Recently I purchased a "Broken" Soligor Spot Sensor for $5. No idea what is wrong with it yet, put batteries in it and nothing happens. I've managed to repair a few cameras so figured I would give a shot at fixing this spot meter.

Anyone have any ideas where to start? Are there normal issues with these meters that I should check for first? Does the sensor tend to go out on them? Any idea where I could get an exact replacement? Are there upgrades to the stock sensor?

Any ideas where to start might save me time trouble shooting.

Any input appreciated.