so i finally got my new bearings installed in the spindle, and my nm-200 is running better then ever. however, as of lately the screen will go all weird with colorfull lines running up and down and the display is frozen and the machine stops. this has happened several times over the last few days and is getting more frequent. it always does it at the end of a cycle at m09 m05 and before z retracts to tool change position. not sure that has anything to do with it, but kinda weird that it is always at the same line of code, but in different programs, and at different spots in the program. i restart the computer and all comes back on fine, and i retouch off, and all is well for a few more cycles, and it does it again. some of these cycles are long, some short, but thankfully it only does this at coolant/spindle off. any thoughts?