Brightness Controls not working on HP Dm3t

Posted by Karim on Super User See other posts from Super User or by Karim
Published on 2010-03-24T01:12:18Z Indexed on 2012/03/24 17:32 UTC
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windows-xp

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laptop

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hp

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brightness

i have an HP dm3t notebook which normally comes with windows 7.
after some time i figured out how to install Windows XP on it.
but now i am facing a problem that the brightess controls dont work so i am unable to change the brightess.
the strange thing is that all the other buttons (sound volume, mute, sleep , etc... ) works but not the 2 brightess controls.
i already downloaded the "HP Quick Launch Buttons"
so i am asking about suggesitions how can i enable these two buttons in windows XP or even if i can change the brightess using some kind of software. thanks

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