How to solve screen brightness problem of Lenovo Ideapad Z400?

In this post, I'll show you how to solve screen brightness problem of Lenovo Ideapad Z400.

Image: Lenovo Ideapad Z400 screen problem

I am using Windows 8.1 64 bit on Ideapad Z400. My screen is very dim and will not let me adjust brightness. I can't adjust or change my screen brightness with the hotkey (F11 and F12) or even with the slider in settings. It happens after updating from Windows 8 to WIndows 8.1.

In order to solve the problem, you need to download and install the drivers stated below.


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