grimaldi.ashley.03

My Imac hasn't been turning on after a power surge from a blow-dryer. However the imac was plugged into a surge bar. I have read numerous reviews of this happening to people and someone said they talked to a worker at an apple store and he said that your computer goes into a locked state anywhere from 24-72 hours after. I just want to know if I should leave my computer unplugged or plugged in while I wait for it to decide when it wants to turn itself back on? Does this matter?! Any help would be appreciated :)