could be lots of things but first i will check for dirt/cotton stuck in hook drive ,if thats clean you gonna have to try and find the seized part and hopefully with lots of patience and penetrating oil get it loose,if not save yourself a hefty bill and find a good techno
johan
October 2016
I can answer this question...
The handwheel on my left is sewing machine won't turn ?
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Try fixfault.com to fix sewing machines.