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Dewalt 7 1/4" cordless Saw , DCS570


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When I try to use it, it just starts, and shuts off. 


It makes a soft grinding sound and shuts off after about a half blade revolution. 


The little LED lights turns on when I press the trigger.


I can rotate the blade and it makes the same grinding noise. 


Not a sharp metal on metal grind, almost like a hard plastic on hard plastic - dull grinding.


It gets fresh battery and still the same.


I've removed the spindle assembly and it still does the same. No loose metal in there to indicate a stripped gear.


I dont think the armature fins are dragging on anything.  


I did notice a wire's insulation was rubbed raw. As I separated all the wires, it started to run for about 2 revolution, then die again. 


The battery almost feels like it's drained because it will stop even trying after a few tries.


If I let it rest, it will start again.


The little black resister gets pretty hot while I'm attempting to operate this thing.




Thanks in advance.

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