20" 2008 iMac keeps shutting down on its own [Archive]

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HE15MAN

Oct 4, 2009, 12:57 PM

This has happened about 6-7 times now in the last two weeks. Ran a quick and extended Apple hardware test on it and both came back fine. Also, changed the power outlet it was plugged into and still is happening randomly.

Any ideas?

Hellhammer

Oct 4, 2009, 01:19 PM

Sounds like a PSU issue. If you're under warranty, call to Apple

HE15MAN

Oct 4, 2009, 03:43 PM

PSU meaning?

richprice79

Oct 4, 2009, 04:57 PM

Wirelessly posted (iPhone : Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_1 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7C144 Safari/528.16)

Power supply unit my 2006 iMac started this a few weeks ago as well shortly after I installed
snow leopard. It hasn't done it in days though

txhockey9404

Oct 4, 2009, 05:15 PM

I had a similar problem with a 2007 Aluminum 20" iMac a year ago. Here (http://forums.macrumors.com/showthread.php?t=493105&highlight=imac+random+shutdown), you may want to search a bit more before posting a new thread.