05-03-2018 11:12 PM
I just received a second-hand T550 and it is a great machine, with one problem: I cannot change the screen brightness. I have done a clean reinstall of Windows 10 and let Lenovo System update download all the drivers, but I cannot change the brightness anywhere. Not with the Fn keys, not in the notification center, and it doesn't even show up in the power options. Where on my other laptops there are options for turn off display, put computer to sleep and brightness, on my new T550 the brightness option is non-existent.
I have installed the latest:
And still, it is not working. Does anyone have a suggestion for me?
05-03-2018 11:16 PM
It means someone changed the LCD to a non-Lenovo panel. The edid (configuration chip) has the wrong information.
05-04-2018 10:26 PM
My experience has been that the Lenovo ones have the panel id changed. Lenovo or Len in the name.
I don't have a T550 to check.