X axis just stops moving

My set up: xl legacy table, everlast 62i plasma cutter
My problem: trying to run a program and the x axis just stops moving after a few lines of code has run. I pulled the cover off the electronics enclosure and the step driver blue light is off… i have replaced the step motor and the step driver and the problem is still there . I have also lubed and adjusted the lead screw and the bearings. Ive been intouch with langmuir and still trying to figure this out . Anybody have any ideas where i should look? Thanks in advance

Just a WAG here but I’d check the pins in the DB9 connector for the X axis. See if any pins are burnt.