Z500 Windows 8.1 light problems

Last day I updated my laptop for windows 8.1 and I had pressed the F11 key to decrease the brightness of the screen, and suddenly, the brightness is down to the minimum level. By pressing the F12 key, it doesn't. Kindly help me how to restore the brightness of the screen?

Dear ElbinZacharia,

Please contact Lenovo.

Please notify all the function keys work or not.

Pack the funcation keys do not work, so I recommend you to uninstall the application of energy management:

Go to the control panel > programs > uninstall a program > click with the right button on management of energy > uninstall.

Next, you'll need to reinstall it using the link below.

http://support.Lenovo.com/us/en/products/laptops-and-netbooks/IdeaPad-z-series-laptops/IdeaPad-Z500-...

Waiting for your kind response.

Tags: Lenovo Notebooks

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