Look without photos of the unit it's anybody's guess as to what you have. As for it being a new P2 non-vision I doubt that as there's no part that looks like that on any of the manufactured Phantom 2 line. So if you want help take the photos and post them.
DJI used blue Loctite of all screws to insure they didn't come loose. Never had a problem and had mine apart many times using the same screws. Of course if red Loctite were used it would be a problem to remove those screws.
That's normal. Those are brushless motors and there's only one moving part which is the stator and each time you rotate the stator it comes in contact with the next magnet. Now either one of the screw is or in the wrong hole. Are all four screws used to mount the prop guard or just two? I...
That motor may have the wrong screws mounted after previous owner removed the prop guards. Prop guards used longer screws so take a screw from another motor and use it to compare all four screw are the same length on that motor.
To my knowledge, there are only two items that will keep the motors from starting up and those are two spring-loaded info contacts and the GPS connections to the mainboard. If either one or both info contacts do not mate with the battery or the GPS cable on the mainboard has come lose the motors...
There are no
There are no datasheets or spécifications for that 5.8 GHz receiver. And by the way, that receiver belongs to a Phantom 2 vision, not a phantom 2 non-vision which uses a 2.4 GHz receiver. What reason do you need the specs?