On the same line of thinking as that pin, make sure the lens/lens mount doesn't have a bluish residue on it. This can happen over time, and it will prevent the camera from recognizing that there is indeed a lens attached to it, and will often keep it from working properly or at all.
Although I assume that since this is 7 years later, things have been fixed.
Although I assume that since this is 7 years later, things have been fixed.