I just installed my EZBoard and the extruder motor now makes a loud and very high pitched noise when active and a rubbing/grinding type noise when extruding. I have a CR-10 with the stock motors. I did not have this issue with the old creality board. I am using the firmware 2.1.5. The only changes i made in the firmware before compiling were uncommenting the define CR10, define EZOUTV2_ENABLE, and define PETSFANG lines.
The only thing I have tried to fix this is adding a tl-smoother which did nothing. I honestly don't know much about this stuff so I don't know what else I can try to fix it.
Please help, the noise is unbearable.