Not had this one before but had two in one day today, a WF860 & a WF100 both with exactly same fault. Machines completely dead, power into mains filter and down to module but no one at home, no lights nothing. Is this a recent problem or have I just been lucky, both machines under 18 months old.
the wf860 go down all the time, just click the question marks on your partfinder to see how many variants in software, pcb, eproms and motor stacks there are