wathou6 Posted August 30, 2014 Share Posted August 30, 2014 Has anyone been able to fix this problem where the brightness setting keys don't work and neither does Windows 8.1's Brightness control on the right side?I would like to know how anybody has fixed it before I attempt to do a full reinstallation of Windows 8.1 to see if it works again? Quote Link to comment Share on other sites More sharing options...
Moderator angerthosenear Posted August 30, 2014 Moderator Share Posted August 30, 2014 Has anyone been able to fix this problem where the brightness setting keys don't work and neither does Windows 8.1's Brightness control on the right side?I would like to know how anybody has fixed it before I attempt to do a full reinstallation of Windows 8.1 to see if it works again?Yes! This happens on computer very very randomly. And no, you don't have to re-install.To fix::Open Device ManagerExpand the 'Monitors' sectionRight click your displayClick uninstallRebootTada! Quote Link to comment Share on other sites More sharing options...
raven2345 Posted September 11, 2014 Share Posted September 11, 2014 I'm not sure if this will be of much help, but when I first got my Y400, the screen was super dim, looked like it was on the lowest brightness setting, to where I really couldn't even see the laptop was on. Turned out, sure enough, the backlight or whatever you want to call it for the screen was damaged upon arrival. Just something to take into consideration if your screen is extremely dim. Quote Link to comment Share on other sites More sharing options...
therealk3ks Posted November 16, 2014 Share Posted November 16, 2014 I got the same problem on my Y510P but only after some time and I have to reboot in order to have the brightness control working again.Any ideas how to solve this problem, cause I hate rebboting that often.P.S.: Sorry for my bad English. ^^'' Quote Link to comment Share on other sites More sharing options...
bob1122 Posted November 19, 2014 Share Posted November 19, 2014 Has anyone been able to fix this problem where the brightness setting keys don't work and neither does Windows 8.1's Brightness control on the right side?I would like to know how anybody has fixed it before I attempt to do a full reinstallation of Windows 8.1 to see if it works again?If angerthosenear thoughts don't worry try these two optiionsA thought.... 1, unistall both your 4700mq and 750m drivers , then reinstall the originals from Laptops and netbooks :: IdeaPad Y Series laptops :: IdeaPad Y510p Notebook - Lenovo Support (US)after that reboot and update the drivers. I had this issue for quite a while (however I was running archlinux at the time!) Quote Link to comment Share on other sites More sharing options...
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