Before revision: A basic principle in troubleshooting is to start from the simplest and most probable possible problems first.This is illustrated by the old saying " When you see hoof prints, look for horses, not zebras " , or to use another maxim, use the KISS principle.This principle results in the common complaint about help desks or manuals, that they sometimes first ask: " Is it plugged in and does that receptacle have power?
After revision: The first basic principle in troubleshouting is to be able to reproduce the problem, at wish.Second basic principle in troubleshooting is to reduce the " system " to its simplest form that still showa the problem.Third basic principle in troubleshooting is to "