After moving 2 years ago, my bonsai started turning brown. All of the leaves have been brown for some time now, my husband keeps watering it and refuses to give up on it. I think it just didn't get enough sun after we moved, we do not have a lot of sun in any of our windows. Is there a way to tell if a bonsai is dead? After 2 years I have been ready to give up on it for some time now, but my husband won't give up on it. Any advice?

Thanks.