I¡¯ve had this problem with my C3-31. These guys (especially Imran) got me up and running again. Before ordering new capacitors, I¡¯d try pulling that module out of the front of the saw and spray a little contact cleaner on any contacts or connections you see. Try to get some into the back of the start switch as well. Don¡¯t overdo it as it will collect dust. CRC or I used Deoxit.?
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Caesar Simon