Loose wire connection between modem to the router may cause the flashing orange light problem on your netgear router. If this happens you wont be able to do the following.

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Router internet light blinking. If the power or diag led light emitting diode on your linksys router is blinking it means the firmware is corrupted. Just because your computers may be off or your router unplugged doesnt mean that. Click on check for the link of service. Unplug all the wire connection of modem and router. The led light indicates that your router is connected to the isps network. Blinking internet light means you have internet activity.
Like a modems lights a wireless routers lights blink when transmitting data to a wi fi device such as. They indicate your connection is up and healthy. On a router most routers have a single light dedicated solely to the status of the internet connection. I do have internet connection and it is still fast and responsive. Lol just kidding blinking is normal. This light is often labeled as internet wan or marked with a symbol of globe or a satellite.
In most cases flashing lights on your router are a good thing. A little up front research can prepare you for internet access failures and other computer networking problems. Replace if the cable lan port and wire are damage. Access the routers web based setup page assign ip addresses to computers connected to your router using its dhcp capabilities. If you want to stop it disconnect the cable going from the modem to the router. The color of the adsl light is generally amber.
Now reconnect modem straight to the internet port named wan on the router. A wireless routers lights blink even when a wi fi device is not wirelessly connected. Log in to your comcast account. Have a check for the service interruption. When you switch on the router the adsl light will blink that indicated it is trying to find and connect to the isp network. Go to your xfinity my account smartphone app.
Why is the wireless light just blinking. I have disconnected the modem and router for about 1 2 minutes then plugged in modem first once all lights are up plugged in router but the internet led is still blinking amber. The blinking lights on a router are talking to you. When the power came back on i noticed the routers internet led light was blinking amber. However if the situation persists for long follow these troubleshooting steps to help get your connection established properly. Once it gets connected the light will stop blinking.