Dell Precision 650: Light Pattern Problem Description Suggestion Resolution
Light Pattern Problem Description Suggestion Resolution: Dell Precision 650
Table of contents
- Notes, Notices, and Cautions Abbreviations and Acronyms
- Contents
- Finding Information and Assistance What Are You Looking For? Find it Here
- What Are You Looking For? Find it Here
- What Are You Looking For? Find it Here
- What Are You Looking For? Find it Here
- Setting Up Your Dell Precision™ 650 Computer Connect the keyboard and the mouse
- Connect the modem or the network cable
- Connect the monitor
- For single- and dual-monitor capable cards with a single connector
- For dual-monitor capable cards with 1 DVI and 1 VGA connector For dual-monitor capable cards with 2 DVI connectors
- Connect the speakers
- Connect the power cables and turn on the computer and monitor
- Install additional software or devices
- To access the User’s Guide from your hard drive: To access the User’s Guide from the CD: To access your User’s Guide from the Dell Support Site:
- Setting Up Your Dell Precision 450 Computer Connect the keyboard and mouse
- Connect the modem or network cable
- Connect the monitor
- For single- and dual-monitor capable cards with a single connector
- For dual-monitor capable cards with 1 DVI and 1 VGA connector For dual-monitor capable cards with 2 DVI connectors
- Connect the speakers
- Connect the power cables and turn on the computer and monitor
- Install Additional Software or Devices
- To access the User’s Guide from your hard drive: To access the User’s Guide from the CD: To access your User’s Guide from the Dell Support Site: Caring for Your Computer
- Solving Problems Resolving Software and Hardware Incompatibilities Windows XP
- Windows 2000
- Using System Restore in Windows XP Creating a Restore Point Restoring the Computer to an Earlier Operating State
- Using Last Known Good Configuration Other Options to Help Resolve Additional Device or Software Conflicts When to Use the Dell Diagnostics
- Starting the Dell Diagnostics Starting the Dell Diagnostics From Your Hard Drive
- Starting the Dell Diagnostics From the Drivers and Utilities CD Dell Diagnostics Main Menu Option Function
- Tab Function
- System Lights Power Light Hard-Drive Cause Corrective Action Light
- Power Light Hard-Drive Cause Corrective Action Light Beep Codes Error Messages Diagnostic Lights
- Diagnostic Light Codes Before POST Light Pattern Problem Description Suggested Resolution
- Light Pattern Problem Description Suggested Resolution Diagnostic Light Codes During POST Light Pattern Problem Description Suggestion Resolution
- Light Pattern Problem Description Suggestion Resolution
- Light Pattern Problem Description Suggestion Resolution
- Light Pattern Problem Description Suggestion Resolution
- Light Pattern Problem Description Suggestion Resolution
- Frequently Asked Questions How Do I... Solution Where to Find Additional Information
- How Do I... Solution Where to Find Additional Information
- Opening the Computer Cover
- Dell Precision 650 Computer
- Inside the Dell Precision 650 Computer
- Dell Precision 450 Computer
- Inside the Dell Precision 450 Computer

Light Pattern Problem Description Suggestion Resolution
No memory modules are
1 Reset the memory modules to ensure that your
detected.
computer is successfully communicating with the
memory.
A B C D
2 Restart the computer.
3 If the problem still exists, remove all the memory
modules and install one memory module in
memory module connector 4.
4 Restart the computer.
The following message appears: Alert!
Operating in Debug Mode. Please
Populate Memory in Pairs for Normal
www.dell.com | support.dell.com
Operation.
5 Press <F1> to boot to the operating system.
6 Run the System Memory test group in the Dell
Diagnostics.
7 If the memory module passes, shut down the
computer, remove the memory module, and 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.
NOTE: If necessary, the computer can operate in
debug mode until new memory modules are installed.
System board failure has
Perform the procedures in "System Board Problems" in
occurred.
your User’s Guide.
If the problem persists, contact Dell.
A B C D
= yellow
= green
= off
40 Setup and Quick Reference Guide

