This is how you turn on your backlight keyboard in a lenovo Thinkpad laptop.Press the Fn key(located at the bottom left of the keyboard) and the Space bar key simultaneously .This will toggle the backlight on or off.The backlight function is a physical switch and doesn’t require a drivers support . The backlight keyboard is an essential feature on a laptop that comes in handy at night when using a laptop.. #lenovo thinkpad | Mashtech Computers