Hopefully, it won't be $120 wasted. My repair guy guarantees his work for 6 months. He serviced my machine and it didn't work when I got it back, I took it back to him and he worked on it with me sitting there watching, finally discovered the problem was my plastic presser foot was worn out! It was over 20 years old so I guess some things do wear out. He replaced it and it's worked perfectly since!