bad motor

I recently built my new drone on an it has been flying well with no issues yntmy last flight, I noticed a prop too a little damage so I landed it and replaced the prop but now when I try to fly it one of the motors does not put out the same amount of power anymore and it cannot take off now, it...

Hey Guys, I am pretty new to the fpv hobby, so I dont quite understand everything yet xD. Problem: I've crashed my Quad pretty hard a week ago. ESC didn't seem to be working, as the motor would just jitter back and fourth. I checked that that was the problem, by soldering the Motor that wasn't...