ok
switch machine off
hold start and skip buttons in, turn machine on…. hold buttons for 8 seconds then let go
machine should go into diagnostics
press the cotton button, and at every press, a different component will be activated/tested
eventually an e number will come up
theres you fault
fault code list in the known fault code section
oh and after the fault code comes the pcb coding.. try not to change that.. to get back to normal turn machine on/off again twice
hope this helps