Click the Scan for hardware changes button at the top.If the device is already enabled, select Disable device.Right-click the PnP monitor device and select Enable device.It may need to be enabled before you can control it’s brightness with built-in Windows 10 settings. Disable/uncheck the Change brightness automatically when lighting changes option.Īn external monitor appears as a PnP (plug & play) display device.Open the Settings app with the Win+I keyboard shortcut.It may interfere with the brightness slider. Windows 10 uses this sensor and automatically adjusts the brightness of the screen so that it is suitable for the amount of light in the room.
Laptops have a sensor that can detect the amount of light in the room. Search online for available drivers and install the ones that are available.Right-click the on-board graphics card and select Update Drivers.If your display driver is outdated, and you’re running a newer version of Windows 10, the brightness slider/controls may not work. Select the app and click the Uninstall button at the top.They may be interfering with native Windows 10 controls. apps that claim to to increase the FPS in a game, or apps that manage display settings, quit or uninstall them. If you’ve installed third-party apps for managing the video settings on your system e.g. If you’re unable to change the brightness with the above two methods, try the fixes below. Use the brightness slider to change the screen’s brightness. Open Control Panel and go to Power Options.Use the dedicated keys on the keyboard to change the brightness.If the brightness slider on Windows 10 is not working, try the following first for internal screens or the main monitor connected to a desktop system.įix Windows 10 brightness slider not working The brightness slider is also controlled by dedicated keys on the keyboard and they work the same way as the slider does i.e.
It normally does not work with external monitors that are connected to a laptop. It can change the brightness of the internal display of a laptop, and the monitor for a desktop. Windows 10 has a brightness slider that you can access from the Control Panel and from the Action Center.
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