Question about Actiontec (GS503AD3-01) Modem

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Actiontec (GS503AD3-01) Modem

Lights on my modem are flashing rapidly in unison. The power light is flashing red, connection light is blank, internet light is blank, and each of the four ethernet ports are flashing green. I have pressed the reset button the back of the modem, checked and rechecked all the connections, plugged the modem into an alternate power change.

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Re: Actiontec (GS503AD3-01) Modem

--If the Power light is flashing red thanits definately problem with the Actiontec Router --As you have checked with different power source, the possibility of bad power source is no more --May be due to some voltage fluctuation the modem is gone bad.

Posted on Jul 11, 2007

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Comcast is my service provider and I have had an RCA DCM 245R modem for almost 10 years. Until recently it has worked fine. On an ever increasing basis I am losing internet connection and when I look at...


It can be an issue with the modem or with the line. When the line drops the link then the modem shows only two lights. And, when you power cycle the modem (unplug and replug it) it establish the session again with the comcast.

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You will have to be a bit more clear on which lights on which model of modem is flashing rapidly.
Usually, as long as the internet works, the flashing lights are there to show that the modem is functioning properly and is currently sending packets, transmitting data, etc.

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