I can't get my Mac to turn on? Our power went out and it is now unresponsive.

I can't get my Mac to turn on? Our power went out and it is now unresponsive.  I have tried the usual way to power it up but am not getting anything. Does it need to be reset? 

Which Mac model?
When you say not getting anything - do you mean no sounds, beeps, etc?
It is possible that your Mac's motherboard or power supply are damaged.
Check this (read through the symptoms first):
http://support.apple.com/kb/HT3964

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