We have a few of IotaWatts whose voltage inputs are not working (i.e. we get no voltage readings). We have checked the issue with multiple eliminators, and the issue still remains. The connections and pieces look in perfect shape. In two Iotawatts we get no voltage readings, while in another one 2 out of 3 ports (13 and 14) have readings, while input 0 is mute.
We do not know if there was a voltage discharge which may have affected the operational amplifier (LM358), which we plan to change to see if that solves the issue.
Any additional help on what the root cause may have been and the solution will be greatly appreciated!