When re-installing the Logic board, be careful not to trap any of ZIF cables under the board.
You’ll need to tilt the board up from the end away from the DC-IN board in order to get the IO connectors inserted all the way. Be careful with the little fingers on top of the IO connectors.
I had previously replaced the battery with the Newer Tech battery. The battery cable is not as flexible as the original battery, making the removal and insertion of the trackpad cable difficult.
The bracket for the proximity sensor is critical. some more detailed pictures and guidance would be helpful here. After attempting to replace the screen with a new screen that did not come with the proximity sensor, buying a new proximity sensor bracket, etc. I finally gave up and bought another screen that included the front-facing camera and proximity sensor pre-installed.