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Old Jan 21, 2013, 12:29 PM   #1
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Join Date: Nov 2012
2012 iMac still on, even when shut down?

when i shut down the new 2012 imac. i still hear a electrical current /frequency inside of it. the same frequency sound it makes when it is on. if i unplug it from the wall outlet, it stops of course. it also stops when its been turned off for several hours...also i do have a external usb 3.0 hd plugged in at all times, But when i unplug it, noise is still there...any thoughts? thanks.

note: the electrical buzzing noise is present whether computer is on or off, just as long as it is plugged in.

Last edited by PavelT; Feb 10, 2013 at 08:52 PM.
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