Just add a like resistor to the second supply you want to modify. That should do it. If you are unsure of the resistor value just lift one leg of the resistor on the modified supply and measure it.

Ron

That resistor just tricks the supply so it will turn on. Its 560 ohm. My problem is figuring out what the black square thing is between the possitive and negative and what could it be doing? I have a hand full of these supplies already that work by adding the resistor on the left at 12.4 volts.

 

My problem is figuring out what the black square thing is between the positive and negative and what could it be doing?

But you still haven't told us what is written on it.

 

That resistor just tricks the supply so it will turn on. Its 560 ohm. My problem is figuring out what the black square thing is between the possitive and negative and what could it be doing? I have a hand full of these supplies already that work by adding the resistor on the left at 12.4 volts.

Ah, so they are just for the PWR_ON. My guess is they somewhere in there have a sense circuit for the output. Haven't a clue where though.

Ron

 

But you still haven't told us what is written on it.

The picture I posted is all I have. I dont know whats written on it