Dear All, My Nikon F4 recently had developed a strange fault. When trying to load film, upon first shot the film advances to the first frame and then the red led comes on. After waiting for a while pressing the shutter button again it moves the film as if trying to load it and then halts with a red led again. The batteries are fresh. Do you know why this has happened all of a sudden? Is it something that can be repaired by me? If not, is it worth repairing it, or buying another body? Many thanks in advance for your advice.