I have some knowledge of these lasers. The issue is one of 2 things. TEC failure......tec chip ok, but driver thinking it is really hot and tries to compensate, OR the MCA assembly has become seperated or is starting to. Either way it is a difficult repair. But it can be done. I proved that as one of my repairs is working some 60 hrs of sevice. Only a 75mw, but hey blue is blue!