This did nothing for me. There was no response from the psu or the fan. Is this a completely dead psu? If not, it's still in the rma process, so can't change that. I can't check all the other parts though, so I'll have to test other things once we get a new psu.
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Does sound like your power supply unit is defective. Complete the RMA.
If you're really anxious to find out now, use a power supply from another PC and plug the 24pin into motherboard and power cable for processor and see if any lights show up.
There was literally nothing. No clicking, nothing. It was a corsair cx600, supposedly a pretty reliable psu. Hopefully just a dud.