Hi any one know what could cause a kitchen extractor fans lights and fan to stop working fuse not a problem voltage is present no lights poped it's a friend of mine he told me was working ok un till he tried to turn it off it wouldn't turn of so he just switched off the fused spur for it now it won't turn back on its a Neff make D8150N1GB/03 first thought could b the pcb replacement part is ÂŁ170 any one got any experience with them