Chosen Solution
Hello guys. please I need your help, After the replacement of the keyboard, I noticed the screen shows light but not displaying the object (eg. the apple logo). So for troubleshooting’s sake, I connected a Macbook Pro 2014 retina 13’‘ screen, to my surprise, the diode next to the screen terminal exploded. Since then I have been getting a black screen. please how do I know the component responsible for the screen to display black? Your response would be highly appreciated. FYI. it works on the external monitor.
I guess you discovered the differences between iDP and eDP interfaces! Apple has jumped around using different displays from different sources and in some cases the interface was altered as well. The breakpoint here is between 2012/early 2013 and the late 2013/2014 which is different!