Sorry about your crash Peter. I would be surprised if all 4 motors burned out at the same time. I would suspect maybe the ribbon connector got damaged? Just a thought but I don’t know. I would try to put d.c. power to them individually before ordering new motors.
I got a p3 pro about 2 yrs ago but haven’t flown it a lot; just a handful of times so I don’t have a lot of experience with it yet. Hopefully I’ll get out with it more often and maybe this forum will help me with any problems I may have. Great site!