Knowledge Base

Dell LCD Display Pixel Guidelines


Table of Contents:

  1. LCD Display Pixel Guidelines
  2. Pixel/ Dot Grid
  3. Identifying a Bright or Dark Dot (Pixel)

This article provides information on the LCD display pixel guidelines.


LCD Display Pixel Guideline

Each Pixel is made up of a Red, Green and Blue sub-pixel. When a sub-pixel is fixed in an unchanging state, the visible result is a tiny black, white or colored spot that appears on the screen. There are generally two types of sub-pixel defects namely Bright and Dark sub-pixel defects.

A sub-pixel defect is also referred to as a dot defect.

Bright Sub-Pixel defects: A sub-pixel remains permanently lit, resulting in a white or colored dot on a Black background.

Dark Sub-Pixel defects: A sub-pixel remains permanently unlit, resulting in a black or colored dot on a White background.

Premium Panel Guarantee are premium within the industry because they are guaranteed during the term of the Limited Hardware Warranty1 to have zero pixels stuck in the "on" position — a factor that results in a bright dot on the display.

During LCD manufacturing process, it is not uncommon for one or more sub-pixels to become fixed in an unchanging state. A display with 1 to 5 fixed sub-pixel is considered normal and within industry standards.

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Pixel/Dot Grid

Your LCD display is possibly subject to replacement if it meets the criteria outlined in (Table 1).
Only fixed sub-pixels/dots (bright or dark) visible to naked eye at normal viewing distance would be allowed for replacement.

Panel Bright Sub-Pixel Dark Sub-Pixel Total Sub-Pixel

Flat Panel Monitors with Premium Panel Guarantee
  • Dell UltraSharp Monitors(U, UP, UZ series)
  • Dell Professional Monitors (P series)
  • Alienware OptX Monitors (AW series)
1 or more 6 or more Bright = 1 or more
Dark = 6 or more
Dell Monitors (D Series) 6 ore more 9 ore more Combination of Bright and Dark = 9 or more
All Other Dell Monitors 6 or more 6 or more Combination of Bright and Dark = 6 or more

Laptop LCD screens with standard panels on :
  • Dell Inspiron laptops
  • Dell Latitude laptops
  • Dell Precision Mobile Workstations
  • Dell Studio laptops
  • Dell Vostro laptops
  • Dell XPS laptops
  • Alienware laptops

for either (HD, SXGA, WSVGA, WXGA) LCD resolution
3 or more 6 or more Combination of Bright and Dark = 6 or more

Laptop LCD screens with Premium Panel Guarantee on :
  • Dell Inspiron laptops
  • Dell Latitude laptops
  • Dell Precision Mobile Workstations
  • Dell Studio laptops
  • Dell Vostro laptops
  • Dell XPS laptops
  • Alienware laptops

for either (FHD, HD+, WSXGA, WSXGA+, WXGA+, WUXGA) LCD resolution
1 or more 6 or more Bright = 1 or more
Dark = 6 or more

Laptop LCD screens with Premium Panel Guarantee on :
  • Dell Latitude ATG Laptops
  • Dell Latitude XFR Laptops
1 or more 6 or more Bright = 1 or more
Dark = 6 or more

Table 1: LCD Policy Table

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Identifying a Bright or Dark Dot (Pixel)

Identifying a Bright Dot (Pixel)

  1. Power off both your computer and the monitor.
  2. Unplug the video cable from the monitor.
  3. Clean the screen with a lint free cloth as dust may be the "spot" which is seen.
  4. Ensure the power cable is plugged in to the monitor.
  5. Power on the monitor.
  6. A floating box on a black background should now appear.
  7. Check the screen for bright pixels. These pixels are usually lit resulting in a White or Colored (Red, Green or Blue) dot on a Black background.
    Alternatively, you could also run the Monitor / LCD Built-in Self Test by following our How to Run the Built-In Diagnostics for you Desktop Monitor or How to Run the LCD Built-in Self Test for Laptops.
  8. Notice Bright dot or bright pixels or any other distortion on the screen.
  9. Contact Dell Technical Support if you notice any defects.

Identifying a Dark Dot (Pixel)

  1. Power off both your computer and the monitor.
  2. Unplug the video cable from the monitor.
  3. Clean the screen with a lint free cloth as dust may be the "spot" which is seen.
  4. Ensure the power cable is plugged in to the monitor.
  5. Power on the monitor.
  6. Run the Monitor / LCD Built-in Self Test by following our How to Run the Built-In Diagnostics for you Desktop Monitor or How to Run the LCD Built-in Self Test for Laptops.
  7. The screen should now alternate between multiple colors (White, Red, Green, Blue and Black).
  8. Notice the dark dot or dark pixel or any other distortion on the screen.
  9. Contact Dell Technical Support if you notice any defects.
Your Limited Hardware Warranty covers your monitor against defective parts and workmanship. If you experience a part failure during your Limited Hardware Warranty period, we'll first troubleshoot the unit with you. If your issue is identified as a bright or dark pixel after troubleshooting, Dell will ship you a replacement unit depending on the status of the Limited Hardware Warranty of the affected unit.

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Article ID: SLN130145

Last Date Modified: 05/25/2015 12:41 PM


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