I just bought a used magnetospeed and when I plug it in it goes through all the settings like it should. But at the end the instructions say that it should have 4 dashs on the screen. but mine has 3 dashes and a 0 and it wont pick up any shots. I've searched trying to see if I could figure it out but haven't found anything. So I was wondering if anybody has any suggestions before I call magnetospeed in the morning