New PSU shutting itself off after boot

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BOXY

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Old PC Power & Cooling PSU died with a loud bang (sounded like a firecracker going off). Replaced with new Seasonic Focus+ Gold 550W.

First time powering on, a few seconds after boot up it shut itself off. Pressed power button again and it came back on and stayed on. I rebooted a few more times after that but each boot up went fine and it didn't shut itself off again the rest of the day.

Next day, first time powering on, shut itself off a few seconds after boot, just like before, and just as before, stayed powered on without issues after subsequent rebooting.

This problem has not come back again since the first two days after installation. Was this some sort of "teething pains" or is it a sign of trouble down the road. I don't know whether I should return it or keep it. I have never had this sort of issue before with a new PSU. Thanks.

System specs:
Intel Core i3 using integrated graphics (no video card)
1 SSD
4 fans
no other peripherals attached to logic board
 
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Sounds like a short somewhere and the PSU is shutting down on overcurrent.

Sure that something else isn't broke and that's what casued the PSU to die with a bang?
 
Brian_B said:
Sounds like a short somewhere and the PSU is shutting down on overcurrent.

Sure that something else isn't broke and that's what casued the PSU to die with a bang?
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Thanks. I don't know enough about this stuff to diagnose a short. But everything seems to function normally on the PC. Not that that means anything.
 
Honestly, if I were you, I would pull the entire computer apart (safe to leave the CPU, HSF, and RAM installed on the motherboard) and look at all the wiring and how the motherboard was mounted.

I bet you find either something loose under the motherboard tray, or a power cable somewhere burned up. The fact that it's running fine now, I have seen both cables where they are shorting and finally just burn through and are ok for a while, and loose screws up under the motherbaord that finally roll around into a spot they aren't shorting anything out for a bit.

If there is one, it's usually pretty obvious - scorch marks or burned up cabling.
 
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Sniff that board after you pull it out. Sometimes there is a leftover burnt smell from toasted components on the board.

I would imagine that board is toast, it just hasn't completely died yet.
 
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OK sounds like you guys are explaining that the problem is more likely with the motherboard and not with the new PSU. I will proceed with due caution. Thanks! :happy:
 
That has to do with psu failure. If I were you i would put it under stress (heavy load), and if it shuts down, sounds weird like an electric component, or smells like burn, just RMA it right away.
 
FedericoUY said:
That has to do with psu failure. If I were you i would put it under stress (heavy load), and if it shuts down, sounds weird like an electric component, or smells like burn, just RMA it right away.
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It was my first impulse to return the new PSU. I got a Corsair PSU and was going to install that and return the Seasonic, but since everything seemed to be OK (after the first two days no more shutdowns) I haven't done that. Now, after the comments that it is more likely the motherboard, I'm not sure what to do. :unsure:
 
disconenct he psu form everythign adn turn int on with the clips ticke

if it still is brokne the psu is bad
 
BOXY said:
It was my first impulse to return the new PSU. I got a Corsair PSU and was going to install that and return the Seasonic, but since everything seemed to be OK (after the first two days no more shutdowns) I haven't done that. Now, after the comments that it is more likely the motherboard, I'm not sure what to do. :unsure:
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Try it out some more days then.
 
BOXY said:
It was my first impulse to return the new PSU. I got a Corsair PSU and was going to install that and return the Seasonic, but since everything seemed to be OK (after the first two days no more shutdowns) I haven't done that. Now, after the comments that it is more likely the motherboard, I'm not sure what to do. :unsure:
Click to expand...

If you still have the blown up PSU, if you open it and take a picture of the inside of it, we can see how it failed and if the failure mode was likely to cause any damage to system components. If something on the primary side failed, you're probably OK, but if something on the secondary side failed, it could be bad berries.

SvenBent said:
disconenct he psu form everythign adn turn int on with the clips ticke

if it still is brokne the psu is bad
Click to expand...

This really doesn't tell you anything other than the PSU works well enough to spin the internal cooling fan.

A whole battery of tests would need to be performed, like voltage and ripple under various loads.
 
GiGaBiTe said:
If you still have the blown up PSU, if you open it and take a picture of the inside of it, we can see how it failed and if the failure mode was likely to cause any damage to system components. If something on the primary side failed, you're probably OK, but if something on the secondary side failed, it could be bad berries.



This really doesn't tell you anything other than the PSU works well enough to spin the internal cooling fan.

A whole battery of tests would need to be performed, like voltage and ripple under various loads.
Click to expand...

Right so exactly like i said it can test if the psu is bad.
In what way in any shape or form did i imply this test would indicate if a PSU is good?
 
GiGaBiTe said:
Your post was almost completely illegible. Were you drunk or something?
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If you couldn't read it, why did you then assume you understood it enough to comment on what I wrote?
Do you often react on information you don't understand by assuming/guessing instead?
 
SvenBent said:
If you couldn't read it, why did you then assume you understood it enough to comment on what I wrote?
Do you often react on information you don't understand by assuming/guessing instead?
Click to expand...

Don't PUI if you get angry people can't read your illegible mess.
 
TheFlayedMan said:
Maybe when the old PSU went bang it took out the motherboard?
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It's always a possibility, the failure mode of the PSU will determine how likely it was to have damaged the motherboard. If the primary side blew up, it's less likely to have caused damage since the transformers isolate the mains from the secondary side. If the secondary side blew up (which is less common in my experience) then the chances of damaging attached peripherals are high. The motherboard and graphics card usually take the brunt of the damage and most everything else survives unscathed.
 
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