I think my PSU might be faulty

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hoozah

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Jun 27, 2013
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I just bought parts to build a new PC and I put it together the first time and nothing happened when I turned it on (except power light on MOBO) so I retried today and same thing. I took the parts out from the case and tried again with just the mobo, ram, psu and cpu and again nothing happened. I figured it might be the PSU so I tried the paper clip trick and the fan did like half of a rotation then stopped. Does this mean I have a faulty PSU? I don't have a spare one to try the new parts with.

edit: The PSU is a corsair hx750w.
 
Solution
batmanbob
Just double check all wire and hard ware connections... something being loose would cause this problem, most commonly ram wasnt pushed down all the way to the click on both ends or the processor wasnt set right. Make sure all your processor pins are straight, IF they arnt Ive had luck straightening them with a needle.
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clutchc

clutchc

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Apr 22, 2009
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While the paper clip trick just starts the PSU, you still need to test the output with a voltmeter or PSU tester to know if it is supplying the proper voltage. But since you say the PSU fan starts and then stops, it appears there MIGHT be a problem with it. Odd because the Corsair is a pretty good PSU.

That model isn't the kind that the fan doesn't run until the temp calls for it... is it? I think it might be. Some have a thermal switch that turns on the fan only when needed.
 
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hoozah

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Jun 27, 2013
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I just connected my HD to the PSU while doing the paper clip trick and the HD turned on. I then tried to do it through the MOBO but nothing happened. Could this be an issue with my MOBO instead of PSU? The psu fan still doesn't turn on, but it definitely gives power to the mobo (power light on mobo is red) and HD.
 
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clutchc

clutchc

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Apr 22, 2009
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That verifies my thought that the PSU is of the design that the fan only runs when needed. Yes, I would tend to think the MB is the problem. If breadboarding it like you did using the onboard video didn't allow you to boot to BIOS, I would RMA the board.
 
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chriss000

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Feb 24, 2010
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These guys are more experienced than me, but I am of the thought that a hi end supply like that. . If it still works in your old system why look logic in the face and assume the problem isnt with the new gear?
Its surely more likely the problem lies there.
 
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hoozah

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Jun 27, 2013
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I had a laptop before this. All these parts are brand new, having just received them yesterday.

CASE ANTEC|NINE HUNDRED BK RT
MB ASUS|Z87-PRO LGA 1150 R
VGA EVGA|02G-P4-2774-KR GTX770 2GD5
PSU CORSAIR| HX750 750W RT
CPU INTEL|CORE I7 4770K 3.5G 4C 8M
MEM 4Gx2|GSKILL F3-14900CL9D-8GBSR




 
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batmanbob

batmanbob

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Jun 27, 2013
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Just double check all wire and hard ware connections... something being loose would cause this problem, most commonly ram wasnt pushed down all the way to the click on both ends or the processor wasnt set right. Make sure all your processor pins are straight, IF they arnt Ive had luck straightening them with a needle.
 
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