The power switch on a computer works by completing a circuit that provides power to the motherboard and other components. When the switch is pressed, it sends a signal to the power supply unit (PSU) to provide power to the motherboard, which then sends signals to other components to power on. The power switch is connected to the motherboard via a cable and is typically located on the front or top panel of the computer case. When the switch is in the "off" position, it breaks the circuit and prevents power from reaching the components. When it is in the "on" position, it completes the circuit and allows power to flow through the computer, enabling it to function.
