I have an ATX power supply from and old PC and want to convert it to a 12V 5V and 3V bench supply to run a charger to power up lipos etc. I have connected all the 12V 5V and 3V and -Ve cables together and connected the green cable to ground.
When I first just connected the green wire to ground with all the computer plugs still connected to the leads but unplugged from the computer the unit worked fine. The fan was running and all seemed OK. Now that I have removed the plugs ends and have all the cables grouped together with the white and purple are left not connected to anything, all that happens is the fan spins up for a fraction of second and stops. There is no 12V 5V and 3V at the terminals.
What am I doing or have done wrong?
Many thanks Steve
When I first just connected the green wire to ground with all the computer plugs still connected to the leads but unplugged from the computer the unit worked fine. The fan was running and all seemed OK. Now that I have removed the plugs ends and have all the cables grouped together with the white and purple are left not connected to anything, all that happens is the fan spins up for a fraction of second and stops. There is no 12V 5V and 3V at the terminals.
What am I doing or have done wrong?
Many thanks Steve