if you put the working cards back in the working machine (back to original) does it boot up?
If not you may have blown one of the boards.... probably the same one that has died in the non-working machine due to the fault in the machine damaging it too.
also if you swapped the memory card you have lost all the parameters and PMC stuff and possibly the ladder as well (although it may be in the FROM). you will need to restore everything from a backup.
it may help to go into the IPL screen and do the system checks etc. on later machines (16/18/21) it's power on while holding right arrow > and the soft key on its immediate left. but that may not help if it wont boot up. you're probably going to need professional help from Fanuc.