Most scariest thing that can happen to your computer is failure to turn on at all. You press the little power button and nothing happens. No beeps, clicks, clunks or whirs. Light on the monitor is on, but your computer is totally dead.
First of all don’t panic! When people face that kind of problem, they are tend to panic, worried that all important data on their device are gone. Most probably your documents and pictures are safe, just not accessible at the moment. This computer problem shows that one of the hardware components have failed.