There was no charge for the tech visit since it was a problem on AT&T's end. He repaired that and internet service came back. The tech came out, and after checking a few things, he discovered that a previous tech had crammed a fiber junction into a box that was too small, which caused the fiber to bend to the point that it disrupted the light reaching the ont. I was able to schedule a same-day tech appointment via the website, without having to talk to customer service - win.

The router showed a red blinking broadband light most of the time, but sometimes the broadband light would show steady green, even when the internet wasn't working.Īfter having had several previously terrible experiences with trying to call AT&T customer services, that was the last thing I wanted to do. Our ont showed a green PON light and red alarm light.

Over the course of those 7 days, the problem got worse, until at one point we had no internet for nearly 24 hours. We had not changed anything in our very normal 'setup' prior to this issue starting. We tried all of the usual troubleshooting tips: unplug/reset router, unplug/restart ont, factory reset router, make sure cables are seated, replace cables. Neither ethernet-connected devices nor wifi connected devices worked. This post is meant to help others having similar issues.Ībout a week ago our AT&T fiber internet started going out for hours at a time, several times per day, on all connected devices.

Red alarm light on att fiber box