Camera and auto bright function not working after screen replacement

I have to change the screen of my MacBook Air 2018 A1932 because it has no image due to the flex problem, I bought a new original screen for my 2018 model, after the change the camera and the auto bright function doesn’t works, I reinstall the old screen and the camera also appears not connected now, I been using it through HDMI with no problems with the camera, but now I have no alternative for online meetings.