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Can't connect after waking from sleep

Submitted by Sylvia on 16/May/2009
76.20.46.155

Message:

Hi, all.

After about 8 months of flawless performance, I now have trouble connecting to the internet almost every time the computer wakes from sleep.

What happens: Firefox, already running, can't connect to any site.

I am using Firefox 3.0.10 on my iMac (OS 10.5.6).

My internet provider is Comcast.

I have a Comcast-supplied RCA modem, model DCM425C.


What does not work:
-- Only turning off and on the modem.
-- Only unplugging and replugging the modem power.
-- Only restarting the iMac.


What does work:
-- Turning the iMac off (shutting down) and on + unplugging and replugging the modem power.


I think this started about the time I dragged all my son's Halo files to the trash and emptied it. But I could be wrong.

Please tell me how to troubleshoot this.

Many thanks!

Sylvia

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