Nothing is simple when checking dishwashers. If you have no function at all when you press run then most of the time the board is faulty.Often the odor you smell is the transformer on the board or other components having gone faulty. Would suggest you checking the door limit switch out as this can also inhibit the operation.(Taking it that there is no operation at all). If some things function, then you will need to check various things like water sol. Wash motor Drain motor and sump limit for any leaks. Note, plug must be pulled out before commencing work. .