What commonly happens is that there may be no sign or clue in the battery compartment and its contacts. But on the backside of the compartment that you can't see, has corrosion where the wire(s) are soldered. Further, corrosion has been known to "wick" along the wire underneath the insulation and corrodes at the other end of the wire. Strange but true. There's something about copper that corrodes when everything else looks clean as a whistle. I'm not familiar with this camera, but if it has its meter switch as the "out" position of the wind lever, those contacts can be tarnished too. At this time I see no reason to believe that the electronics themselves are bad. Could be, but its is the most unlikely suspect. Remember, NEVER use a screwdriver on a Japanese camera that is not JIS.