Haas Alarm: 203 LEAD SCREW CRC ERROR – Lead screw compensation tables lost by low battery. Check for low battery and low battery alarm. Save parameters to USB or other devise. Original parameters may need to be reloaded. Lead Screw Comp Tables can be viewed by pressing PARAM DGNOS, then END, then . Take note of comp tables. Are any numbers entered? Corrupted Comp tables can be cleared, if needed, by pressing 0, then ORIGIN. Arrow down to Y and Z tables and clear them as well.