Generally, a PC power supply (like many switch mode power supplies)
needs a minimum load to work properly. What happens is that without
external load the output voltage rises and sets off the overvoltage
trip. Try a 10 ohm 10W resistor on the between the 5V output and GND
(this is a 2.5W load), and that may prevent it from shutting down.

As far as I know, shorting wires together won't help.

Regards,
Don Peat,
don@central.co.nz

PS. Now about all those kiwi jokes...



Peter Shoebridge wrote:

>  I know this has been up here before but.... There is a way to fool a
> PC power supply to work without plugging it into a motherboard. If I
> remember, it involves shorting two wires, it's just which two. Any
> ideas would be great. Many thanks Peter Shoebridge