Remove nose from book. Move to reality of what the eyeballs verify.
One's nose must read the book before one's eyeballs know what to look for. I am a hands on verifier. I use my test equipment to check. Then I can determine whether something is right or wrong. In some cases I can correct the problems. I do realize not everyone can do this. So knowing code and colors etc. probably won't help them. But if they know there can be problems and they have the very simple basic tool they need to check for problems it could save them burning up that microwave control board previously mentioned - or their computer - or their TV - or their entire RV. I am trying to find a way to help people here. How about if some of you other informed people try to provide something useful for a change?