The WiFi on my AX1800 range extender has stopped working. Our phones and laptops can see the WiFi SSIDs from the extender, and these were working just yesterday. Starting today, when we try to connect, it either connects forever, or says it can't get an IP address.

The extender itself seems to be connected to my Xfinity router just fine thought the router's WiFi. If I connect a laptop to the extender using Ethernet, I can access the internet without any problems. It seems to be only the WiFi that's not working.

I've tried completely resetting the extender, same results, I upgraded to the latest firmware, same results.

Anyone have any suggestions for things I can try other than dumping it and buying something else?