Chosen Solution

I just finished installing a new trackpad, logic board and the display cable. When I turned it on I got the chime but the screen is black. I’m pretty sure that all of my installations and connections are correct. If anyone has any idea how to fix this it will be greatly appreciated! Thanks

You changed too much at the same time so its hard to identify whats bad here. Your problem could be a bad logic board, display cable or the display its self. The easiest way would be to use a second good system to swap out the display and the display cable to hopefully isolate whats bad. If you have an external display you could give that a try as well.