09-24-2017 12:11 PM
My Keyboard backlight on Lenovo Yoga 900-13ISK does not light up even I did turned on it.
I can switch it to turn OFF or ON by pressing Fn + Spacebar.
Previously, It was working, but suddently It does not light up even status is ON.
09-25-2017 08:31 AM
Welcome to the Community Forums.
Try to check if the keyboard backlight would turn on and off pressing FN + space while in the BIOS.
If it still fails to enable then it would be best to call in technical support for in warranty repair.
Hope this helps answer your query.
Update us how it goes.