The PC Boot Process explained - Windows XP

@ 2006/06/20
The power supply performs a self-test. When all voltages and current levels are acceptable, the supply indicates that the power is stable and sends the Power Good signal to the processor. The time from switch-on to Power Good is usually between .1 and .5 seconds.
Comment from Sidney @ 2006/06/20
An army working behind the start up process

 

reply