Acces hooked up for over 3 hours. Flashing red light on front, nothing on back. Have rebooted both the router and the Access. What is the new common problem with this one?
If you have no lights on the back on either side of the Ethernet connection then you have a basic connectivity issue. That is the first problem you need to solve. Nothing will work until you have basic connectivity. Try re-seating the Ethernet cable into both the Access and your router (make sure it "clicks" and is fully seated in the connector. Try a known working Ethernet cable. Try a different (known working) port on your router.