Despite the presence of a broadband signal, a flashing red light indicates that no connection has been established. A line that is solid red indicates that there is no signal. To get a broadband connection, look for a green light that’s constantly flashing on the device’s screen.
Why is my ATT Broadband light blinking red?
AT&T broadband that blinks red indicates a problem with the device’s power supply or connection to the servers. Loose cables or AT&T servers that are down can lead to a loss of Internet service.
Why is my router blinking red on broadband?
There is no internet connection if the Broadband or DSL light is flashing. Disconnect the gateway’s power cord at the back. Using the power unplugged, remove and reinstall the phone cord from the gateway’s back panel.