1.First notes above treble clef staff are G, A, B, C
2.First notes below treble staff are A, B, C, D
3.First notes above bass clef staff are B, C, D, E
4.First notes below bass clef staff are C, D, E, F
You could no longer do standard seaming, but you could do free motion embroidery.
If you want to fix this there are a few common ways that they get broken and fixed from home:
thread could be jammed, just remove the needle plate and clean
hasn't been lubricated in a while, either take it in and have it done or do it yourself with a drop of sewing machine oil
or because they're dropped, in this case just look for a switch.
if it's not any of these, you may want to take it in and have it looked at :-)
