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crwdns2934241:0crwdne2934241:0 lemerise

crwdns2934249:0crwdne2934249:0:

You'll have to open the MacBook and check the microphone cable connections to the logic board and to the iSight camera. Here's a replacement kit you can buy for cheap if the cable is damaged:

http://cgi.ebay.com/MacBook-A1181-13-3-iSight-Web-Camera-WebCam-Microphone-/200453288057?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item2eabf27079#ht_1405wt_810

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open