Laptop screen dimming or brightening? Try these things to fix it


Milan Stanojevic
by Milan Stanojevic
Deputy Editor
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Laptop screen randomly lighting

Most computer users may have experienced laptop screen issues at one time or another, sometimes with screens that may have lines, go blank, or bring up blue and/or black screen errors.

Other times, though, it could be an issue with the lighting. Another problem occurs when a screen dims and brightens by itself, randomly. Something like this can happen due to corrupt display drivers on your computer, and not necessarily because of a faulty battery.

Before using any of the solutions below, check the following things:

  • The make and model of your laptop
  • Whether you made any software or hardware changes prior to the laptop screen issue

This is important to note because laptop screen dimming/brightening issues may occur if power settings are corrupt or incorrect.

In case your laptop issues persist, we created a list of several solutions that can easily help you solve the screen problem:

  1. Use Power troubleshooter
  2. Check your laptop screen display settings
  3. Update display card drivers
  4. Update latest ACPI drivers

How to fix screen dim and brightens issues on laptops

1. Use Power troubleshooter

To run the Power troubleshooter, take the steps below:

  • Right-click Start
  • Select Control Panel
  • Go to the top right corner and change View by option to Large icons
  • Click Troubleshooting
  • Click on View all option on the left panel
  • Click on Power
  • Follow the prompts to run the Power troubleshooter

 

If the laptop screen dimming and brightening issue persists, try the next solution.


2. Check your laptop screen display settings

This involves adjusting your laptop screen display settings in order to get the best display on your monitor.

Here’s how to do it:

  • Right-click Start
  • Select Control Panel
  • Go to Appearance and Personalizationappearance and personalization control panel
  • Click Adjust screen resolution
  • Go to Resolution and click the drop-down arrowlaptop screen
  • You’ll see the resolution marked Recommended. This is the one suitable for your laptop screen’s native resolution, the highest your monitor can support.

You can set brightness and contrast from monitor controls. For a laptop screen, these are adjusted within Windows under Power Options.

How to adjust laptop screen on Power Options

  • Right-click Start
  • Select Control Panel
  • Go to the top right corner and change View by option to Large icons
  • Click Power Options and change your settings.power options control panel

 


3. Update display card drivers

Here’s how to do it:

  • Go to Start > type Device manager > select the first result
  • If prompted for administrator permissions and/or password, enter your password and click Continue
  • Go to Display Adapters
  • Double click your Display adapter entry
  • Click Update Driver softwareupdate driver software device manager
  • Follow the wizard to update the display adapters driver

ALSO READ: Screen flickering: What causes it and how to fix it on your laptop


4. Update latest ACPI drivers

This is done from your device’s manufacturer website.

It is recommended that you download a fresh copy of the driver first, then remove the current one and install the latest copy.

If a device isn’t working, find the driver for the device, then find the update using these two ways:

  • Visit the manufacturer’s website and download the driver
  • Go to the device maker’s site to find the driver

If you don’t know the name of the driver, check Device Manager then find the device that isn’t working. Right-click on the device, open Properties, and select details. Use the pull-down list to find the hardware identity (IDs). Copy the short string and search for it on Google.

find device manufacturer

When you find and download the driver, remove the current one, then uninstall it completely.

Install the fresh copy of the driver once you remove the old one.

Always keep ahead with updating your outdated drivers for your computer to work properly. Download TweakBit’s Driver Updater Tool (approved by Microsoft and Norton) to do it automatically and prevent the risk of downloading and installing the wrong driver versions.

Disclaimer: some functions of this tool are not free.

Please let us know if our solutions worked for you.
Also, in case you have other ways of solving the screen issue, do not hesitate to let us know about them in the comment section below!

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Editor’s Note: This post was originally published in October 2017 and has been since updated for freshness, and accuracy.