Computer pop sound, circuit breaker tripped

[honproplayer333]

My rig
I5 6600
Gigabyte ga H170-D3H
G.skill ripjaws v ddr4 ram
Seasonic g-550 modular psu(80+ gold)
No dedicated GPU, I'm using the integrated graphics on the CPU

I was using my computer when suddenly I heard a loud pop from the rig and the circuit breaker in my house tripped.

After doing much research online, my initial suspect was the psu.
I took caution and did not try to power the rig before determining the cause of the pop sound.

So I took out the psu and tried to determine if it was still functional by shorting the green to black pin . The fan was spinning and then I used a multimeter and measured all the DC voltages of all the pins on the 24 pin power connector.
I referred to the voltages in this site and they all tallied well within the tolerance range
https://www.lifewire.com/atx-24-pin-12v-power-supply-pinout-2624578

I then took apart the motherboard to inspect both side for any spoiled capacitor and all of them seem fine.
No burnt marks , no bulges ,nothing unusual.

I then reassemble the rig and booted the computer. It booted without any problem and I ran 30mins of furmark on it. Again nothing unusual.

I am worried about the loud pop that occurred am unsure of what caused it.


Could someone advise me on what I can do to determine the fault?
I have a gut feeling it's the psu that popped.
My psu is still under warranty and
if it i can conclusively decide that it is the problem , I could get it covered under the warranty.
Is there a more thorough way of determining that the psu is not spoilt besides the way I mentioned above?

 

[Barty1884]

It's possible you had a power surge (or similar) which, with a quality PSU, should take the brunt of it.

Were you connected to a power strip, surge protector or similar? Or connected directly to the wall?

If the motherboard doesn't show any obvious damage (and it shouldn't with a SeaSonic PSU), the chances are good the PSU absorbed the impact.
While it may function as intended right now, it may have "blown" the protection so, in the event of a repeat occurrence, any damage would likely skip the PSU straight to the motherboard/potentially other components*.

The only way to spot damage to it would be to open up the unit and look - which can be quite dangerous if you don't know what you're doing.


For peace of mind, personally, I'd replace the PSU.