power on only after pressing more times the power button
I had some power failure in my home but even if I have an UPS APC CS 500 my iMac powered off. Now when I try to power on my iMac I need to push more times the power botton before it goes on. I have an USB HUB that have a LED from which I can understand if there is tension.
The LED rapidly flash when I press the power button so it is as if the tension passed, and then went out quickly...only after many times the LED light on and iMac start.
What can I do?
My iMac is new (January 2013), thank you. Dario