05-21-2015 06:05 AM
This also helped in my case, but I received a message saying that there is a newer driver version already and if I wanted to override this- I said yes. I'm not really happy with the Lenovo product and will go back to HP
10-02-2015 05:19 PM
This is the greatest trick. I adjusted the brightness when "LENOVO" was shining on the screen during restart and it worked. Though the brightness control is not working, it helped me gain the brightness back.
Thank you very much.
11-10-2015 01:00 PM - edited 11-10-2015 01:02 PM
I just used this patch to fix my P400 Touch and it worked on the screen brightness adjustment being restored and I am using Windows10. Even though the patch reads for Windows8, it worked perfectly for me.
Thank you so much, I was about to throw my computer until I found this forum!
11-29-2015 06:35 AM
This happened to me and I almost went to K-Mart to ship my pants.
There is a key combination that will make the screen go dim. I was in Internet Explorer and was using the CTRL + and - to adjust the zoom and CTRL 0 to return to normal. I think I hit some key combination and the screen went dim to almost dark. I can't reproduce the problem.
It took me a day and a half to figure out a solution without having to update software.
Here is a solution in case the drivers and/or the OS gets in the way again of adjusting the brightness. It is a pain and requires a reboot which removes the buggy software interfering with the brightness keys which allows you to make it brighter. I had to do it a couple of times due to hitting the key at the right time. Maybe going into BIOS would give you more time. I did not try that.
What I did was reboot and when I saw the Lenovo logo on boot up I hit the brightness key and watched the screen get brighter. When I saw that I almost had to go back to K-Mart because I could not believe how easy that was.
I still don't have brightness control, but I'm no longer having to squint my eyes to look at the screen or work in the dark. I'm going to get the drivers to see if that will fix the keys.
YOU ARE A HERO AMONG MEN