@Obie 

Support exists, and must be contacted to do troubleshooting. If the device is found to be bad, the agent will begin the RMA procedure. They will also be able to assist with regsitering the device. It sounds like the serial number is not in the database.

Live Chat: link
Phone: link
E-mail: link

@Tony 

Support failed to respond on several attempts.  I called several times but got dropped twice and was on hold 3 other times for 20+ minutes.  I got through to once but he evidentially had his headset on mute because he could not hear me.  Amazon support even tried to get someone on the line.  Also chat support would not work at all - on multiple browsers on 2 separate machines. So TP links claim of 24/7 support is hogwash.

The registration system refused to take the serial numbers of 6 different devices.

In the end Amazon issued an out of band replacement.  They were even amazed at TP links lack of response.

-Steve