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Seasonic PSU 860W almost DoA?

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Yesterday I had this new desktop PC built by a technician - I'm gonna put the specs (bought separately) below. The machine was running for some minutes, and a little bit after windows got installed (and the guy left, lol) , I turned it off and next time I'm trying, I can't turn it on anymore. This Surge Protector I was using (sort of an old one) won't work anymore.
Then I tried to plug my computer direcly to the outlet (110V), nothing again. I also checked the power lights/LEDs on the PSU - not turning on either.
Is there any chance something else other than a Dead PSU is the cause of this?

Specs:

Intel i7 3930k
ASUS P9X79 DELUXE
Sapphire Radeon HD 7750
HD WD 1TB Caviar Green
Corsair Vengeance 3x4GB (I bought 4, but one of them was causing blue screen)
Crucial 128GB M4 SSD
Corsair Hydro-series H100 Cooler

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Power supply Expert

Power cord?

Did you open the case and look at the motherboard. That motherboard has some LEDs that light up when it is getting power. I don't recall an LED on the PSU itself, so I'm not sure what you're looking at.
Power supply Authority

Temile said:
I don't recall an LED on the PSU itself, so I'm not sure what you're looking at.

Some PSUs have a 5VSB LED but those are rare and would be redundant since nearly all motherboards have one of their own.

Another silly thing to verify is the PSUs hard-switch and possibly the 115/230V switch if applicable.
Power supply Expert

InvalidError said:
Some PSUs have a 5VSB LED but those are rare and would be redundant since nearly all motherboards have one of their own.

Another silly thing to verify is the PSUs hard-switch and possibly the 115/230V switch if applicable.


Yeah, but I have that psu and I don't remember an LED. Doesn't mean it isn't there...haven't looked at it lately.

Temile said:
Yeah, but I have that psu and I don't remember an LED. Doesn't mean it isn't there...haven't looked at it lately.


Yeah, I meant the Mobo LEDs, my bad. the PSU doesn't have any leds or anything. I tried the paper clip test on the PSU, didn't work as well.

InvalidError,
this PSU is Full-Range, there is no Voltage Switch.

hairystuff said:
It might be worth checking the front button and led panel connections, sometime people don't push the connection down far enough.


Seems firm enough. And I mean, the 1st time it shut down was 0,5 second after turning it on (The Cooler with the Blue LED e.g. worked for a second before it shut down forever). I'm having a bad time finding another PC to try it just to be 100% sure. If I don't till monday, I'm sending it back to the retailer to get it checked and use the warranty for a new one.

Best solution

Power supply Authority

You could do a PSU stand-alone power-on test by disconnecting everything except Molex fans from it and then shorting the soft-on wire (green) on the ATX20/24 connector to ground. If the PSU is at least not completely shot, the fans should spin up.

If you still get no reaction, the PSU might have blown its fuse.

InvalidError said:
You could do a PSU stand-alone power-on test by disconnecting everything except Molex fans from it and then shorting the soft-on wire (green) on the ATX20/24 connector to ground. If the PSU is at least not completely shot, the fans should spin up.

If you still get no reaction, the PSU might have blown its fuse.


Like the paper clip test works the same way? I left the Mobo (20/24) and CPU pins on the PSU, removed the Mobo end of the 20/24, and shortened it with a small paper clip on the green and black cables (4th and 6th or 7th pin). Nothing happened - PSU remained dead, as did the fans.

I guess that's it for now then. Thanks for the help guys (New here!)
I should return it on Monday and wait for a new one - let's hope none of the other PC components got damaged and the fixed PSU will make this baby work.
Power supply Expert

You had a decent branded psu with plenty of protection so your components should be good, the only time I've ever had components burn is when extreme amounts of humidity where involved

After all, it was a bad PSU. I proceeded to the RMA, and the new one should arrive today. They didn't have the same model, so I got a 760W instead (also Seasonic, 80 Gold). Since I'm using just a 'soft' Video Card, that 760W should be enough for my configuration, even OC'ing it.

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