A friend gave me his old Hi-Matic 9 to try and sell. I removed the old corroded battery, cleaned things up and tried a PX-625A alkaline. I know it takes a mercury battery but I was just trying to see any meter action. Nothing happens that I can see even with the meter check dots set. The needle stays at the top of the scale. I just wanted to verify that the 625A should show some type of meter action. If it should any ideas why my meter needle is dead?