Welcome to Nikonites. Unfortunately, we are not a repair forum nor do we offer repairs. You might find someone who had a similar problem that can help you by telling you what he did to fix a problem, but just don't hold your breath. Cameras of today have a lot of electronics inside. All it takes is a weak soldering and a lot of things can go wrong.
Have you tried to do a factory reset as per the user manual. Sometimes this can cure many things but I can't guarantee it would solve your problem. A call to Nikon service center or the store where you bought the camera (if you did get if from a brick and mortar store).
Asking for a solution to such a problem is like phoning a doctor and asking for a phone diagnostic... Not too many real doctors would be ready to do such an unethical act.
Hope you can have your camera repaired.