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farbod1372 Honor Student
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the buttons of low and high brightness donot work

ProBook 4530s
Microsoft Windows 10 (64-bit)

hi

when I Push fn+f2 or fn+f3 buttons, brightness of monitor doesnot low or high. and all of my drivers installed. my display drivers in device manager are AMD Radeon HD 7400M Series and Intel(R) HD Graphics 3000. all of these installed.

please help me

thanks a lot

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