PSU needs to be fiddled with before pc can power on

[sahando]

Components

MB - Asus RIVE
GPU - 2X Nvidia GTX 680
CPU - I7 3960X
RAM - 32GB 8x4gb
PSU - Seasonic 1250w Gold

Problem - My psu wont power on after hiting the start button on the case, or the start button on the motherboard, Leaving the PSU powered off for awhile will allow me to boot using either of the buttons. (this leads me to think of overcharged capacitor problems)

However, playing around with the powerswitch of the PSU (balancing between of and on, will sometimes cause a static sound and if done right, the PC will power on.) And playing around with removing and reinserting the powercord in to the PSU will do the same thing, a Static sound and then a powering on of the PSU (this occurs if the power button on the PC was recently hit).

This is the second seasonic PSU that has had this fate in the past year in my build, i went out and purchased a new to replace the old one that had a similar fate (required long periods of no-load before it would power on).

I have a feeling it could be overcharged capacitors, but what would cause that? could it be a bad ground? i have a feeling that might be an issue aswell, i have no idea. Anyone delt with a similar problem?

Update: I also wanted to add, that when the computer is up and running there are 0 issues, the computer runs fun, performs perfect under stress tests. its only booting back up after a shutdown or powerless that is a problem.

 

[terry4536]

It sounds like you are having a PSU thermal reset issue.

 

[skit75]

I've seen motherboards that trigger a protective circuit which appears as the same symptom as the overcharged capacitor issue. The "fix" is also the same in that you need to bleed the caps by removing the AC cord and power cycling the Power button a few times, then plug in the AC cord and it's fine. Poke around your motherboard BIOS and see if you can find a thermal protection or over-voltage/regulator monitoring protection circuit to disable.

 

[sahando]

@Terry4536
Are there any solutions to this issue? or a way to test it if that is what it is?
@skit75
i will have a look in the Bios now, cheers.

 

[terry4536]

Make sure that the PSU fan is running. Make sure that the psu vent on the case isn't occluded.
You can by or borrow a PSU tester.

 

[sahando]

Make sure that the PSU fan is running. Make sure that the psu vent on the case isn't occluded.
You can by or borrow a PSU tester.

PSU is well ventilated, fan runs no problem.
Update: I also wanted to add, that when the computer is up and running there are 0 issues, the computer runs fine, performs perfect under stress tests. its only booting back up after a shutdown or powerless that is a problem.

Also testing my PSU with my other computer results in the same issue.

 

[terry4536]

Next time this happens, unplug it and wait 30 seconds. Then put your hand on top of the PSU, if it is hot you have your answer.