If you just recently updated your kernel, then try this link for a fix:
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If you just upgraded your kernel using apt-get upgrade, then try this link:
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At 29 lbs, I don't consider it a laptop.....

Oops. My mistake. Here's a link that should take you to where you can get the correct firmware file for your 6200 NIC.
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See this link for a firmware fix....

I had this very same problem when upgrading to the latest kernel. For some reason the firmware file for the wifi card gets erased during the upgrade. The file you need is called...

I had the same problem after upgrading. For some reason the firmware file for the 4965 card gets erased during the kernel upgrade. You have to manually copy it back to /lib/firmware
The file you...