Pavilion 15-r004ne: cannot adjust the brightness of the display

I m using the Pavilion 15-r004ne on a windows 64-bit OS 8.1 and I cannot adjust the brightness of my screen. I tried to adjust by shortcut keys F2 and F3, tried adjusting via the mobility Center, tried through Control Panel and so on, but no response until now. It shows the little pop-up when I press the keys. But nothing has changed, the brightness of the display remains the same. in order to get solution soon.

Thank you for your support. It didn't work either. I solved the problem of roll back the driver and update again.

Tags: Notebooks

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