Ender 3 pro new motherboard V4.2.7 stepper do not work



  • hello to all,
    some days ago the stepper driver for the filament transport has broken.
    I bought a new motherboard wit the same version (V4.7.2) and installed it.
    Now I found out that none of the steppers works.
    The heating of the bed and the nozzle works but the steppers do not work anymore.
    When I switch the printer on then it there is a short noise like a hit. And when I start a stepper then I got the same noise.
    What could be the reason for this behavior?
    Must I build and install the firmware again?
    Thanks a lot in advance.
    Kurt


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