[SOLVED] Did I short circuit my psu?

[korzids]

I had a perfectly working pc a few hours ago. I decided to do some cable management, since it got quite messy.

I did the thing. Plugged everything back and turned on my pc. Nothing happens. I double checked all the connections outside and inside of the pc, tried multiple power cables and outlets. Still no sign of life.

Since I saw no other solution i tested the PSU. I detached everything from the motherboard and wired up the pwr_on and gnd pins to start the PSU. Then I measured voltages on the connectors using a multimeter.

24 pin power connector: Only the +5VSB pin outputs 5V as it should. Others (12v and 3.3v) output 0v.

CPU power connector: not working

PCIe connector: not working

I have a Corsair rm750x power supply.

Is there a chance I short circuited the PSU, when plugging it in? Why would that happen?

 

[Zdos123]

Try jumping the PSU, just plugging it back in shouldn't have shorted it, was it plugged in whilst you were cable managing , also that the modular cables are plugged into the PSU properly

 

[korzids]

Try jumping the PSU, just plugging it back in shouldn't have shorted it, was it plugged in whilst you were cable managing , also that the modular cables are plugged into the PSU properly

That's what I thought also. Nothing was plugged in while I was cable managing, so it was not damaged while I was doing cable management. I jumped the PSU for measuring the voltages on connectors and got the values I listed above.

 

[Zdos123]

Did the fan spin when you jumped it, also do you have any spare modular cables, did you discharge the PSU before working on it, by holding the Power button.