At start of any cycle , pump runs for a few seconds and “door open” light starts flashing , no water intake or drum action . Door is locked on , so presumably door interlock ok.
Checked brushes,which are free in holder with plenty of carbon !
I`ve had this in the past and having checked every component on the machine , I thought it must be (very expensive) module fault.
If you have checked Brushes ok, door locked, check motor harness, pull on wires at motor plug etc. then i would suspect pcb, had it a couple of times unfortunatly