I just dragged out my old (about 35 years old) Gossen Luna Pro SBC light meter, and put in a new battery, which checks out fine with the battery check on the Luna Pro. However, when I press the button to take a reading, the needle just sits on the right side and turning the dial to get the needle to zero doesn't work--it just sits in the same place. I'm assuming the meter is broken. I noticed this meter got good reviews at this site and others had had theirs as long as I've had mine, yet theirs still work. Does anyone know a) what I might do to solve the problem myself, or b) a good place to send it to be repaired? Thanks!