iPhone XS Max All Cameras Not Working

Hello, I have an iPhone XS Max which I recently opened up, and all of it's cameras randomly stopped working. Along with the cameras, flash and Face ID have been disabled. The strange part is, when I unscrew the motherboard and lift it some, sometimes all functions will return. Everything was working last night and I let it sit overnight, but now everything doesn't work again. Does anyone know how to fix this issue? Thank you