I bought a used OM2n with a Program Back at an estate sale along with a Winder2, 50mm 1.8 and 21mm Olympus lenses (No the 21 isn't for sale)...anyway, I assumed the batteries in the camera were dead so I replaced them with Eveready A76. When doing a battery check the light in the back of the camera does not light, the shutter locks up after triping until the auto, off, manual lever is moved up to "check". After opening the back of the camera, removing the lens I discover that the shutter is not opening at any speed except bulb, when it stays open as it should. I put these batteries in the program back and they work, so I figure it isn't the batteries. It looks like the camera isn't getting power? So is it worth a repair, or just find a good used body?