For the first month the thing worked fine. Now, all I see is the 'activity' light blinking every couple of seconds but the 'cable' light is out. If I cycle the power, the cable light is on for the initial bootup procedure, then it goes off and the 'activity' light blinks for several hours, then I get a signal out of nowhere again. This 'good' signal may last 10 minutes, and it may last 12 hours. It's all very arbitraty. I read about this happening to quite a few others with Comcast service at the broadband forum but I found no resolution to the issue. They mentioned another brand cable modem would sync up but I really would like to keep the linksys. Is there a firmware update that may fix this? I'm at work right now so I can't give many specifics but I'm about fed up with it. I bought it at Best Buy. If more information is needed I can gladly supply it. Thank you for your attention.