the brightness controls buttons are not working on my HP Dm3t notebook with windows xp, any suggetio

Posted by Karim on Super User See other posts from Super User or by Karim
Published on 2010-03-24T01:12:18Z Indexed on 2010/03/24 1:13 UTC
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windows-xp

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hp

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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