I do have the same problem, I had my own modem, the tech. Told me that the problem, was probably my modem, then he change it with a comcast one. Well it work for I little while, I would say a couple of days, now it's doing it again. Every time I call the tech support, they just refresh the signal, that's the only solution apparently they know. I just like you, I'm getting fustraded and I'm considering get rid of Comcast, because they not only can't fix it, but I'm paying even more because of the rental fee for their modem. Yesterday, I call them again, they did the same, (refresh the signal) but this time they gave me a phone # for WI FI tech support. I just don't get it, do they have separated support for WI FI and LAN? Any way I have not called yet, I will call them tomorrow. The phone # is 1-855--308-9452. I'll let you know how it go, Keep me posted if you figure some thing.
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