I have rewired everything. That was it. I had 105% belief in Duet that it’s not faulty. I do hope it fixed the issue for good and i think i know exact reason: me not puting everithing on a mount and due to using breakout boards not being fixed and cables constantly moved all over during “makeover”, it left those little hairs doing nasty business to thermistor cable (and maybe other places).
Everything looked ok for a freshly assembled proto-mod of chinese base machine, yet it is/was everything but a nice and tidy thing. The box is printing
As i redid the crimping, & replaced AC power switch, all is fine. I didn’t suspect the breakup board of vga cables to printheads early on..
How does it come to a state, when you can make testing, heating, moving etc, but it fails to operate on gcode?
And coincidentaly, couldnt it be a sort of check-up test?