Hello, I just recently bought a Singer Confidence Sewing machine from a student who only used it to sew a pair of PJs and a pillow, so it is virtually unused. It has been working fine for the past 3 weeks, but it jammed today and I am at a loss on how to fix it. I believe it is the timing that is off, but I will tell you what happened and see if I am correct. The machine jammed and the bobbin thread became tangled. When I removed the tangle, the needle is hitting something underneath the bobbin holder and will not depress completely down. Also, I can no longer get the needle plate back into place. Can anyone out there help me or do I have to take it in for service?