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well.. tried the board in different computers etc… and doesn’t work. if you have a pc, try installing the drivers with the board connected. if the board is ok, it will say that drivers were installed correctly. if your board is bad, will say something like the drivers are pre-installed. This is my rudimentary test cycle.
so, i concluded the arduino is faulty. it powers up, but it doesn’t connect.
I am installing a rumba board that took from other machine because has issues with the heated bed. so i will be using that for now. connected and seems to work fine.
hope this helps