Well they are right there is no easy way to learn how to troubleshoot, but exp and knowledge of what you are working on help. I have found that when I troubleshoot machines I start with the problem like what is this machine is not doing, then I start with the simple stuff first after that I get more in depth such as input voltages,feedback,sync,conn,etc. Then if I really get stuck I would come here and see if someone could help me here. Chances are they could steer you in the right direction.