Press the F5, F9, or F11 key to turn your HP laptop keyboard light on or off. Some HP laptops need the Fn key pressed with the light key to activate the keyboard light. If these keys don't work ...

The Fn Lock key's exact placement may vary depending on your laptop model, but it's typically found at the bottom left of the keyboard or in the function keys row.

How to Turn Off the F-Lock on a Gateway Laptop. On some computers, the function keys -- the 12 "F" keys at the top of the keyboard -- have built-in secondary functions, like changing speaker ...