|Thank you all for responding. DPS 250LB is a server power supply, not propreitary to Dell, is manufactured by Delta Electronics.|
I have 10 units of these spare power supply that i wanted to use it for other gadget.
The power supply is a slot in type with slot in pins indicating PSON, PWOK, +5V , +12V.
in order to turn on the unit, i need to pull the PSON pin to ground and maintain PWOK pin at +5V, as i have read in some other forum. I did according to what i read but not able to get the power output. so i am blocked.