The CNC lathe machine stop during the machining, and the CNC system is halted. There is no response by pressing any keys on the CNC control panel.

Turn off the power then restart the CNC and machine, it works but after a while the same problem occurred again.

Check outer wiring of the machine and CNC system, nothing problem.

Then check the CNC system itself, and found out the gate-array dock and IC of the CNC system main board were corroded, could be caused by admission of water.

Change the main board of the CNC system and make better protection, the problem solved.