Chosen Solution
Hi, I just replaced the screen of my macbook pro with a new screen. The problem is that the max brightness is much lower than before and expected. I tried resetting my NVRAM and SMC, and once I reset my NVRAM, the Apple logo appears fully bright for 5 seconds, before something occurs (maybe software side?) and the max brightness decreases by around 50%-80%. A connected monitor maintains the correct full brightness level. Is this some bullshit Apple is pulling by placing software into the retina screens? Does anyone have any clues on how to solve this problem? It is most definitely 50-80% dimmer than before, so don’t tell me to go into a dark room lol.
Can you verify that you installed a 2018-2019 display? If you check here they mention the following: “2017 Screen will work on 2018 model but it will glitch during boot + no truetone.” That sounds similar to your symptoms. Otherwise I would be inclined to think the display you got has a defect.
