Put in a "brand new" SCHMETZ needle, make sure the flat side of the needle is facing away from you and the needle is all the way up in the needle clamp. You can use another brand of needle if you don't care if the machine works well or not.
If you plan on doing mechanical repairs to the machine yourself it is probably best to just save yourself a lot of frustration and throw the machine in the trash now. Because it will be completely ruined after you try to repair it yourself!
Moss Limbayter, April 2009