Macbook built-in mic static

I've had my macbook for almost 2 years now and haven't really ever used the microphone function. Today i tried to record a video on a friend's facebook wall and the image showed up fine, but the audio was just a bunch of loud static. I then went to test it in photo booth and the same thing happened. I can barely hear myself talking under all the static. I have been into the sound preferences and have clicked an unclicked the "use ambient noise reduction" with no change. While in the sound preferences i did notice that the input level bar that moves when it traces sound was jumping wildly around even though the room around my was completely silent. please help me!

Sounds like you have a hardware issue in your sound circuit. The logic board may need to be replaced to fix it. Try this first though.
Reset your SMC and PRAM.
Resetting the System Management Controller >>
Dave M.
MacOSG Founder/Ambassador  An Apple User Group  iTunes: MacOSG Podcast
Macsimum News Associate Editor  Creator of 'Mac611 - Mobile Mac Support'

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brendan--
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Doc

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See https://discussions.apple.com/message/18712084#18712084
It's worth resetting the PRAM. See if any other posts there help too, there are a few in simlar posts in the 'More like this' sidebar on the right of the page…

Macbook built-in mic static

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