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Troubleshooting
Dell™ Latitude™ D420 User's Guide
Dell Technical Update Service | Memory Problems |
Dell Diagnostics | Network Problems |
Dell Support Utility | PC Card or ExpressCard Problems |
Drive Problems | Power Problems |
Printer Problems | |
Error Messages | Scanner Problems |
IEEE 1394 Device Problems | Sound and Speaker Problems |
Keyboard Problems | Touch Pad or Mouse Problems |
Lockups and Software Problems | Video and Display Problems |
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Dell Technical Update Service
The Dell Technical Update service provides proactive
To enroll for the Dell Technical Update service, go to support.dell.com/technicalupdate.
Dell Diagnostics
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
When to Use the Dell Diagnostics
If you experience a problem with your computer, perform the checks in Lockups and Software Problems and run the Dell Diagnostics before you contact Dell for technical assistance.
It is recommended that you print these procedures before you begin.
NOTICE: The Dell Diagnostics works only on Dell™ computers.
NOTE: The Drivers and Utilities CD is optional and may not ship with your computer.
Start the Dell Diagnostics from either your hard drive or from the optional Drivers and Utilities CD (also known as the ResourceCD).
Starting the Dell Diagnostics From Your Hard Drive
The Dell Diagnostics is located on a hidden diagnostic utility partition on your hard drive.
NOTE: If your computer cannot display a screen image, contact Dell (see Contacting Dell).
1.Shut down the computer.
2.If the computer is connected to a docking device (docked), undock it. See the documentation that came with your docking device for instructions.
3.Connect the computer to an electrical outlet.
4.The Dell Diagnostics can be started in one of two ways:
•Turn on the computer. When the DELL™ logo appears, press <F12> immediately. Select Diagnostics from the boot menu and press <Enter>.
NOTE: If you wait too long and the operating system logo appears, continue to wait until you see the Microsoft® Windows® desktop. Then shut down your computer and try again.
•Press and hold the <Fn> key while powering the computer on.
NOTE: If you see a message stating that no diagnostics utility partition has been found, run the Dell Diagnostics from the optional Drivers and Utilities CD.
