Front and back cameras don't work (black screen)

Hi all. I’ve recently replaced the digitizer on my cousin’s iPad 5. Everything works but the cameras. The app opens and I know I can “switch” camera’s because the available options change but both are black screens. It doesn’t take a picture, or record video when the buttons are pressed (using the on screen button or volume rocker, it does register the button press though). I’ve already done a completely restore (updated to the newest iOS in the same process)

I will be opening it up but I thought I’d ask if anyone had a similar issue. Using the breakdown, both cameras are connected directly to the logic board. The only thing I can think of is that BOTH cameras became disconnected for some reason or another.

Thanks.