how to change screen brightness?

February 12, 2015 at 00:12:40
Specs: Windows 7
when i try the normal way it tells unavailable on this display.what should i do?i am also not able to change the screen resolution.only two options are there for me either full high or minimum resolution on this display.

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February 12, 2015 at 06:41:39
Laptop or desktop? Please post the models & model numbers.

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