Sounds like a rather nasty short. I would suggest trying a different servo on the 'damaged' rx, and the spare one too. That should tell you if its just the servo or the rx too thats buggered. If nothing happens when the bec connected up, sounds like that is fried unfortunately. Did you have the system powered up when you were soldering/re-wiring?
yeah the servos are roasted,everything else is fine,oh well,went to the hooby shop and got a single hi torque servo and actually like it better,cant be with out my emaxx live and learn i guess