According to technical documentation and multimeter testing, the 8-pin female receptacle (viewed head-on with the clip at the bottom) typically follows this configuration: Pin Number Wire Color (Internal) Remote + (Sense/Reserved) 2 3 4 5 Remote (Signal/Power On) 6 Ground (GND) 7 Ground (GND) 8 Ground (GND) Operational Note: "Power On" Mechanism Go to product viewer dialog for this item.
Whether you are repairing a vintage Optiplex, building an arcade cabinet power supply, or converting it for a test bench, memorize this guide: Dell D220p 01 Power Supply Pinout 2
When the power supply is plugged in but not "on," the LED on the brick is typically Orange (Standby). Once Pin 5 and Pin 6 are shorted, the LED should turn Green , indicating that 12V is now present on Pins 1, 2, and 3. building an arcade cabinet power supply