I noticed excessive sparking coming from the motor. And there is a weird smell and a bit of smoke coming out. Also, the saw is maybe running at 20% speed. It's unuseable. The brushes are worn somewhat, but still make contact. The armature has a couple burned spots, so would that be the problem? Also, upon dismantling the motor housing, I found some short pieces of copper wire, had broken off. I can provide pics or video if that would help. I will be ordering parts and repairing the saw myself, once I know for sure what I need to order.