Guys I have started this post by post a YouTube link so we can get some ideas and knowledge and may be if other members come a cross any other good links they post here it can be helpful to all of us But, if Admin thinks its not worth than, I don't mind this post to be deleted and also if I did a mistake by post it on here than I am sorry.
Here below links explains how to test the faulty circuit, hope it helps...
Here below links explains how to test the faulty circuit, hope it helps...