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The First method is to Press “Alt + F10” which will turn on Backlit option in Dell Laptop keyboards. The Second method is Press “Fn + Right Arrow” or “Fn + F10” which will turn on the Backlit option. You can also toggle between three lighting modes like – Full keyboard, Half keyboard and Keyboard Backlit Off which are available in some laptops.How do I Turn on keypad light?
Press the key that has the backlit keyboard icon—three dots in a horizontal row with three lines that look like light rays shooting out of the corner of the left dot. The key may not serve any other function or may also double as the "F5" or "F12" key.How do you Turn Off Keyboard light on HP laptop?
Press the appropriate key to turn the keyboard light on or off, or to increase or decrease its brightness. On HP keyboards, this is all you have to do. If this doesn't work, hold down the "Fn" key and press the illumination control key again. This key combination is common on Samsung and Asus notebooks.