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chscag

 
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Member Since: Jan 23, 2008
Location: Fort Worth, Texas
Posts: 39,107
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Mac Specs: 27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, 3 iPods, OS X Mavericks

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Quote:
How do I fix this?
It could be a bad or failing airport card. I've not seem them act like that though, usually it results in no WiFi reception or very weak reception.

When you boot to safe mode, the drivers for the airport card and other hardware are not loaded.

You might want to try a reinstall of Snow Leopard first before deciding on swapping out the airport card. There is a possibility that it's driver or software related.

Fortunately, an airport card for your MacBook is not expensive although it can be a task to replace. Go to iFixit: The free repair manual and look up your model MacBook. Find the replacement instructions for swapping out the airport card. The ifixit folks also sell them.

I can't be 100% sure that's your problem, but it'll get you started.
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