Hi, there may well be a problem with water in the circuit. If you can, get an estimate for repairing it, but before you send it in to get repaired, have you thoguht of buying a light meter? I haven't used the camera's light meter for some time, mainly because none of the cameras I own have light meters that work. Many years ago I bought a Lunasix F light meter and it can be used as a spot meter or by using it with plastic cap on, it gives an overall impression of light. As you say the shutter works but battery check and needle don't then it may well be an electric fault. Maybe some snow and melted into the electrics and rusted them. The shutter may well be mechanical. Mind you, if you are going to drop it again, which is not a thing I would recommend, then buy a mechanical camera and use it with an independent light meter. Hope this helps.
Phil