Need some help!

[Chad80]

So if I replace the Main Board will that correct any of this?

 

[Air Cav Scout]

Unless you just like tinkering, pass it off to your local DJI maintenance guy for repair. Or at least let him tell you what you need to do for repair.
The one thing I would be concerned about is damage and liability in the event of a crash. Specially uf you're doing the repairs.

 

[Bone4Drone]

I would like to try and repair it if I can. I'm going to solder the port back on, from what I can see it looks like that has no damage the solder was just loosened from the crash. If one of the motors doesn't work would the P3 still take off or could that be causing the error noise and light?

I'm with you on that. I crashed my first drone (Xiro Xplorer V) years ago and I had the most fun and personal satisfaction fixing it myself. Ribbons and gimbal parts came from China and were dirt cheap. Took some time and, thank God & YouTube, I got 'er done. Flew like new!