iPhone 6 + rear camera not working

Hi

I have an iPhone 6 + with a faulty rear camera, when I open the camera app, it get freezed, I can not take any picture or video.

The front camera is working.

What I did:

- Clean restore to ios 8.1 without restoring any backup, the same problem.

- Reset all setting, nothing.

- I did disassemble the phone, disconnect the camera from the mother board, and connect it again, still the same issue.

If I change the camera, it will work? because the flash led is not working as well.

thanks.