Hp pro 4300 all in one pc - the brightness increase/decrease button to adjust the screen

Dear all ,
I have bought a new PC, It's Hp Pro 4300 all in one PC. I already installed all driver which public on Hp website correctly. However I can not use the brightness increase/decrease button .
Could you please help me to solve this problem?
thank you very much and look forward to hearing from you.

Hello novacom,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand you are having issues with you Hp Pro 4300 and adjusting the screen brightness using the button on your keyboard. I am sorry, but to get your issue more exposure, I would suggest posting it in the commercial forums, since this is a commercial product. You can do this at Business PCs - Compaq, Elite, Pro.
I hope this helps. Thank you for posting on the HP Forums. Have a great day!
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Click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution!

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I am not an employee of HP, I am a volunteer posting here on my own time.
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R a i n b o w 7000I work on behalf of HP
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If my post resolved your problem, please mark it as an Accepted Solution ...
I worked for HP but now I'm retired!

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Hp pro 4300 all in one pc - the brightness increase/decrease button to adjust the screen

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