Is my PSU dead? (after 3 days of normal use)

wiwh404 · Dec 3, 2017

I have a brand new Seasonic Prime Titanium 750 watts that has been powering flowlessly my system the last 3 days.

As I came from work, I pressed on the power button and heard what could have been a discharge. Anyways, the computer would not start anymore.

The MB led is on, but pressing the power button doesn't do anything. In particular, the fans don't turn, and of course there is no POST.

What I did to troubleshoot/diagnose:
- take out everything that is not necessary to post, i.e. I kept only PSU, the ram sticks, CPU and CPU fan. Still, nothing happens when I hit the power button.
- Shorted the power pins (to check whether the power button itself was at fault). Nothing happened.
- Cleared the CMOS. Didn't help.
- Rebuild the system on another MOBO. Cleared CMOS. To no avail.

- Took the PSU out by itself, did the paperclip test with an external fan connected. The fans (neither the PSU fan -- with PSU hybdrid mode off -- nor the molex fan would turn).

Do I have a faulty unit? This seems extremely unlikely, as this is a very high end with supposedly top notch QC and all, and that it worked flawlessly until now, but everything seems to point out to that.

Ideas?

jankerson · Dec 3, 2017

system specs?

The Prime Series fans don't turn until it gets warm enough to spin.

But the MB is getting power.

jankerson · Dec 3, 2017

What happened to your OLD PSU?

Have you tried that or another PSU?

wiwh404 · Dec 3, 2017

jankerson :

The Prime Series fans do turn on if the hybrid mode is off. Just to be sure, I did plug in a molex fan that would turn on by shunting the PSU.

So here is what I did:

1 - Turn off hybrid mode
2 - Connect an external fan to a molex cable pluged
3 - Turned on the PSU
4 - Did the paperclip test (as in http://www.corsair.com/~/media/corsair/faqs/psu%20paper%20clip%20test%205.png?la=en-eu)

Fans did not spin.

I re-iterated the whole procedure by switching order of points 3 and 4.

Fans did not spin.

I mean, there is maybe 1 chance in 10000 that a PSU of that caliber would fail within the first 5 hours of usage.

wiwh404 · Dec 3, 2017

jankerson :

Unfortunately I don't have any old PSU available. I need to decide whether I should RMA this unit, which is a costly process, especially if they then discover that the unit is not faulty (I would then lose half its value in transport costs and testing). So I wanna make sure that this was the part that failed.

I should indeed find another PSU and try powering on the PC, thanks for the input. -- was just hoping I could make sure that this failed, I'm kind of eager to get the PC back together

jankerson · Dec 3, 2017

YOUR MB is getting power if the lights are on.

I would try another PSU 1st as it is very doubtful the PSU went that fast, especially that one. But it does have a 15 year warranty.

wiwh404 · Dec 3, 2017

jankerson :

Yes my MB was getting *some* power (i.e., its led turned on).

Is a failed paperclip test a definite answer that the PSU is dead? (whether it be able to light a single MB led).

jankerson · Dec 3, 2017

wiwh404 :

jankerson :

Yes my MB was getting *some* power (i.e., its led turned on).

Is a failed paperclip test a definite answer that the PSU is dead? (whether it be able to light a single MB led).

No, it's not.

Zerk2012 · Dec 3, 2017

wiwh404 :

If you hooked up a molex fan to the power supply and did the paperclip test and the fan did not spin yes DEAD PSU. (as long as the fan actually works and did not spin)
The paperclip test can tell you if your PSU is bad but it can't tell you if it is good.
A PSU of any quality can fail just like any other electrical item.

Zerk2012 · Dec 3, 2017

jankerson :

With the Molex fan attached and not working the paperclip test proved the PSU was bad as long as the fan actually works to begin with.

wiwh404 · Dec 3, 2017

Zerk2012 :

So I seem to have a bad PSU, unless I did something wrong with the paperclip test.

Thanks for your help.

Search

Is my PSU dead? (after 3 days of normal use)

wiwh404

Prominent

Zerk2012

jankerson

Judicious

jankerson

Judicious

wiwh404

Prominent

wiwh404

Prominent

jankerson

Judicious

wiwh404

Prominent

jankerson

Judicious

Zerk2012

Titan

Zerk2012

Titan

wiwh404

Prominent

TRENDING THREADS

Latest posts

Moderators online

Share this page