Diagnostic Lights. Dell Precision 690


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Diagnostic Lights. Dell Precision 690 | Manualzz

Code

4-4-3

4-4-4

Cause

Math-coprocessor test failure

Cache test failure

Error Messages

NOTE:

If the message is not listed, see the documentation for either the operating system or the program that was running when the message appeared.

If an error occurs during start-up, a message may be displayed on the monitor identifying the problem.

See "Error Messages" in the User’s Guide for suggestions on resolving any problems.

Diagnostic Lights

CAUTION:

Before you begin any of the procedures in this section, follow the safety instructions in the Product

Information Guide .

To help you troubleshoot a problem, your computer has four lights labeled "1," "2," "3," and "4" on the front.

The lights can be "off" or green. When the computer starts normally, the lights flash. If the computer malfunctions, the pattern of the lights and also that of the power button help to identify the problem.

These lights also indicate sleep states.

Diagnostic Light Codes Before POST

Diagnostic Lights Power

Light off

Problem Description Suggested Resolution off

No electrical power is supplied to the computer.

Connect the computer to an electrical outlet.

Ensure that the front-panel power light is on. If the power light is off, ensure that the computer is connected to a working electrical outlet and then press the power button.

If the problem is still not resolved, contact Dell for technical assistance.

The computer is in a normal off condition; the computer is connected to an electrical outlet.

Press the power button to turn the computer on.

If the computer does not turn on, ensure that the front-panel power light is on. If the power light is off, ensure that the computer is connected to a working electrical outlet and then press the power button.

If the problem is still not resolved, contact Dell for technical assistance.

Quick Reference Guide

35

Diagnostic Lights

(blinking)

(blinking)

Power

Light blinking green blinking green amber blinking amber amber

Problem Description Suggested Resolution

The computer is in a reduced power or "sleep" state.

Use one of the appropriate methods to "wake up" the computer. See "Advanced Features" in your User’s Guide .

If the problem is not resolved and you are trying to wake the computer with a USB mouse or keyboard, substitute the mouse or keyboard with a working PS/2 mouse or keyboard and then try to wake the computer.

The computer is in a reduced power or "sleep" state.

Use one of the appropriate methods to "wake up" the computer. See "Advanced Features" in your User’s Guide .

If the problem is not resolved and you are trying to wake the computer with a USB mouse or keyboard, substitute the mouse or keyboard with a working PS/2 mouse or keyboard and then try to wake the computer.

The BIOS is not executing.

Ensure that the processor is seated correctly and restart the computer. See "Processor" in your

User’s Guide .

If the problem is still not resolved, contact Dell for technical assistance.

A possible power supply or power cable failure has occurred.

A possible system board failure has occurred.

Perform the procedure in "Power Problems" in your User’s Guide .

If the problem is still not resolved, contact Dell for technical assistance.

Contact Dell for technical assistance.

(blinking) amber A processor mismatch exists.

Perform the procedure in "Processor Problems" in your User’s Guide .

(blinking)

(blinking) amber A possible failure has been detected in a plug-in component such as a graphics riser card or memory riser card.

Verify that any required power cables are connected to the memory and graphics riser cards.

Perform the procedure in "Power Problems" in your User’s Guide .

36

Quick Reference Guide

Diagnostic Lights Power

Light amber

Problem Description Suggested Resolution

A possible power supply failure has occurred.

Verify that both power supply cables are plugged in to the motherboard.

(blinking)

Diagnostic Light Codes During POST

The power light displays a solid green for diagnostic light codes during POST.

Light Pattern Problem Description

A possible processor failure has occurred.

A possible expansion card failure has occurred.

Suggested Resolution

Reinstall the processor and restart the computer.

1 Determine if a conflict exists by removing a card (not the graphics card) and then restarting the computer.

2 If the problem persists, reinstall the card that you removed, remove a different card, and then restart the computer.

3 Repeat this process for each card.

If the computer starts normally, troubleshoot the last card removed from the computer for resource

conflicts (see "Resolving Software and Hardware Incompatibilities" on page 30).

4 Move each card one at a time to a different PCI slot and restart the computer after each move.

5 If the problem persists, contact Dell .

Quick Reference Guide

37

Light Pattern Problem Description

A possible graphics card failure has occurred.

A possible floppy or hard drive failure has occurred.

Suggested Resolution

1 If the computer has a graphics card, remove the card, reinstall it, and then restart the computer.

2 If the problem still exists, install a graphics card that you know works and restart the computer.

3 If the problem persists or the computer has integrated graphics, contact Dell .

Reseat all power and data cables and restart the computer.

A possible USB failure has occurred.

Reinstall all USB devices, check cable connections, and then restart the computer.

38

Quick Reference Guide

Light Pattern Problem Description

No memory modules are detected.

Suggested Resolution

1 Reseat the memory modules to ensure that your computer is successfully communicating with the memory.

2 Restart the computer.

3 If the problem still exists, remove all the memory modules and install one memory module in memory module connector DIMM_1.

4 Restart the computer.

A message appears stating that because your memory is not paired, the system will operate with reduced performance and reduced errorcorrection capability

5 Press <F1> to boot to the operating system.

6 Run the Dell Diagnostics. See your

User’s Guide for more information.

7 If the memory module passes, shut down the computer, remove the memory module, and then repeat the process with the remaining memory modules until a memory error occurs during start-up or diagnostic testing.

If the first memory module tested is defective, repeat the process with the remaining modules to ensure that the remaining modules are not defective.

8 When the defective memory module is identified, contact Dell for a replacement .

Quick Reference Guide

39

Light Pattern Problem Description

No memory modules are detected.

Suggested Resolution

• If you have one memory module installed, reinstall it and restart the computer.

• If you have two or more memory modules installed, remove the modules, reinstall one module, and then restart the computer). If the computer starts normally, reinstall an additional module. Continue until you have identified a faulty module or reinstalled all modules without error.

• If available, install properly working memory of the same type into your computer.

• If the problem persists, contact Dell.

Contact Dell for technical assistance .

System board failure has occurred.

Memory modules are detected, but a memory configuration or compatibility error exists.

• Ensure that no special memory module/memory connector placement requirements exist.

• Verify that the memory modules that you are installing are compatible with your computer.

• Reinstall the memory modules and restart the computer.

• If the problem persists, contact Dell.

Routine system activity preceding video initialization.

Watch your monitor for on-screen messages.

40

Quick Reference Guide

Light Pattern Problem Description

A possible expansion card failure has occurred.

Suggested Resolution

1 Determine if a conflict exists by removing a card (not a graphics card) and restarting the computer.

2 If the problem persists, reinstall the card that you removed, remove a different card, and then restart the computer.

3 Repeat this process for each card.

If the computer starts normally, troubleshoot the last card removed from the computer for resource

conflicts (see "Resolving Software and Hardware Incompatibilities" on page 30).

4 If the problem persists, contact Dell.

Routine system activity preceding video initialization.

Watch your monitor for on-screen messages.

The computer is in a normal operating condition after POST.

NOTE:

The diagnostic lights flicker briefly; they are turned off after the computer successfully boots to the operating system.

None.

Quick Reference Guide

41

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