Sorry if this is in the wrong category, but I guess it is relating to macbook repairs. Has anyone else had this issue before, and is there any way of actually fixing this? Is it an Apple security feature for a more troublesome repair? Is it just the light sensor on every single screen assembly is faulty - Just putting this out there if anyone has had this similar issue before and if anyone actually knows ways to resolve this? New screen assemblies seem to stop the keyboard backlight from working after logging in - And when I press the backlight brightness up or down on the touchbar, absolutely nothing happens, not even the brightness level icon appears on the screen. As soon as you put the original screen assembly back on and log in, the keyboard backlight is fine. MacBook Pro Core 2 Duo (Late 2006) Keyboard MacBook Pro Mid 2007 Keyboard & Top case MacBook Pro Early & Late 2008 Keyboard & Top case MacBook Pro Early & Mid 2009 Keyboard & Top case MacBook Pro Mid 2010 Keyboard & Top case MacBook Pro 2011 Keyboard & Top case MacBook Pro 2012 Keyboard & Top case MacBook Pro 2013-2014 Keyboard & Top. This has been tested on numerous logic boards with over 10 different screen assemblies from different suppliers.

When we have replaced the screen assembly we've noticed the unit will boot up fine, and at the login screen the Keyboard Backlight is visible, but as soon as you log into the OS and the desktop loads, the keyboard backlight will disappear and never ever appear again until the machine shuts down, and then starts back up (Logging out and back in does not work, the backlight will stay off until shutdown). We have worked on multiple 2019 pros no matter what board number it is, just the 2019 range. First off I know it's a screen assembly issue as me and a colleague have been diagnosing this issue for the past two months.

2010 macbook pro keyboard replacement