Modded PSU

so i took apart a computer power supply to use for electronics stuff (instead of using up billions of batterys)

so i know to turn it on you connect 14 to 15, its been working fine. but i decided to cut all the rest of the ATX wires, then once i did that i decided to go ahead and unsolder them. Now when i try to turn on the supply the fan twitches and then stops. what could have gone wrong??

Before switch on, connect minimum 1A load to 5V output. (50W car bulb is good)

check the solder places, you could have accidentally created a short circuit.