Hi,
I am trying to replace my current ramps board because I suspect a mosfet blew for the extruder port.
When I attach the new board, everything seems fine until I try to move a stepper. At that point it makes a loud sort of bell/whistle sound. Swapping the old board back in, the steppers move fine, no sound but also blown mosfet.
Has anyone seen this before? I am not sure a how the new board could be doing this, hence the question.
Thanks!