Power off the computer using the designated shutdown method.
Power off the computer using the designated shutdown method.
You're assembling the PC on a MOBO box and need to know how to power it off without using Windows or the PSU switch. You mentioned you're looking for a method that doesn't require a PC with Windows installed. Since you have an MSI B550 MORTAR, consider using the built-in power button or a USB-powered shutdown if available. If not, check if your motherboard supports a direct power button or a USB controller for shutdown.
It only connects the pins together, which is why you just need to connect them again to stop it. Some boards let it happen when you touch them, while others require you to hold it for a moment.