Hi guys my new replaced beta amp (which was from an old machine) stating alarm L every 3-4 hours and the machine is shut down since no power on drivers. The problem is that when the machine was shut down while it is running, it caused z axis to drop down about 1-2 mm, which made a spot on my finish surface; And this is horrible not talking about how it would affect the electronic components.

Do you know why does this happen. Is it because of the beta driver is faulty or it is because of the i/o module is faulty, or even the JD1A-JD1B connection wire is faulty ??