Troubleshooting Light Leakage or Light Bleeding on a Dell Monitor

Identifying a light issue with your Monitor

Light leak or backlight bleeding is often noticeable around the edges or the sides of a monitor screen. Especially while it is displaying a dark background or is in a dark environment.

Ideally, light leakage must not be inspected in a dark room. All Dell monitors are inspected as per industry standard with 150-Lux ambient lighting (similar to typical office lighting). However, for gaming monitors, ambient lighting is 70 Lux. Any visual inspection must be done in the same manner to help with the troubleshooting process.

Before proceeding to the troubleshooting section of this article, you must identify the issue that you are experiencing. Identify the light leak or light bleed issue using the examples below and ensure that this is the correct article for you.

If not, see the links to related information in the section below to find other helpful resources.

These issues can be seen on LCD Monitor screens:

Standard Displays

• The light leaks from the corners of the monitor screen in the example image below.
  
• The light leaks from the center of the top and bottom edges of the monitor screen in the example image below.
  
• The entire monitor screen is lit with light from the center of each edge in the example image below.
  
• There are multiple leaks along the bottom edge of the monitor screen in the example image below.
  

Gaming Displays

Some Dell Gaming or Alienware monitors may have some light leakage or backlight bleeding when used in a dark environment. This is NOT specific to Dell Gaming or Alienware monitors but is a common issue that is seen on monitors from any manufacturer. The following image is an example of light leakage.

Dell inspects its gaming monitors for light leakage. It is in an environment with ambient light of 70 Lux according to industry standards (normal ambient light levels in a home are around 150 Lux). If the monitors are used in a dark environment with ambient light less than 70 Lux, some light leakage may be seen.

Twisted Nematic (TN) Panels

Some Dell monitors, such as the Dell D2020H, use a TN panel type. For more information about if your monitor uses a TN panel type, reference the user’s guide for your monitor from Dell Manuals. Light leakage may be seen from TN panels when the panel is viewed at an extreme angle. The example image shows expected light leakage on a TN panel.

This same leakage is not seen when viewing the monitor from directly in front of it. This is working as designed on a TN panel.

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Cause information is not available.

To troubleshoot a light leak or light bleed issue with your Dell monitor:

1. If you change the brightness level of the monitor, does it change what is happening on the screen?

   • If it does, then it could be a settings issue with how you have configured the screen.

   • If it does not, go to the next step.

2. Check the monitor screen with a bright application (such as Microsoft Office) open, something with a bright background. Do you see the same issue? (take an image that you can use to illustrate what the issue looks like to another person.)

   • If you cannot, it could be an issue with the brightness level in your screen settings.

   • If you can, take an image using your mobile phone and go to the next step.

3. Compare the screen to other monitors of the same model. Put a similar image on both monitors (preferably not a dark or mostly black image). Is one screen notably worse than the other?

   • If the screens do not show any appreciable difference, then the issue is more likely to be with your perception than any real technical issue.

   • If the screens do show that your screen is appreciably worse than another similar screen, then contact Dell Technical Support. If possible, provide an image of the fault, so that the Dell technician can further assist you.

Items That Should Be Returned With A Warranty Monitor Replacement.

A list of Dell Gaming or Alienware monitors can be found here: Dell Gaming and Alienware Monitor Frequently Asked Questions

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Recommended Articles

Here are some recommended articles related to this topic that might be of interest to you.

• Dell Gaming and Alienware Monitor Frequently Asked Questions
• Dell Display Pixel Guidelines
• How to Troubleshoot Display or Video Issues on a Dell Monitor
• How to Troubleshoot Touch Screen or Touch Panel Issues
• Desktop Touch Screen Does Not Work After Windows 10 Update
• Troubleshoot a Flickering Screen after a Windows 10 Upgrade

More information and support for your Dell monitor, desktop, laptop, or tablet screen can be found on our Monitor Support site.

Out of warranty? No problem. Browse to the Dell.com/support website and enter your Dell Service Tag and view our offers.