Make sure the current isn’t fluctuating.Make sure the laptop is securely plugged in.Power plans can change based on the source of power (battery or DC). If your system isn’t getting a steady current, it may be triggering a change in the power plan. Run the Power troubleshooter and apply all fixes it recommends.Ĥ.In the column on the left, click View All.Use the dropdown at the top right to change the view to Small icons.Windows 10 has a troubleshooter for power related problems on the system e.g., a system component is unable to draw as much power as it needs in order to function.
Search online for driver updates and install updates that are available. Right-click the on-board graphics card and select Update driver. Updating drivers to the latest version should fic the problem. While uncommon, outdated graphics drivers can cause the screen to dim or brighten. Repeat this for all power plans you use. Turn it off for both battery and plugged in states. Expand Enable adaptive brightness under it. Click C hange plan settings next to your current power plan. This feature is called adaptive brightness and it may be responsible for the screen dimming or brighnting. If the light changes, or the sensors thinks it’s changed, it will adjust the brightness of the screen to suit the level of light. Laptops often come with sensors that will check the ambient light in a room. Hardware problems are likely going to require that you take the laptop in for repairs but software problems can be solved by trying the fixes listed below. If your laptop’s screen keeps dimming or brightening, it may point to a software problem or a hardware problem. Regardless of how you change the brightness of the screen, it will remain set at a level until you choose to change it again. All three will change the same setting and are essentially different ways to doing it. Depending on how you have your work station set up, and how much light is in the room, a user is free to choose how bright the screen is, and to change it whenever they need to.īrightness can be changed from a keyboard, buttons on a monitor, and from settings provided by the operating system that is installed on a system. The brightness of a screen will span a certain level ranging from very dim to exceptionally bright. 
All screens have a backlight which determines how bright or dim they are.
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