Stan - Obviously you have the depth of understanding to even identify the problem and its cause. Today we see less and less of that. It's easier to train repair people to consult a list of FAQs and replace an entire board than it is to teach them how to diagnose a problem and fix it at the component level. When's the last time most of us raised the hood of our car and recognized much of anything? Not only can we not sit on the fender with our legs dangling in the engine compartment anymore. We can't even see the ground any more!