[SOLVED] Turning on Mobo outside of case and BIOS flashback.

Feb 15, 2021
I have an Asus Tuf x570 Pro Wifi and I want to build outside the case to check for any issues. The mobo doesn't have a power button, but I've been told I can jump the board by placing a screwdriver between the power + and - pins. Is this true? I also wanted to know how to safely turn the board off. I'm guessing I just flip the psu button off?

My next question is about using Bios flashback. Asus has a video on how to do it, but I wanted to know if I can do it by just having the psu connected and nothing else. To clarify, I go through the normal process, but the CPU isn't connected, just the psu to the mobo.