I was going through my box-o-reject Axon II's and just realized why two weren't working . . . the microcontroller chip was missing lol . . . all other components soldered on and working fine.
If anyone wants one, I'm selling them for $30 each.
You will have to solder your own ATmega1280 onto it.
And then it'll be Arduino compatible.
If you suck at soldering, this is not for you.