You should need to press your Mac's power button only once in order to turn it on. After doing this, you should hear the boot chimes, then see it load OS X, and drop you to the log-in window. However, what do you do if this doesn't happen, and you neither see nor hear any activity from the system?
If this should happen to you, there are several things you can do before taking your system in for servicing.
First, check for a proper power source. If your system does not have a battery, test the wall outlet … Read more