Knowledge Base

How to Run the LCD Built-in Diagnostics - KB Article - 272002

Article Summary: This article provides information on how to run the Pre-boot System Assessment (PSA) diagnostics and the Built-in Self Test (BIST) for the LCD.

Table of Contents:
  1. How to Run the PSA Diagnostics
  2. How to Initialize the BIST Diagnostics

Issue 1.

How to Run the PSA Diagnostics

To run the Pre-boot System Assessment (PSA) diagnostics and obtain the PSA error code, perform the following steps:
  1. Shutdown the computer.

  2. Press and hold the <Fn> key, then press and release the power button.
    Release the <Fn> key when the lock lights above the keyboard begin to flash or Diagnostic boot selected is displayed in the upper right corner of the screen.

  3. Release the <Fn> key.
    • The PSA diagnostics sequence begins.
    • After approximately 2 minutes the system produces a number of alert tones.
    • After the alert tones, the system produces either a series of low beeps or error codes.


    PSA diagnostics will prompt for input during some tests. The resulting error message does not necessarily indicate hardware failure.
    For example, input is required during the color bar test. Failure to input a response will eventually result in a timeout error: 1000-0333 Graphics test timed out waiting for keyboard response. This does not indicate a graphics failure has occurred.

  4. Note the sequence of beeps or error codes.

Issue 2.

How to Initialize the BIST Diagnostics

To run the LCD BIST (Built in Self-test) Press and hold the D key on the keyboard while pressing the power button, then release both at the same time.

This will initiate A grey screen, then Red, then Blue, then Green then White, to allow you to inspect the entire LCD for color purity on each screen and to better identify defect such as cracks in the LCD or stuck pixels that may not be apparent in a normal viewing mode.

Systems built after mid-year 2012 may also display a white screen with black text to help identify focus/clarity issues.


Quick Tips content is self-published by the Dell Support Professionals who resolve issues daily. In order to achieve a speedy publication, Quick Tips may represent only partial solutions or work-arounds that are still in development or pending further proof of successfully resolving an issue. As such Quick Tips have not been reviewed, validated or approved by Dell and should be used with appropriate caution. Dell shall not be liable for any loss, including but not limited to loss of data, loss of profit or loss of revenue, which customers may incur by following any procedure or advice set out in the Quick Tips.

Article ID: SLN131497

Last Date Modified: 08/03/2012 12:00 AM

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