Is PS_ON high or low?, Details

Bench Power Supply Using a Computer's Power Supply

Printer Power Question

Power supply from ATX PSU - General Electronics - Arduino Forum

Project, 3D Shutdown

PS_ON function using SSR and 5V and 24V PS

ATX to GPIO: 3V3 or 5VSB or PS_ON? (PSUControl) - Plugins - OctoPrint Community Forum

Test your power supply with a multi meter

EZ-ATX Workbench Power Supply Part 1 - DIYODE Magazine

Wiring the Power Supply

Easily access power from an ATX power supply in your DIN rail setup with the 24/20-pin ATX DC Power Supply DIN Mount Breakout Board from PMD Way. , ,

24/20-pin ATX DC Power Supply DIN Mount Breakout Board

power supply - Does an ATX PSU's PS_ON Signal Require Resistance - Electrical Engineering Stack Exchange

PS_on signal low voltage

Computer Power supply not powering when connecting power pin to the ground - Electrical Engineering Stack Exchange