manipulation of hardware is what active troubleshooting is all about simply put you must know something well enough to manipulate it to a fine degree if you want to be a technician this means having the books, schematics, secrets or whatever necessary to exercise the entire device one piece at a time. Some persons can be much smarter than others at this. today the world is so overcrowded the bosses can pick and choose at will so this world is no longer in the hands of the common man. It will take a world war to give control back to the average human being. These so called bosses are now treating humans like they are in fact machines to be manipulated.