My wife and I had landscaping done and the workers accidentally cut the fiber optic line to the house. ATT tech came out and re-ran the line. The internet continued to cut out multiple times, particularly in the morning.

A tech came back out, tested the fiber optic line and said the connection was good, but there were errors and replaced the modem with a new modem. Next day and from then on the internet keeps dropping. I get an error message in my browser saying the ATT modem cannot connect to an IP and the modem light blinks red.

To me this indicates there is an issue with the line or network coming into the house, but they are pushing back saying it is my router.

Can a router somehow disrupt an ATT fiber optic modem and cause it to blink red? That doesn’t make much sense to me.

I am going to buy a new router, but it doesn’t seem like a coincidence that everything was fine until they ran a new line to the house.

Does anyone have any suggestions?