[Angrybird 12]

I was a instrumentation mechanic that worked for a large chemical company. Many of our instruments were tied into computerized control systems and I can tell you that electronics are very hard to diagnose sometimes. A problem in one system can cause issues in one or more other systems. And sometimes all it takes is someone using the wrong wattage light bulb when an indicator goes out, guess how hard something like that is to find. It's usually a lot more complicated than it seems. As we used to say "Electronics, when they work they are great, when they fail they are a PITA."