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Brightness Button not Working? 4 Ways to Fix

It may not work if the brightness control is mapped to different keys

6 min. read

Updated onOctober 4, 2023

updated onOctober 4, 2023

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Key notes

In every computer, the brightness button allows you to control the intensity of the lighting, which is an integral part of the system. Sadly, many users complain about the brightness button not working and being unable to adjust their brightness.

However, this issue has left many users questioning how to fix the brightness button. Or what to do if the brightness control is not working on their computer. Hence, this article will discuss the potential fixes for resolving the issue.

Why is my brightness button not working?

Several factors can cause the brightness button not to work on your computer. Below are some common ones:

Note that the above-listed causes are general and can vary on every device. Regardless, you can still fix the brightness button with the steps in the next section.

How do I fix the brightness button if it’s not working?

We recommend you try these preliminary checks before attempting any advanced troubleshooting steps:

1. Update your graphics and keyboard driver

When you install an update for the graphics driver, it fixes the bugs impeding display functions. Similarly, the keyboard update is also effective.

Check other steps for agraphics driver update on Windows 11if you have any issues.

Outbyte Driver Updater

2. Reinstall the Monitor driver

Uninstalling the problematic drivers will remove the monitor device and other display hardware, causing issues with the system’s brightness adjustments.

3. Install an old version of your graphics driver

It has been confirmed that backdating the graphics driver worked for some users. This is so because it resolves incompatibility and faulty update issues responsible for the brightness button not working.

4. Run the keyboard troubleshooter

The Keyboard Troubleshooter will find and repair underlying issues affecting the keyboard device. You can read more on how to troublemouse and keyboard issueson Windows 11 for more steps.

How do I adjust brightness without the Fn key?

The slider will control the brightness settings rather than using the brightness function keys.

Speaking of which, we have a great guide on how tolock and unlock the function key, so you might want to check it out.

Note that the Adaptive brightness feature relies solely on a lighting sensor not present in all computers. However, it allows your computer to adjust to the surrounding light, reducing eye strain and excess battery usage.

Why is my brightness bar disabled?

Alternatively, we have a comprehensive guide on what to do ifbrightness is not workingon Windows 11.

Likewise, you may be interested in our article about thebrightness slider not workingand how to fix it on your PC.

If you have further questions or suggestions regarding this guide, please drop them in the comments section.

Brightness Button not Working? 4 Ways to Fix#

Why is my brightness button not working?#

How do I fix the brightness button if it’s not working?#

1. Update your graphics and keyboard driver#

Outbyte Driver Updater#

2. Reinstall the Monitor driver#

3. Install an old version of your graphics driver#

4. Run the keyboard troubleshooter#

How do I adjust brightness without the Fn key?#

Why is my brightness bar disabled?#