Are you sure you know what you are talking about, do you realize what you are saying when you say a fuse has "shorted?" I think you mean to say the fuse has opened, the exact opposite of a short. A short means that current is diverted around the fuse, totally defeating the purpose of a fuse. Since you suggest that there could be an open or blown fuse, can you supply a photo of the DC/DC board that contains the fuse and the location of the fuse? Thanks