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How to Run a Preboot Diagnostic Test on a Dell Computer

Summary: This article provides instructions on how to run hardware diagnostics using preboot diagnostics on a Dell computer.

This article may have been automatically translated. If you have any feedback regarding its quality, please let us know using the form at the bottom of this page.

Article Content


Table of Contents
  1. Diagnostic Quick Test
  2. Advanced Diagnostic Test
  3. Other Resources

Diagnostic Quick Test

  1. Turn on your computer.
  2. At the Dell logo, press the F12 key several times until the One Time Boot Menu appears.
  3. On the boot menu screen, select the Diagnostics option (Figure 1.)
    One Time Boot Menu

    Figure 1: One Time Boot Menu

    The diagnostic quick test begins (Figure 2.)
    Quick test screen
    Figure 2: Diagnostic Quick Test

    NOTE: The mouse and touch screen (if installed) are not active during testing.
    NOTE: To run a diagnostic test on a specific device, press Esc and then select Advanced test on the lower left corner and then follow the steps in the Diagnostic advanced test section.


    Once the quick test completes, the results are shown.

    It will state either:


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Advanced Diagnostic Test

NOTE: The default is that all the tests are selected.
  1. When you want to run a specific test, select to clear the Select all check box and then select the tests you want to run. (Figure 3.)
    advanced test screen
    Figure 3: Advanced Test Screen
    NOTE: The hardware test options may vary depending on the hardware installed on your Dell computer.
    NOTE: To run a thorough test on the hardware, select to check the Thorough mode box.
  2. Select RUN TEST.
    NOTE: On Dell laptops, user response is required during the LCD test.

    Once the test completes, the results are shown.

    It will state either:


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Other Resources:

The Preboot Diagnostic tool also provides information as outlined below:


NOTE: To access the Configuration tab, select SYSTEM INFO from the options on the left.
Figure 4: Configuration Tab

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NOTE: To access the Health tab, select SYSTEM INFO from the options on the left.
Figure 5: Health Tab

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NOTE: To access the Firmware tab, select SYSTEM INFO from the options on the left.
Figure 6: Firmware Tab

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Logs of Previous Diagnostics Tests

NOTE: To access the logs of the previous diagnostics tests, select LOGS from the options on the left.
Diagnostics logs
Figure 7: Diagnostics Logs Tab

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How to Run a Preboot Diagnostics on a Dell Computer

Watch this video to learn how to use integrated preboot diagnostics to identify hardware issues on your Dell computer.

Duration: 01:34 (mm:ss)
When available, closed caption (subtitles) language settings can be chosen using the Settings or CC icon on this video player.

Additional Information

Article Properties

Affected Product

Alienware, Inspiron, Legacy Desktop Models, OptiPlex, Vostro, XPS, G Series, G Series, Alienware, Inspiron, Latitude, Vostro, XPS, Legacy Laptop Models, Fixed Workstations, Mobile Workstations

Last Published Date

14 Feb 2024



Article Type

How To