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This collection of video's will more complete than most books ... it takes about an 800 page book to cover all the various types of systems and many of them are obsolete by this time. Its quite a slog.
These video's can be a trial too, but at least are free, and you can skip any that do not make good sense to you... also some will have errors in them, but most will not, after you spend a day watching the video's you might very well be able to trouble shoot your own system.
Click here please. good luck with it.
Here is the ratings box near the top of your page, I was waiting for you to get back to me before I put it up