Fancy microwave not heating failure

Life, microwaves have a fault is very strange, very difficult to repair. Most of the components such as measuring the stove are normal, even replacing transformers, not yet, but in an experiment found transformer shell and shell fire the stove, furnace transformers with a stove for, ensure that the ground after heating to normal, Lenovo original another poor grounding it? Try holding the mood, take a ground wire between the transformer enclosure and stove heating to normal. It is inconceivable, the original machine is the fastening nut of how has this situation come about? Estimated that this fault associated with the kitchen smoke, right? We encounter this type of problem to give it a try!