LAN ports not working but wireless is fine

Just purchased AE to use with my Zoom comcast modem (no router function on the modem).  The wireless function is working flawlessly but I am not able to get IP addresses to hardware attached to the AE via the LAN ports.  I've cycled and reset until I'm blue in the face!  Any recommendations are greatly appreciated!

There are no settings to check. The Ethernet ports are enabled by default when the AirPort is operating correctly.
As a last resort, you could reset the AirPort back to default settings and then set it up again if you have the time.  Hold in the reset button on the back of the AirPort for 8-10 seconds and release, than allow a full minute for the AirPort to restart.  Then, set it up again and check the Ethernet ports.
I assume that you have checked to make sure that you have a good Ethernet cable.

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