My Singer 7422 Advanced portable machine locked up when I was trying to use the zig-zag stitch for repair on denim fabric shorts. I had to cut the material/thread loose. It sounded like it was hitting something. I re-threaded the machine and it will not pickup the bobbin thread. I have tried to locate a manual on line. I can't even remember when I purchased this now discontinued model. Any suggestions upon a possible repair?
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Make sure the bobbin is secure in the housing, also check for threads that may be jammed inside!
Thank you. I actually removed the thread and everything from the bobbin case. Took out the case as well. Use compressed air to clean inside.
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