iPhone X Cameras don't work after replacement

I factory reseted the phone and is still the same, cameras are black. Will try changing the front camera, because have the old one in and will try again, but I fear that it will be still the same. Thank you for the answer anyway. I really don't know, why did in the phone service tell me that the new camera must be reprogramed from the old one. I never heard such a think.

do you have another phone to test the cameras? can be a component lever repair.

No I don't have, but I will try to get it, but I think that the new cameras are good. I had the phone in one phone service for diagnostic and they said that the cameras don't work because the rear camera is bad, and that they had to transfer or reprogram data from the old camera to a new one. And then will the front camera also start working. But because I already bought the cameras and they want to charge me for a new cameras , didn't want to live mine cameras in the phone, I took the phone from the service. Didn't believe that they must reprogram something. But now I see that it must be something about that. But if something was wrong with the mainboard, they would say. I really am frustrated about this. So if someone had some good ideas, be very glad and thank you for the answers.