Question Computer has made a loud pop with 2 PSU's

[Lladnekkrub]

Basically I was laying in bed last night when my computer made a loud pop and shutdown. I could not get it to turn back on it being late at night I said I'd figure it out tomorrow. So I unplugged the computer and moved it to a clearer location did a bunch of Googleing and found that it sounds like a blown capacitor in either the motherboard or PSU I looked at the capacitors in the motherboard and nothing seemed to be out of place so I figured the PSU was the issue luckily I had a extra one from my old PC so I did a quick switch around and tried to turn the computer on then another loud pop happened and nothing again so that is 2 PSU I have tried and 2 pops and I am stomped and don't know what the issue could be!

 

[kanewolf]

A shorted USB device. A shorted SATA device or a shorted motherboard. What changed BEFORE the pops?

 

[Lladnekkrub]

A shorted USB device. A shorted SATA device or a shorted motherboard. What changed BEFORE the pops?

The second pop there wasn't any USB devices plugged in. And how would I go about checking for these shorts?

 

[kanewolf]

The second pop there wasn't any USB devices plugged in. And how would I go about checking for these shorts?

There is no easy way to test. Did ANYTHING change before the first blown power supply? New card, moved the unit, spilled ice tea, etc???

 

[SkyNetRising]

Full hardware specs of the system?
Model names of PSUs used?

 

[Lladnekkrub]

There is no easy way to test. Did ANYTHING change before the first blown power supply? New card, moved the unit, spilled ice tea, etc???

No nothing at all same hardware and in the same spot as it has been for months!

 

[Lladnekkrub]

Full hardware specs of the system?
Model names of PSUs used?

I can't give you exact specs as I don't remember but it's got a i7, GeForce gtx 980, 16 gigs of ripjaw memory! Asus 797 - E motherbaord, corsair liquid cooler and 2 tb hardrive with a 250 gig sad! The first psu was a nzxt 700w HALE82 V2, the second was a evga 750w GQ

 

[kanewolf]

No nothing at all same hardware and in the same spot as it has been for months!

Then the first failed power supply may have damaged the motherboard and that caused the second failure. No easy way to test this.

 

[kanewolf]

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No nothing at all same hardware and in the same spot as it has been for months!

Have you checked your mains voltage? I have seen situations where the mains voltage was out-of-spec. Usually there are other symptoms when this is the case.

 

[Lladnekkrub]

Then the first failed power supply may have damaged the motherboard and that caused the second failure. No easy way to test this.

What would you say my next step would be?

 

[Lladnekkrub]

[

Have you checked your mains voltage? I have seen situations where the mains voltage was out-of-spec. Usually there are other symptoms when this is the case.

How would I go about checking that!

 

[kanewolf]

How would I go about checking that!

You will have to have some kind of volt meter. If you are uncomfortable checking it, you probably need to enlist some help.

 

[Lladnekkrub]

You will have to have some kind of volt meter. If you are uncomfortable checking it, you probably need to enlist some help.

So update I got a PSU tester in to test out my power supplies 1 seems to be working 1 does not but the one that doesn't is the one that was for the first pop and its also the one I opened up to see if a capacitor blew so maybe a screwed something up when I opened it but I didn't think I did! So what should be the plan now that one PSU is working but my machine isn't turning on and there was 2 pops

 

[Lladnekkrub]

You will have to have some kind of volt meter. If you are uncomfortable checking it, you probably need to enlist some help.

Another update make sure you read the one above I took the PSU that was working And plugged in the 25 pin and the CPU 8 pin connector and hit the power button the CPU fired up along with the some fans and the graphics card light which I couldn't get to work before. So now do I try and plug stuff in 1 at a time and see if things work or is that a bad idea in case of another poping situation?