Failure to initialize

I have not used my machine a few weeks. I turn it on today and im getting errors. When i did some cord management i had the power supply blocking theY access. I fixed that and the machine sets the X & Y but once it has me enter the tool, it moved down a tiny bit and shows this error. GRBL 4 alarm. Ive unplugged evey connection and reinserted it. Ive moved every gantry and there is no bind. Whats wrong?


Is your Probe stuck on?

Where is your BitZero? Is the ground lead touching it? What colour light does it show?

The light is red. When i press the button down a green light turns on. I dont know of any lead that would touch it.

Do you have a BitZero?

If not, what is plugged in at the front of your machine in the connector intended for it?

see pg. 54, Figure 6-3:

c.f.,

pg. 36, Figure 4-5

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I do not have a bit zero. Maybe thats rhe problem. The black, blue, brown cable from the side is plugged in there.