I have a Milltronics ML15 lathe with a bad servo board. I purchased a set of 3 boards from a Milltronics mill that have the same number (GA370-3 370-3001 (C). The original X axis card in the machine still works and the machine will home the X axis. If I try the new cards on the X axis it will alarm out 407 x axis excess error condition. Would any one know if there is a difference between the lathe and mill cards? I wouldn't think that all 3 would be bad.