new ramps board, steppers make a loud whistling sound

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!

Have you installed the 3 jumpers under each stepper driver

Correct!!!

It has been a long time since we put the printer together that I had forgot this step.