Chosen Solution
Replaced the screen on my Mac Pro 2018 and it starts working, but after reboot the laptop black screen! If connect laptop through hdmi to external monitor, screen starts working and will work till I reboot the laptop! What can be the problem?
The reason you may not see anything on the new screen is because apple locked down the screen replacement, so if the computer sees a screen it does not recognize and is not programmed to the logic board it will disable the screen. There is no way that I know of to make it where the screen is programmed to the board, and I doubt apple will do it.
My 13" MacBook Pro wouldn’t do anything after a screen replacement till I plugged it in even though it had a fully charged battery. Try this before having a heart attack or tearing it back apart
I have a similar issue. My son replaced the screen with an authorized dealer. Initially, Apple folks told me that the service center my son went to only allowed to repair iPhone and ipad.. long story short, Apple did something and booted the same system with the same screen. It worked for four months, but when the battery died, my son didn’t use it for a 4-month device; it was back to the same issue. My guess is you need to do something. They run some checks on a system with a T2 system. Based on the fact that it did work, I assume Apple uses tool that disables that check.
