Need help!!

I posted few days ago about one of my motors not working so I got a new motor and soldered it on and am facing the same problem still ?? What should I do everything looks fine my connector from esc to FC is fully connected and my solder doesn’t look bad or any worse than the other motors. Is it safe to assume that it is a esc issue?? Is there anyway I can fix this with a software??. Any help is appreciated!!