07-13-2014 08:24 AM
This is the message that I'm seeing when trying to resolve the problem. I have a z400 and I'm having a problem with the screen light button. I'm no tech savy so I do not know other ways to resolve it.
09-04-2014 06:44 PM
Thank you, Thank you!!! I have been trying all different suggestions to try and fix my screen brightness. Yours worked!
Thank you for your time in putting your post together
09-14-2014 09:58 AM
Thanks to everyone
Problem was fixed.
we can download drivers from this link and install.
Problem will be fixed.
Thanks again. Feeling relaxed
11-20-2014 03:37 PM - edited 11-20-2014 03:39 PM
All these complicated suggestions and instructions and this one WORKED!!!! Thanks!
Press the F12 key at start up.
Try this trick out! I got my screen brightness back up by completely shutting down my laptop. Boot it back up and as the Lenovo start up screen appears press the F12 key. It raised mine back up.
11-25-2014 12:17 AM
I tried following your instruction but the problem is I can't use the 'roll back driver' button. What should I do? I really hope that you can help me fix my problem because with this lowest brightness, I can't use my laptop.
05-18-2015 08:27 PM
I have tried the start plus r method and i went through all the steps but when i got to the Select roll back step that was not an option for me. Is there any other method i could try? I really need my brightness fixed. My brightness stays the same whenever i try to make it brghter or anything. ALso, my keyboard lights are out. Can any one help?
I recently had to replace my harddrive and now i am having all these problems.