. If that still doesnt. The same problem can occur with the Function Fn key.
How To Enable Function Keys On Dell Laptop Windows 10 Fixed Techy from techyguy.in
Fnf6 current Windows key lockunlock. Hold down the Fn key press F11 or F12 check if the brightness changes through the keys. Think of it like caps lock and the shift key.
I still had to press FN for volume brightness and so on.
If pressing the keys alone does not work you may have to hold the Fn key. Press either the UP arrow key or the RIGHT arrow key to increase brightness. Hold down the Fn key. Your probably FN lock on and pressing FN disables it.
