u/Adomm1234

Hello,

I replaced screen on MacBook Pro 16" A2141 and camera stopped working. In the past (2019-2025) the display on this model was not paired with the logicboard. I found out that this has changed, I found this:

• since the update to macOS Tahoe 26, the display is paired with the logicboard
• After replacing the display, the camera, TrueTone and automatic brightness control stop working. TrueTone shows up in the settings and can be turned on and off, but it physically doesn't work, nor does automatic brightness control (after shining a flashlight on the sensor or covering the sensor, the brightness doesn't change), the camera pretends to be turned on and the system sees it, but all applications only get a black image
• It's not a hardware fault, because after returning the original board or original display to new board, everything works flawlessly on both machines.
• After loading the diagnostic mode (by holding D at startup) and then booting into the system directly from the diagnostic mode, the camera and automatic brightness control work for about 2 minutes after boot, then they stop working. The camera works indefinitely if you start Photo Booth app or other app using camera after boot, until the application stops using it. As soon as the application stops using it, an attempt to turn it on again only gets a black image, so something is blocking it in software.
• I found on the internet that it should be fixable by replacing the display cable from A1707, I tried this, but it didn't help. I also tried other cables from A2141 without any result.
• I tried DFU revive / restore and it didn't help.

Does anyone know how to solve this problem?