Dead computer after system shutdown.
Selected shutdown from the window manager and the operating system
turned off the computer as usual. Tried to restart the computer from the
switch on the desktop box but it was totally dead.
Where to look for the failure? CPU, motherboard, power supply or
I never thought before about how the operating system shuts down the
computer. I know there are two wires from the power supply which the
desktop switch connects to turn on the power supply. How does the
operating system turn it off?