Solved! Lenovo Z500 - Cannot adjust brightness in Windows 10, need fast help..

Nov 19, 2018
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Hello,

Laptop which is facing the problem, is Lenovo Z500.

Windows 10.

A problem that is known, but I can not deal with it.

I installed 5 different drivers for the integrated graphics card, changed the parameter in the register FeatureTestControl parameter to FFFF, I installed various energy management. I changed the HD4000 driver to the basic one from Microsoft.

Nothing helps - when clicking the dash / dimming, a bar appears, which moves as it should, but the screen is still the same dark.

As I enter the settings -> screen, and there I set the slider, strange things happen, the screen goes self-darkening, dims itself, literally as if the laptop had a light intensity sensor ..

The BIOS can be used to light up the screen, it shines as it should, it does not get dark, etc. The matrix is okay.

Anyone have any suggestions on what you can do here?

Actually, for me, brightness can be 100% all the time, but the way with FFFF in the registry does not help.
 
Nov 15, 2018
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Hello,

I don't know exactly, but i can help you
I am sharing a few steps try it,
i hope these steps solved your problem.
Steps:
1. Go to control panel,
Search for device manager, click it
2.click on monitor under device manager.
3. under monitor click on generic PnP Monitor.
Now restart and check.
 
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