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Keyboard and Touchpad not working on HP Probook 450 g2


haridhayal
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hello

I have a HP Probook 450 g2 

 

specs-

  •  2.39 Ghz Intel Core i5 5th gen
  • 4GB 1600MHz DDR3 Ram
  • Intel HD Graphics 4400
  • 750GB Hard disk

 

I have installed El capitan

 

from the install screen ,keyboard and touchpad(integrated) are not working

but if i connect an external keyboard and a mouse its working 

audio is also not working even if i connect a headphone

 

Please let me know how to fix this

 

thanks in advance

 

 

 

             

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