My power supply doesn't start: sleeved wires
Before turning it with green wire to ground, any ATX12 PSU must have the +5VSB (standby) voltage on as soon as it is connected to AC mains. This +5VSB comes on pin8 of the 20/24 pin connector. If there is no +5VSB, the PSU is broken, and won't start by green-to-ground short.