Windows 10: Not able to brighten the screen with hot keys

As of lately, while pressing shortcuts Fn+F5 and Fn+F6 the screen gets only darker on my Lenovo Legion Y540-15IRH on Windows 10. Normally, Fn+F5 darkens the screen, while Fn+F6 brightens it. After clicking this combination by habit too many times, the screen turns black and the only way to restore the screen's brightness is to restart the system.How to fix it?

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hot keys to lower or brighten the screen

a while back i updated to windows 10, ever since that happened i was no longer able to use the hot keys/ functions on my samsung laptop to brighten the screen or make it less bright. in my computer i would have to use the key Fn and then use the up arrow
to brighten the screen or if i wanted to make it less bright i would have to use the Fn key and the use the down arrow. is there a way i can fix it and have the access to those functions again?

 

When playing games the hot keys are active

Hi Chris,

Thank you for your interest in Windows 10.

I suggest you to follow the steps below to disable Hot Keys and check if that helps.

• 
  Right click anywhere on your desktop screen and select Graphics Options.
  
• 
  Navigate to Hot Keys and then click on Disable.
  
• 
  Check if issue persists.
  

Hope this information is helpful. Please do let us know if you need further assistance, we’ll be glad to assist you.

 

brighten screen

I am trying to brighten my screen but for some reason when I go to the display screen it doesn't give me the option to brighten my screen only to turn the nightlight on or off but even when I click on it nothing changes.