Hello, everyone. I am trying to add a digital voltmeter to a control box that I built. I cannot get it to respond to the inputs. It reads zero volts at all times. I have the supply regulated and isolated, so that is not the issue. I am reading the proper voltage from the test points I had installed, but I continue to get no response from the meter. I had been getting proper readings before, but the decimal point was in the wrong place (e.g. 123.4V instead of 12.34 volts). When I switched the jumper to the other pin, the decimal point was in the right place, but the meter stopped responding. I do not have the schematics for the meter and I cannot figure out what the issue is. This project is for work and my bosses are starting to get anxious. Please, help.