HT4255: iMac (Mid 2010): Memory specifications
Learn about iMac (Mid 2010): Memory specifications
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Helpful answers
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Jun 12, 2012 11:04 AM in response to kathyjaby BDAqua,Hello, I can't imagine the removal problem, but see if these videos help...
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Jun 12, 2012 11:07 AM in response to kathyjaby John Galt,You have to pull very hard on the release tab. The first time I did it I thought it was going to break something.
I doubt that is the problem. Listen very carefully for any fan noise from the upper left. If you hear nothing at all, the power supply might have failed. Fortunately it is not terribly expensive to replace.