Lenovo laptop not working

[DaAlex]

My Lenovo Flex 3's keyboard suddenly stopped powering up. I have a back lit keyboard and when I tried rebooting it; the keyboard does not light up.
Laptop is a Lenovo Flex 3 15

 

[Acesis]

I found this post on another site: "Your sticky keys are turned on...turn them off
control panel --> Accessibility Options --> turn sticky keys off"

Worth a shot

 

[Prostar Computer]

Does the keyboard still respond to input?