Solid red broadband light - even after multiple resets and wiring checked.

I've reset the modem/router, unplugged and reconnected multiple times, I've reset it multiple times and even left it unplugged overnight; I have reset it through the att site and called the help line and they have reset it, all to no avail. I have unplugged all connected wires, including the green phone line and still nothing. My wifi is detectable, I just have a solid red light on broadband and no ability to connect to the web. Techs checked outside wiring and all is fine. Help!