Something that has been asked many times. How do I power on my ATX PSU? Having a ON/OFF switch on the back of the unit is not enough. What needs to happen is 20/24 PIN ATX connector's PS_ON# wire needs to be grounded to switch it on. How do do that? There are two ways:   1. Using the 'paperclip trick' to turn on the ATX PSU Connectiong PS_ON (green) to COM (black) o