Much better to explain need as per query from Keith above before trying this slightly non-intended feature use suggestion.
Have a look at Configure, Access Points, near bottom of page.
Set the "AP reboots if disconnected..." to 2min say then "apply" and unplug the network cable on your ZD and just wait a couple of mins and plug back in. You could check in the event/activities log that the APs had all restarted.
This assumes you can physically get to your ZD easily.
Don't forget to also change the "AP reboots..." to a more sensible number of minutes.