Tonight my Archer C9 suddenly lost internet connection. I was in the middle of my twitch stream and it suddenly died. All lights are blue except the internet connection light that is orange.

When I connect my computer directly to the modem, I get internet. So the problem is with the router.

 I've tried restarting the router several times, and held in the reset button on the back. Orange internet light every time.

When attempting to login to tplinkwifi.net from my browser, it will not connect on either hardwire or wifi. So I have not been able to even get into the setup of the router.

Wifi SSIDs broadcast, but no devices can connect to the LAN. Devices are failing to obtain an IP address.

The router has given many years of reliable service, however I feel that due to the sudden and catastrophoic nature of the failure (working one second, dead the next. Cannot get into setup) that it might be finished. 

Any ideas of what I can try before I replace it? 

Thanks!