I have had a couple of pretty good computer-y friends look at this to no effect, but I figure, hey, worth a shot.
My wireless frequently doesn't work. I can connect, but it will give me "No internet access." Quite frequently it will connect to "[network name] 2" for some reason, which usually coincides with when it doesn't work.
-I have a MacBook running Windows 7 through bootcamp. Sometimes Mac OS has better luck than Windows. -Plugging directly in has worked, but I don't really wanna run a cord down two flights of stairs and across the house. -We've tried several routers, and none work better. -I don't have this problem on other networks. -The windows diagnostic thingy pretty much never helps. -Disconnecting and reconnecting helps once in a blue moon. Disabling the wireless and re-enabling it also works once in a while. -Signal is fine. -The problem will come and go. It will often be down when I leave for work and up when I get back, or vice versa. It does seem to happen in chunks, though. I'll go a month or two with no problems at all, and then a month where it pretty much never works. -It used to SORTA work a lot of the time, but only give me enough bandwidth to load, like, gamefaqs and that's it.
2012-3-23 2:41:46 critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing 2012-3-23 2:45:0 critical No Ranging Response received - T3 time-out 2012-3-23 2:45:2 critical Ranging Request Retries exhausted 2012-3-23 2:45:12 critical No Ranging Response received - T3 time-out 2012-4-5 13:13:25 warning DHCP RENEW WARNING - Field invalid in response 2012-4-9 0:5:17 critical No Ranging Response received - T3 time-out 2012-4-9 1:13:26 warning DHCP RENEW WARNING - Field invalid in response 2012-4-9 21:46:0 critical No Ranging Response received - T3 time-out 2012-4-12 13:13:27 warning DHCP RENEW WARNING - Field invalid in response 2012-4-13 17:29:16 critical No Ranging Response received - T3 time-out
There also have been tons upon tons of failed attacks listed in the router.
network name 2 doesn't usually show up with network name. Eeeevery once in a while it will connect to both, but more often it's just 2 and the neighbors.
I don't think mac does that, just windows. It did that before I reinstalled, which I figured would help, but nope, still does it.
Actually, that log's pretty good despite its appearance.
To completely rule it out, I'd like to know two bits of signal status: The SNR on the forward path (or downstream) The power level on the return path (or upstream)
Ok, that stuff couldn't possibly be better. It 100% isn't the modem, and I doubt it's your router's connection to it, given that this persists with multiple routers, but you have no problem with other networks.
I suspect one thing, but I haven't seen this issue since the days of Windows XP, so looking that crap up might take some time, if I can find it at all, and seeing if the solution can be applied to windows 7. And god only knows if that actually is the problem to begin with.