Wifi extender blinking red

my AT&T WiFi Air 4920 has been blinking red today. I’ve tried pairing close to the WiFi gateway, to no luck, I’ve tried pairing via an Ethernet cord, to no luck. Why would it just stop working after over a year of working?

I"m having the same issue. I had two extenders that stopped working in the last two weeks. Just bought a brand new Air 4920 that arrived today and that also is blinking red. I have the extenders pairing right next to the gateway and I've paired via ethernet cord. Can't find any other help other than saying move the extender closer to the gateway.

I'm having the exact same issue: Had 2 extenders for >1 year working fine. Inexplicably stopped working this week- blinking red on both extenders. Router still works, but the extenders will not pair, despite trying all the recommendations online to re-pair. Frustrating since content online is so limited.

I am having the same problem. Did anyone find a solution to this?

I'm looking for a solution to this as well. I've had the extender for over a year now. I've tried all the suggested solutions to correct the blinking red lights. I have moved it closer to the gateway and powering off/on a couple times. I have also tried directly connecting via ethernet cable, but no luck. I'm starting to wonder if these extenders are just defective.