I have the same model and all the LED lights but for the Tel 2 flash constantly now . This started several days ago and before that only indivual lights were flashing. I contacted Arris tech support and the tech told me all the lights flashing represented a modem failure. This same pattern of lights working and then all flashing has happened with two other leased Comcast modems. Comcast tech support told me to replace the modems with new leased modems which I did. The current modem I purchased. Seems strange that three modems would have the same failure pattern. Am I getting bum advice?
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