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Oops... I think I fried my PSU (rookie mistake)

Last response: in Components
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August 4, 2013 9:02:12 PM

So I was cleaning out my fans with some compressed air, and I noticed that on my power supply there was a 115V / 230V switch. My tired mind thought "More volts = more watts" so I flipped the switch, thinking nothing of it. Upon plugging my computer into the wall, I turned it on. When it first booted up, there was a loud hissing noise (which I dismissed, seeing as I have pretty low quality fans.), and after multiple seconds, I heard a pop, sparks came out of the PSU fans, and my computer shut down. Now, even with my switch on 115V, my computer will not turn on, and I'm worried other components might be broken. Can someone tell me if I need to replace anything?
a c 139 ) Power supply
August 4, 2013 9:13:13 PM

Won't know until ya replace the PSU.
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August 4, 2013 9:19:04 PM

Did you learn anything?
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August 4, 2013 9:23:12 PM

HerdOn said:
Did you learn anything?
The difference between volts and watts, and how regional power works.

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August 4, 2013 9:36:31 PM

JackNaylorPE said:
Won't know until ya replace the PSU.

So there's no way of knowing till I shell out the extra fourty?
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August 6, 2013 11:19:51 AM

you could take it to a local pc store that has a psu tester..
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a c 1194 ) Power supply
August 6, 2013 11:54:11 AM

Sparks don't fly out for no reason. What you've done is destroyed some electronic components within the PSU because they were running out of spec.
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a b ) Power supply
August 6, 2013 12:32:01 PM

Not enough voltage was provided to the PSU (only 1/2 of the required input voltage) and it blew, but unless it was crappy unit, nothing else should have been damaged.
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a c 1194 ) Power supply
August 6, 2013 12:40:08 PM

GhislainG said:
Not enough voltage was provided to the PSU (only 1/2 of the required input voltage) and it blew, but unless it was crappy unit, nothing else should have been damaged.


It may have been half the voltage but it would have been double the current. It's the excessive current that burns out components.
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a b ) Power supply
August 6, 2013 12:44:01 PM

The reverse could have been worse.
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a c 1194 ) Power supply
August 6, 2013 12:48:00 PM

It's a good thing that most modern PSU designs use automatic input voltage detection.

That little red voltage switch has killed its share of PSUs when users fiddled with it.
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