My $100 HF metal cutting 14" chopsaw that I got on sale for $50 years ago was still running strong up until a few days ago. Clicked on the trigger and *nothing*.
Pulled out the brushes. They looked good, but I turned them around just in case. While tightening up the second brush cap with the screwdriver, I went a touch too far and it busted off. (No, I wasn't twisting hard).
But, since the cap was still in place, I plugged it back in and tried the trigger. It worked!
While this chopsaw works OK for cutting metal, be aware that there is excessive wobble and vibration in the saw (bearings are horrible), and the cuts are not clean at all.
For me, I got it to cut rebar, and it works great for that. It pretty much sucks for anything that requires precision.