So, I do not know what precisely I did however rapidly I could not hear sound by means of my headphones. I had checked if the quantity nonetheless works and it does. It seems the quantity on my headphones was mute however that did not repair my downside as when i pushed the rise quantity button on the keyboard a facet popped up that appears like legend or code or one thing. Not one of the high row buttons work correctly. Brightness does not do something. I imply when i press it the brightness does not go up or down. After I press lower quantity the display is goes to love that space the place it reveals you your desktops and open home windows. I need assistance please.

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