Sometimes it is possible that your laptop may have automatically backlit which is why it may not be turning on with your key commands because the light or environment around isn’t suitable for it to take the effect. Lenovo later started to include backlit keyboards, and some models. You can use a flexible USB lamp that can illuminate the keyboard for you. ThinkLight was a keyboard light present on many older ThinkPad families of notebook. Lenovo ThinkPad 14-Inch Laptop with Backlit Keyboard 2.
If your laptop doesn’t have a backlit keyboard, then there is an alternative that you can try. Best Laptops with a Backlit Keyboard for Seamless Typing in Darkness 1. There are three modes for the backlit Off, Low, High that can be changed by pressing Fn + Spacebarevery time.Try it by pressing them together and see if it works. Usually the backlit works with Fn + Spacebarkey from the keyboard.If there is no light icon present on the keyboard or on the Space button, it indicates that your system laptop is not supported with a backlit.This key is for showing an illuminated keyboard that means you can turn the light of the keyboard on or off with that key.First, you can check the manual of the Lenovo laptop that will show you where you can find backlit key function, if there is not, then you can search for a bulb or any light ray icon button on your keyboard.There is a simple procedure that you can try in case you want to turn the backlit keyboard on or off on your Lenovo laptop.