Probably wouldn't hurt to reboot the APs. if both the laptop which can reach the internet and the ZD are on the same subnet the ZD should be able to get out -- unless its possible the gateway IP is different than it was before? sometimes its .1 other times i've seen .254 as the gateway IP (though in theory it could be any IP in the range). Probably wouldn't hurt to reboot the ZD as well.
Given that its only 10 APs, at the end of the day rebuilding from factory default is not a big task. That might be your best bet since you will need access to the controller at some point, even if the system is running while you're locked out, right?
Seems like an odd problem with likely a simple issue but tough to get a pinpoint on it running blind. In theory, everything should work just the same if the settings are truly just the same...
Sorry i could not be of more help!