Replacement rear Camera does not work (does not initiate)

Hi

I replaced my broken rear camera with a camera bought from eBay, it did not initiate when accessing the camera.

I though the camera was broken so i bought another on from eBay, another seller and it does not work either.

When i plug in the old original camera, it works but it's blurry because it is damaged.

Is there any special procedure you must follow in order to replace the camera?

- Tried restarting, and removing battery.

Appreciate your help.

Kasper.