Dell Latitude D820: Dell Diagnostics

Dell Diagnostics: Dell Latitude D820

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Quick Reference Guide

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" on page 18 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 

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.

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 invoked 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

.

The computer runs the Pre-boot System Assessment, a series of initial tests of your system board, 

keyboard, hard drive, and display.

During the assessment, answer any questions that appear.

If a failure is detected, the computer stops and beeps. To stop the assessment and restart the 

computer, press <Esc>; to continue to the next test, press <y>; to retest the component that 

failed, press <r>. 

If the Pre-boot System Assessment completes successfully, you receive the message 

Booting 

Dell Diagnostic Utility Partition. Press any key to continue

.

5

Press any key to start the Dell Diagnostics from the diagnostics utility partition on your hard drive.