That sucks! i got that 410 error on a couple of my mills latly, and found the power supply, 12v &5v was out. (Its on the back of the drive) one of the power supplies showed the volts good, but it didnt have any amps. If yours is working, Being very carefull so you don't electricute yourself, did you try to manually (with a insulated handle screwdriver) push in the E-Stop contactor and jog an axis? if the axis jogs while holding in the e stop contactor, then something in your e stop circuit is bad. of coarse, im assuming the e stop contactor never pulled in.
follow your e stop circuit, check for continuity where it goes through the axis drive, amoung other places.
no power comming to the drive from the encoders, will stop it from comming alive. Are all your encoders plugged in?
Did you build this system yourself? If not, have whoever built it check it out.
Centroid/Ajax does have some dang nice hardware and software, unless yours was abused somehow, i think your problem is fairly simple.