Loosing internet connection every 15 minutes

I am "loosing" my internet connection every 15 minutes. The cable box was replaced. Internet sharing is off. The firewall is on and no ports are checked. But, every 15 minutes, I get a message (using Safari) that there is no connection. I select network diagnostics and after I go through a few steps, all the buttons are green and then the connection works. This is very problematic, though, since I am loosing work while working online. Any suggestions?

Hi otobinchicago,
The fact is you can delete the .plist (com.apple.networkConfig.plist) and re-enter your setting and you will find out if this is the problem, but as I can assure you I have been through the same process. Reconfiguring the computer, the modem, etc, and it was the hardware.
You could try taking your computer to a friends house linking it to their modem and testing it that way. As long as the post-computer to ISP link is nothing to do with your hardware, you will see that it could be hardware or software.
My bet is that it is hardware. It sounds too similar to what I had.

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Loosing internet connection every 15 minutes

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