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Q: mid-2010 iMac making long beeping sound during use

My mid-2010 iMac recently started making long, high-pitched humming sounds at random--normally after it's been on for a while. I recorded the sound but can't  seem to attach it to this post.

 

Last night, it made a single, long, low-pitched beep (like an old Atari or something)--it is like the sound on this link, but it only does it once. https://www.youtube.com/watch?v=Zbmx_555fcE

 

Does anyone have any thoughts on what might be happening? 

 

Thanks!

 

Tony

iPad 2, iOS 5.1.1

Posted on Jan 27, 2016 5:39 AM

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