We may have found other answers which could help you.
Click here for Frister Rossmann BeaverPresser foot level, needle and thread guide have fallen out?
The thread loops under the fa?
How can I mend my Frister & Rossmann sewing machine?
Sewing machine starts on its own?
Singer zigzag 457 Stylist not threading bobbin/making stitch?
How to switch on light of sewing machine?