We may have found other answers which could help you.
Click here for Singer Touch Tronic 2010
My CG 500/550 Singer Sewing Machine's bobbin isn't working?
Singer zigzag 457 Stylist not threading bobbin/making stitch?
Engine revving up ?
What size needles can I use for my Singer 39a3?
Presser foot is loose?
the thread is bunching on underside of fabric it looks like birdnest?