the components installed on

 

your computer or all devices attached to your computer.

Parameters

Allows you to customize the test by changing the test settings.

 

 

4.When the tests are completed, if you are running the Dell Diagnostics from the Drivers and Utilities disc, remove the disc.

5.Close the test screen to return to the Main Menu screen. To exit the Dell Diagnostics and restart the computer, close the Main Menu screen.

Power Button Light Codes

The diagnostic lights give much more information about the system state, but legacy power light states are also supported in your computer. The power light states are shown in following table.

Power Light

Description

State

 

Off

 

 

Power is off, light is blank.

 

Blinking Amber Initial state of light at power up.

 

Indicates system has power, but the POWER_GOOD signal is not yet active.

 

If the Hard Drive light is off, it is probable that the power supply needs to be replaced.

 

If the Hard Drive light on, it is probable that an onboard regulator or VRM has failed. Look at the diagnostic lights for further information.

Solid Amber

Second state of the light at power up. Indicates the POWER_GOOD signal is active and it is probable that the power supply is fine. Look at

 

 

the diagnostic lights for further information.

Blinking Green

System is in a low power state, either S1 or S3. Look at the diagnostic lights to determine which state the system is in.

Solid Green

System is in S0 state, the normal power state of a functioning machine.

The BIOS will turn the light to this state to indicate it has started fetching opcodes.

Diagnostic Light Codes

Four (4) single color lights are incorporated on the front control panel to serve as a diagnostic aid for troubleshooting systems exhibiting No Post/No Video symptoms. The lights do NOT report runtime errors.

Each light has two possible states of OFF or ON. The most significant bit is labeled with the number 1, and the other three are labeled 2, 3, and 4, as you go down or across the LED stack. The normal operating condition after POST is for all four lights to be ON and then turn off as the BIOS hands over control to the operating system.

Pre-POST Diagnostic Light Patterns

State

Light Pattern

Light

Power

State Assignment

State Description

( 1 2 3 4 )

Description

Light

 

 

 

 

 

1- Off

 

 

 

Pb0a

 

2- Off

 

System

System is not plugged into AC, PSU is not plugged into system board, or control

 

3- Off

 

Unplugged

panel not connected to system board.

 

 

 

 

 

4- Off

 

 

 

 

 

1- Off

 

 

 

Pb0b

 

2- Off

 

ACPI S0; Normal

System is on with no failures detected. This is actually a BIOS controlled state and is

 

3- Off

 

Operation

also S0e.

 

 

 

 

 

4- Off

 

 

 

 

 

1- Off

 

 

 

Pb0c

 

2- Off

 

ACPI S1

Windows Standby State.

 

3- Off

 

 

 

 

 

 

 

 

4- Off

 

 

 

 

 

1- Off

 

 

 

Pb1

 

2- Off

 

ACPI S4 or S5

Hibernate or Soft off. System plugged in, but either turned off or in Windows

 

3- Off

 

Hibernation State.

 

 

 

 

 

 

4- Off

 

 

 

 

 

 

 

 

 

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Contents Page About Memory Supported Memory ConfigurationsMemory Modules Memory Subsystem Memory SlotsSingle CPU configurations 6 Dimm slots on MB Memory Population RulesClearing Forgotten Passwords System Board SchematicAbout Your System Board Clearing Cmos Settings Entering System Setup System SetupBoot Menu System Setup Navigation KeystrokesPage Dell Diagnostics DiagnosticsOption Function Diagnostic Light Codes Power Button Light CodesPre-POST Diagnostic Light Patterns Post Diagnostic Light Patterns State Light Pattern State Assignment State Description NameBeep Codes System Beep Codes DescriptionPage Adding and Replacing Parts Memory ProcessorSystem Information VideoDrives ConnectorsControls and Lights Physical EnvironmentalBattery Removing the BatteryRemove the coin-cell from the computer Cover Removing the CoverRemove the cover from the computer Hard-drive Bezel Removing the Hard-drive BezelRemove the hard drive bezel Page Front Bezel Removing the Front BezelPage Page Front Fan Assembly Removing the Front Fan AssemblyPage Page Removing the Floppy Drive Floppy DriveReplacing the Floppy Drive Hard Drives Removing the Hard DrivesPage Page Page Hard Drive Tray Lifting the Hard Drive TrayPage Page Chassis Intrusion Switch Removing the Chassis Intrusion SwitchPage Remove the intrusion switch from the computer Page Removing the I/O Data Cable Data CableReplacing the I/O Data Cable Memory and Memory Shroud Removing the Memory Shroud and Memory ModulesPage Page Removing the Memory Card Reader Memory Card ReaderReplacing the Memory Card Reader Optical Drive Removing the Optical DrivePage Page Page Heat Sink and Processor Removing the Heat Sink and ProcessorPage Page Page Dual Processor Riser Optional Removing the Optional Dual Processor RiserPage Page Page Page Page Page Remove the dual processor from the dual processor board Page Power Supply Removing the Power SupplyPage Page Page System Board Removing the System BoardPage Page Page Page Page Page Expansion Cards Removing an Expansion CardPage Page Turning Off Your Computer Working on Your ComputerBefore Working Inside Your Computer Windows VistaAfter Working Inside Your Computer
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T5500 specifications

The Dell T5500, part of the Precision series, is a workstation designed for professionals in creative and technical fields who require robust performance while managing complex tasks. Launched as a successor to its predecessor models, the T5500 is characterized by a blend of powerful computing capabilities, expandability, and reliability, making it a suitable choice for applications such as 3D modeling, graphic design, and scientific simulations.

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In summary, the Dell T5500 workstation is a powerful and flexible choice tailored for demanding applications across various industries. Its combination of dual Xeon processors, extensive memory capacity, versatile storage options, high-end graphics support, and robust connectivity make it an invaluable tool for professionals looking to enhance their productivity and streamline their workflows.
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