03-15-2017 12:52 AM
Welcome to Lenovo Community! And happy to have you here.
As I understand that you are facing issue that you are not able to adjust screen brightness in your Yoga 500 15IDB
It seems that Intel Display/VGA driver is missing update it from here
Do let us know how it goes.
Please feel free to post in Lenovo Community Forums if you have any further queries!
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