Fault light-- intermittent

[FNK]

Hey gang-
Been running my CNC router parts pro machine for ~ 10 years.
Having an issue today where the E stop keeps triggering (i have no estop its jumped). I cleared it a few times and restarted trying to finish my part.

It just triggered a minute ago in the middle of a cut (stayed triggered- leaving the emergency light flashing on the Mach3 diagnostics). I walked over to the G540 and the fault light was on. I could not clear the Estop in Mach3. Cycling the power on the conrol cabinet resolved the fault immediately.

I'm wondering if my G540 has an issue.

Is there a document somewhere that lists reasons this light could be on?

Attaching a few photos of the setup



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[FNK]

About an hour into websearching. I found this video: which suggests:

This can be related to thermals, but more importantly related to the incoming power from what i believe is a switched power supply. It seems gecko is aware of this issue and has been reworking boards to remove a capacitor-- and provides guidance on how to do this.

Emailing gecko now.