Hi there,
Sorry that you are having such problems. I have a janome 4800 and through a lot of trial and error (on my part) I have learned to use the different threads. I also wrote down on cards the settings and needles that worked with metalic threads etc, that way I could refer to them again. Keep trying is all I can say.
PS. I have been asked if I would like to sell my machine...NO WAY..lol
Alanna :wink: