Instead of using switch, we can use our Mouse left click for Powering on our Computer:

Minimum requirement:

Your mother board must be ATX.
ATX case Award Bios or any Bios that supports PS/2 Mouse Power On,
To activate this feature:

v Restart your computer.

v Then press Del when the BIOS message appears to enter your CMOS configuration.

v Select Integrated Peripherals from main menu.

v If PS/2 mouse power on disabled, activate it by press page up/ page down key it will became Double-Click.

v Press Esc key to exit.

v Press F10 to save and exit Power off your PC.

v Now double-click the left mouse button, Your PC will turn on.