My trusty RT N66U recently lost wifi capability even after hard reset.

I'm able to access router configuration via wired connection and I can see nothing wrong with the wifi settings. i even changed the ssid and wifi password and rebooted the router. Still couldn't get wifi to work. Can't detect the ssid and manual setup also failed.

Tried to connect from multiple devices PC, laptop, android and iOS tablets and phones.

Any ideas?

Also is the new RT AC88U configured to support unifi?

Thanks

Thanks. Not sure if it's still covered by warranty.

Also, I meant the AC87U. Is it unifi ready?