If your HP notebook computer has a backlit keyboard, take a look at the top bar of your keyboard and locate the F5 button. This button may even be labeled with a backlight icon. Simply clicking this button while pressing the Fn button located at the bottom row of your keyboard will leave you with keyboard lighting operational magic.

On most notebooks with a backlit keyboard, you can press the f5 or f4 key on the keyboard to turn the light on or off. It might be necessary to press the fn key at the same time. If the backlight icon is not on the f5 key or f4 key, look for the backlit keyboard key on the row of function keys.