Before I schedule a service call (the modem is the cable companies) I thought I'd investigate this problem a little further. For almost four years I have not had any dropped connections with a Motorola SB5100 and a Linksys WRT54GS hard wired to the Desktop. Around midday yesterday I could not access the internet. I just attributed it to cable maintenance. However, at 4:00AM this morning it was down again. In both instances, the "PC Activity" light on the modem was lit, but wasn't blinking or only blinking intermittently. All of the other lights were on (except standby). Eventually service returned. I'm wondering that since the "Activity" light was on that the modem may not be the problem? Thank You!

4 solid green lights mean modem has good connection to the internet/cable network. blinking activity is connection between modem & pc/router. if it happens again, i'd reset modem, then router and retry. if you still have 4 green after that but no internet, try bypassing router to isolate problem.

Chances are there is nothing wrong with any of your equipment. My experience with Comcast has shown that the people who manages the phone banks know nothing about service outages or maintenance in my area. All they can or will do is lead you through rebooting the modem, if that don't work then they will blame your modem if you own it or your router if you tell them you are using one and schedule a service call.

Every time I went through this the problem magically corrected it's self before the service call day.

Give it a day or so and keep calling and complaining they might knock a few bucks off your bill...

his symptom was "activity" light not blinking or only intermittently. normally you would see rapid blinking, indicating transmission between private & public network (router & modem). 4 green lights indicate good connection to fiber network, no physical outages, though dns outage still possible. nothing wrong "physically" w/ your equipment but common culprit is private network, which is easily fixed by router reset - and which also "magically fixes itself after some time". instead of waiting i would be proactive & reset at least router to isolate issue, takes less than 1 min.