@Woodworks 

What is likely happening is whatever is managing the internet connection is bound to the MAC address of the original router.

In previous cases users say in a dormitory would need to inform the IT staff of their new router and provide the MAC address of the router so it can be registered on their security systems to recognize the new device and provide the internet connection.

The amber light on the TP-Link router is the router saying it "sees" a connection, but there is no internet.

Log in to the router and look at the status page, now if your internet IP is 0.0.0.0, then reach out to the ISP, or should there be an "IT Department" where you live and inform them you connected a new router and it is not being recognized.

If you do get a public IP address, say 24.43.56.46 (completely made it up), then the next thing to do would be to configure a DNS server. Go to Advanced > Network > Internet > Select Advanced > Select "Use the following..."

For the DNS servers put:

Primary DNS: 8.8.8.8

Secondary DNS: 8.8.4.4

Hit Save, and then see if the amber light changes to green.