Main display is frozen and unable to select any wash cycles. When selection knob is rotated nothing changes on display nor can you reset timer or the delay wash. Does this mean the main processor module is faulty that the wash cycle selector is on. Is there a reset button on any of the modules. I have done the appliance servicing course and also an electrician. I have removed each of the modules but can't see any reset buttons. Please advise what I can do next.