The quadra has aaui to ethernet adapter.
AAUI is ethernet. You just add the medium of your choice with the transceiver (10BaseT/10Base2/Fiber). The problem back in the day was that it's wasn't clear wich medium the customers wanted. The market was in flux. To save money they just decided to add ethernet, but so that the customer can choose the medium.
drag them all to a new folder and add them back one at a time, reboot after each one to find the bad extension.
Use half the extensions and reboot. Then the other half. You have now verified that one half is good. Do the same with the bad half and repeat until the bad one is found. :approve:
