Small spark in PSU

kingsmidgens · May 30, 2018

Got a new PSU set up in my computer, and noticed a small blueish spark inside of it when turning the io switch on, for the second time.

I figured this could be normal but I'd like to be sure as I've never noticed anything like that before.

Not sure if there was a spark the first time, or I just wasn't paying attention.

No noise, smell, or smoke produced that I could tell.

FWIW, the power button did nothing, when I noticed the spark, I stopped troubleshooting as beginner Google searches point towards faulty PSU, though my issue doesn't seem as severe as the results I found.

Thoughts?

Edit: seems like it would be relevant that it's a Cooler Master mpx-6501-AMAAB 650w, the PSU I'm replacing was 600w.

jay32267 · May 30, 2018

I think that there is a good chance that what is happening is normal. There is a possibility that the contacts on the on/off switch are somewhat exposed and when you turn it on you see the initial arc.

It's a good sign that you don't smell anything.

Although....what did you mean by this?>>>" the power button did nothing, when I noticed the spark"

kingsmidgens · May 30, 2018

The IO switch toggle was when I noticed a little flash of light, the power button to turn on the PC did nothing. My guess is that a component isn't seated properly, but I stopped troubleshooting since I wasn't sure if the power supply was safe to keep trying to use.

Basically-

Turned on the PSU, didn't notice anything (may not have been looking in the back)

Pressed the PC power button, nothing happened

Switched the PSU again, making sure it was toggled on - noticed the spark

Not thinking anything of it at the time, tried the PC again and no power.

Realized while troubleshooting reseating components that the spark may have been unusual, sought advice.

jay32267 · May 30, 2018

What are you calling the IO switch?

kingsmidgens · May 30, 2018

The 1/0 or on/off switch on the PSU.

I noticed it right when setting it to the on position.

Gam3r01 · May 30, 2018

If you are seeing any sort of arcing in a PSU, new or old, you need to replace it.
If its under warranty, get an RMA. If its not, get a quality unit.

jay32267 · May 31, 2018

So in other words....when you flip the i/o switch you see a spark inside the PSU. Is this spark at the switch or somewhere else in the PSU?

....and your power button doesn't work at all ever?

kingsmidgens · Jun 8, 2018

Sorry for the delay- it was in the middle of the PSU itself, didn't arc.

Nothing happened when I tried to power on the PC, but a component may be unseated (looks like one probably is) but I stopped troubleshooting to ask this question to make sure it's ok to continue.

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