|The idea on a forum like this is that you ask a question and someone answers it so that everyone can see the answer. That is how knowledge is spread around to everyone.|
There is no reason why a power outage should prevent a computer from booting unless the hard disk was in the middle of doing something at the time and the file system is corrupt. Or the power outage was proceeded by a current surge which sometimes happens.
In order to get any answer we need to know exactly what happened. Do you see anything on the screen, do you get any error messages.