24 inch makes sound when turned off

When my iMac 24 inch is turned off he keeps making a little sound, as if a small ventilator keeps running. Even after a couple of hours turned of (cooled down) the sound (very soft) is still present.
The only time this sound dissapears is when the computer is turned on and normally running.
Is this normal, does anyone else have this?
Please reply to [email protected]

You've posted to the CRT iMac forum. You probably meant to post to the Intel iMac forum:
http://discussions.apple.com/category.jspa?categoryID=189

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