Lenovo ideapad z500 W8 screen

Hello, I have a problem with my screen.
It is dark, but I wear f11 and f12 brightness does not increase or decrease.
I don't know what is happening
Can you help me?
use of windows 8

Is the condition exists when you have your computer first or later?

Found this link that relates to your problem.

Tags: Lenovo Notebooks

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