Dell Precision 360: Diagnostic Lights Light Pattern Problem Description Suggested Resolution
Diagnostic Lights Light Pattern Problem Description Suggested Resolution: Dell Precision 360
Table of contents
- Notes, Notices, and Cautions Abbreviations and Acronyms
- Contents
- Finding Information for Your Computer 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 Computer
- 6 Verify that the voltage selection switch is set correctly for your location. Press the power buttons to turn on the computer and monitors.
- Mini-Tower Setup — Without Expansion Cards
- Mini-Tower Setup — With Expansion Card
- Desktop Setup — Without Expansion Cards
- Desktop Setup — With Expansion Cards
- Monitor Connections For 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
- Completed Setup
- Opening the Computer Cover
- While you work, periodically touch any unpainted metal surface on the computer to dissipate any static electricity that could harm internal components.
- Inside Your Computer Mini-Tower Computer
- Desktop Computer
- Solving Problems Resolving Software and Hardware Incompatibilities Microsoft Windows XP
- Windows 2000
- Using System Restore in Windows XP Creating a Restore Point Restoring the Computer to an Earlier Operating State
- Using the Last Known Good Configuration in Windows 2000 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 Beep Codes
- Error Messages System Lights Power Light Hard-Drive Problem Description Suggested Resolution Light
- Power Light Hard-Drive Problem Description Suggested Resolution Light
- Diagnostic Lights Light Pattern Problem Description Suggested Resolution
- Light Pattern Problem Description Suggested Resolution
- Light Pattern Problem Description Suggested Resolution
- Frequently Asked Questions How Do I... Solution Where to Find Additional Information
Diagnostic Lights
To help you troubleshoot a problem, your computer is equipped with four lights labeled “A,”
“B,” “C,” and “D.” Diagnostic lights are located on the back of the mini-tower computer
and on the front of the desktop computer. When the computer starts normally, the lights
flash. After the computer starts, all four lights will display solid green. If the computer
malfunctions, the color and sequence of the lights identify the problem.
Light Pattern Problem Description Suggested Resolution
A possible microprocessor failure has
Reinstall the microprocessor and restart the
occurred.
computer. See your User’s Guide for
information on how to reinstall the
www.dell.com | support.dell.com
A B C D
microprocessor for your computer.
Memory modules are detected, but a memory
1 Remove and reinstall all memory modules.
failure has occurred.
Ensure that all the connector tabs are
locked. For optimal performance, install
A B C D
the DIMMs in pairs (1 and 2 and 3 and 4).
2 Restart the computer.
A possible expansion card failure has
1 Determine if a conflict exists by removing
occurred.
a card (not the video card) and then
restarting the computer.
A B C D
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” in your
User’s Guide).
4 If the problem persists, contact Dell.
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30 Setup and Quick Reference Guide
