If you have “Lower screen brightness when using battery saver” turned on, you cannot change the brightness level when in power-saving mode. (Icons on these drivers are slightly faded.) Right-click and uninstall all these drivers.If you have any hidden devices, they will appear under Generic PnP Monitors. Since the battery is attached to your laptop, there will always be some current running inside it, even when you shut it down. This small amount of charge holds some data in the capacitors inside your laptops. These small data can be the stopping you from adjusting the brightness. Removing the battery will discharge the capacitors. We can easily remove the battery from some laptops, as the batteries are accessible without opening the insides. Press the power button four to five times before installing the battery to discharge all the capacitors. For these laptops, you can remove the battery for five to ten minutes to fix your brightness issue. Sometimes, just restarting your laptop can solve the issue with the brightness. However, depending on the issue, you might have to restart your laptop multiple times for the problem to fix. If you are trying to change your brightness and nothing works, check if the keyboard works properly. You can try to change the brightness from the taskbar if your keyboard doesn’t work. If you use extensions that help change the brightness level, check if the night mode is turned on. This mode dims the overall brightness and gives your screen a warm tone. Related Question How Do I Turn On Fn Keys for Brightness? So, make sure you have disabled the extension to increase the brightness. You can press Fn and function keys, on the top of the keyboard, with the brightness sign (this will look like a sun/bulb) to adjust your brightness level. Instead of the function keys, the up/down arrow key may also work. a small light may turn on, showing that the Fn key is locked Why Is My Brightness Slider Missing? To lock your Fn key, you can press Shift + Fn. If the laptop turns off during a driver update, the files might get corrupted. These corrupted files in your driver are the reason your brightness slider is missing.Is your Notebook’s screen brightness not adjusting properly even when you try moving the Brightness Slider? Don’t you worry! In this guide you find invaluable insights on how to fix the “ Windows 10 brightness not working”problem.
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