If by "component" you mean a box (vhf radio, autopilot brain, etc.), I'm with you 100%. However, if you mean something like a resister/capacitor/transistor, I don't think many people out there have the ability to diagnose a problem with one, let alone replace one, especially with today's surface mount circuit boards. I have a BS in Computer Science which included a bunch or electronic engineering and I don't try to work down at that level.