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chscag

 
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Member Since: Jan 23, 2008
Location: Fort Worth, Texas
Posts: 38,828
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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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The lack of response by the genius bar is likely because they have no experience working with older Macs. Take our word for it and replace the power supply. The speakers are not very likely to cause that popping sound.
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