Knob on LCD fails selecting menu item
I have just completed my Prusa Kit i3 MK2, switched it on and LCD indicates calibration (as expected). When I try to turn the knob, nothing happens, I can see the menu. Pressing the knob is working, but not the turning, therefore it is useless.
Could you please suggest a solution.
maybe firmware update?
I double checked wiring, all good, LCD works perfectly.
Thank you for your help.
Is this a good question?