Then, type “ powercfg.cpl” and hit Enter to open the Power Options menu. Press Windows key + R to open a Run box.
Here’s a quick guide to fixing the brightness issue via Power options:
Note: This particular method can also be applied to Windows 7 and Windows 8 to fix the brightness issue. Although this bug is as old as Windows 7, Microsoft has failed to address it as of now. Most of the time, the issue is the result of a classic case of brightness settings bug that can be resolved by tweaking some power options settings. Method 1: Adjusting the brightness from Power Options Follow the methods below in order until you discover a fix that manages to resolve your issue.
We have managed to identify a number of potential fixes that have been effective for other users encountering the same situation. If you’re struggling with this issue, the following methods will help.