Were did you get firmware? it may just be broken,
What firmware, marlin, sprinter , repetier, teacup??
It looks like marlin...
And that’s a really old version of arduino
And where did you get the board.txt file for printrboard?
What firmware, marlin, sprinter , repetier, teacup??
It looks like marlin...
And that’s a really old version of arduino
And where did you get the board.txt file for printrboard?