Please stop power cycling computers. This is not an acceptable operation (as Jamie already wrote before). When you don't know what to do besides power cycling the computer, just stop and do something else or call someone who knows more. Every time you kill the power to a computer you are taking a chance on damaging it or corrupting some hard drive.
In this case, the right thing to do would be to hook up the external keyboard and monitor directly to c1sus to diagnose things.
NO MORE TOUCHING THE POWER BUTTON.