What should do if brightness not increase from lowest value to another?


HOW TO INCREASE THE BRIGHTNESS IF FUNCTION KEY IS NOT WORKING OF LENOVO LAPTOPS OF THE WINDOWS 8OS?


This problem may find you in Z series laptop that brightness set to lowest one and can’t increase further.
Friends this may cause due to following reasons
1.Due connecting charger to bad  source.
2.May due to update windows 8 to 8.1(which cause missing of drivers intel 4000 graphics )
SOLUTION:
1.Turn off  your laptop and click 5 to 6 sec  key  which is outside to the  AC .Then start with Bios(Hope it work if not refer 2)
2.Click on right click on battery icon and select the power option and then change plan setting of your battery plan .And then select theadvanced setting then go to the display and turn on plug in and battery .(If not work refer 3)
3.If this two option not work then your drivers maybe corrupted so download this driver.
http://download.lenovo.com/consumer/mobiles/1hvh13w8.exe

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