How to I restart my iMac 27-inch desktop after a power intrerruption?

I inadvertantly pulled the power cord from my 27-inch iMac and now cannot seem to restart the computer.  Is there any procedure that I need to follow to get it to restart?  I'm going through a power regulator that smooths the voltage signal, siubce I work from a home office.

Well, Ralph, I did what I should have done initially and read the ENTIRE SMC information that you provided the link to.  It has worked and I am a happy man!!!  Thanks very much.  Sorry for not being as thorough as I should have been before I sent my initial reply.  Heads up, everyone: read the entire section/info page before being a jerk like I was!!!

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