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Possible Faulty Power Supply?

Last response: in Systems
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April 7, 2013 9:46:19 PM

Hi, I finsished building my gaming pc about a week ago, it turned on displayed the no operating system text and everything worked great(I had turned the pc on and off multiple times). I just got Windows yesterday though (Windows 7 Ultimate). So I installed Windows and my Motherboard Drivers fine. I then restarted and installed my GPU drivers. I then turned my PC off, and then when I tried to turn it back on, it booted, then I heard a very loud BANG and it turned off. This tripped the power safety switch turning off the power in my bedroom. I flicked the safety switch back on and my room had power restored in my room. I then tried to turn the pc on and recieved no response at all. I have heard this is a problem with a faulty power supply? If anyone has any ideas what else this could be please let me know. (I have listed my specs below)
Thanks, Josh.
Memory: Corsair Vengeance LP 8GB (2x4GB) DDR3
CPU Cooler: CoolerMaster Hyper 212 EVO CPU Cooler
Case: Antec One Gaming Case
HDD: Seagate Barracuda 1TB
Motherboard: ASRock H77-PRO4-MVP
CPU: Intel Core i5 3470
GPU: MSI GeForce GTX 660 Twin Frozr III OC 2GB
Power Supply: Corsair CX-500 Modular 80+ Bronze Power Supply

More about : faulty power supply

a b ) Power supply
April 7, 2013 9:52:41 PM

Yeah it sounds like a faulty power supply
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April 7, 2013 9:54:14 PM

Was it hooked up to a surge protector?

If electricity is restored and the system will doesn't even light up then either the PSU or Mobo got fried it sounds like... I haven't experienced this personally so that is my 2 cents...

Only plug in the power cord and see if it wants to power up. If not then double check all your front panel connectors and case to motherboard connectors. Also verify your power connectors are ALL connected
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April 7, 2013 9:54:52 PM

Do you have a spare PSU to take out of another system to test really quick?
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Best solution

a b ) Power supply
April 7, 2013 9:54:58 PM

Ooh, yea that definitely sounds like a dead PSU. Something must have shorted inside the PSU, causing a massive power surge which then tripped the breaker. Just hope that the rest of your components are fine.

To test it if the PSU is outright dead (which I think it would be), disconnect everything from the PSU except for a fan or something else that will obviously turn on (an LED light or something). Grab the 24pin ATX cable and a paperclip. In the 24pin should be a green wire, and a multitude of black ones. Use the paperclip to connect the green pin with any of the black ones. If the PSU works, the fan (or whatever) should start spinning, if not its good ground for a dead PSU.

Image of the connectors in the 24pin if you want some reassurance
http://i286.photobucket.com/albums/ll98/gcarver2006/ATX...

To test if the PSU failing has fried your other components, there's nothing you can really do except sub in a PSU you know that works and hope for the best.
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April 7, 2013 9:56:47 PM

Ummmm...the only thing that could draw enough current to trip a local circuit breaker would be the power supply. If any other component was faulty...worst case scenario is that it might shut down or damage the power supply. But room power would be unaffected.

I'm amazed this happened with a Corsair unit. While most Corsair units are just above-average in quality, they pretty much all have proper protection circuits built in. There is no way a Corsair PSU should have tripped your circuit breaker.

But the evidence is pretty conclusive. Your PSU dunnit. Before you replace the PSU, you should run a check to see what else is on that circuit breaker. While it shouldn't matter that much...I have seen similar problems caused by a computer being that last component that pushes an electrical circuit into overload. If you have like an air conditioner or refrigerator or some other high current drain on the same circuit, it's possible that a voltage sag could have damaged the PSU. In that case, you'd have a nasty circular problem going on.

Good luck.
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a b ) Power supply
April 7, 2013 10:01:05 PM

And if you cannot return it, I would recommend my brand of choice, PC Power and Cooling
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April 7, 2013 10:02:03 PM

The bang is usually a capacitor exploding.
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April 7, 2013 10:05:33 PM

Hi, thanks everyone for the quick answers. I cannot test the PC with another Power supply as I don't have one. And I cannot test to see if the Power Supply I had is fully broken because I convinced myself it was and sent it back to be replaced with a new one. Ill admit I made a rookie mistake. I guess all I can do now is wait until I get the new power supply.
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April 7, 2013 10:06:45 PM

royalcrown said:
The bang is usually a capacitor exploding.

I have checked the motherboard and it has no blown capacitors. So i guess its a capacitor thats blown in the Power Supply?
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a b ) Power supply
April 7, 2013 10:08:15 PM

Nothing you could have done to stop that happening, you did everything right as far as I can tell.
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April 7, 2013 10:09:03 PM

davec80 said:
Ummmm...the only thing that could draw enough current to trip a local circuit breaker would be the power supply. If any other component was faulty...worst case scenario is that it might shut down or damage the power supply. But room power would be unaffected.

I'm amazed this happened with a Corsair unit. While most Corsair units are just above-average in quality, they pretty much all have proper protection circuits built in. There is no way a Corsair PSU should have tripped your circuit breaker.

But the evidence is pretty conclusive. Your PSU dunnit. Before you replace the PSU, you should run a check to see what else is on that circuit breaker. While it shouldn't matter that much...I have seen similar problems caused by a computer being that last component that pushes an electrical circuit into overload. If you have like an air conditioner or refrigerator or some other high current drain on the same circuit, it's possible that a voltage sag could have damaged the PSU. In that case, you'd have a nasty circular problem going on.

Good luck.

I believe its only my bedroom on the circuit, and all I have plugged in is a few chargers (laptop, iphone), an iPod dock and a fan.
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April 7, 2013 10:18:32 PM

Not a rookie mistake.

You did everything right.

Unless you are an IT consultant earning $120 an hour then I think we all need a little confirmation of issues (aka B.S.) which helps a lot.
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April 7, 2013 10:20:03 PM

Johno_ said:
royalcrown said:
The bang is usually a capacitor exploding.

I have checked the motherboard and it has no blown capacitors. So i guess its a capacitor thats blown in the Power Supply?


Probably. Those are the only components that usually make a firecracker type bang in a pc. Other components like mosfets don't really make noise when they melt down.

Also, when you get your power supply back, if your motherboard is screwy or anything seems wrong be sure to inform corsair. I read about a guy recently who had is corsair water cooler leak and get on his card. He said they replaced their stuff and the video card too without hassling him. Worth a shot if anything else seems damaged.
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April 7, 2013 10:21:16 PM

Interesting talk - I never knew about the banging noise... Good to know mobo's make a firecracker noise.
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April 7, 2013 10:29:44 PM

jackson1420 said:
Interesting talk - I never knew about the banging noise... Good to know mobo's make a firecracker noise.


It would be a capacitor specifically, and likely in the power supply. Power supplies still use electrolytic capacitors (juicy centers) instead of solid capacitors. Electrolytic capacitors can and do explode, although rarely. Now if you hook it up "backwards" aka reverse polarity, then it can explode on the spot.

http://www.youtube.com/watch?v=D-RZ5RTAdSg
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a b ) Power supply
April 7, 2013 10:33:04 PM

^ Watching that vid, as soon as it exploded the image of an old flintlock musket just popped into my head :lol: .
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April 7, 2013 10:39:06 PM

royalcrown said:
jackson1420 said:
Interesting talk - I never knew about the banging noise... Good to know mobo's make a firecracker noise.


It would be a capacitor specifically, and likely in the power supply. Power supplies still use electrolytic capacitors (juicy centers) instead of solid capacitors. Electrolytic capacitors can and do explode, although rarely. Now if you hook it up "backwards" aka reverse polarity, then it can explode on the spot.

http://www.youtube.com/watch?v=D-RZ5RTAdSg



That is an awesome explanation. Great video too thank you

Good to know
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April 7, 2013 10:40:03 PM

How do you know if motherboards have solid capacitors before ordering? Or do you just have to research the board itself?
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April 7, 2013 10:40:46 PM

Sure. Sciency stuff isn't ALWAYS dull...hehe
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April 7, 2013 10:45:48 PM

Hehe thank you for sharing the great knowledge.

I work with some very intelligent engineers & energy consultants in the Northwest and they always talk about interesting ideas and methods I would never of known. Listening to that kind of stuff is never dull to me - I just got stuck playing with computers :) 

Thanks again
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April 7, 2013 10:49:59 PM

Electricity is fun until you get to ALTERNATING CURRENT, then it's all MATH...yuck. Went for my AASET and that is when it got dull..DC FUN...AC...trigonometry, ALGEBRA, calculus...zzzz.
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April 7, 2013 10:52:49 PM

Hahaha - I can do math but I don't like to spend several hours.

Still makes me wish I studied that more but either way very good stuff
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April 8, 2013 5:29:14 PM

Hi, just an update, I have remembered that at the time of this happening the pc was plugged into a powerboard along with the monitor and a laptop charger. Im not sure but i thought this might have an impact with the powerboard not being able to handle the power or something along those lines?
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a b ) Power supply
April 8, 2013 5:33:48 PM

Nah, any decent powerboard will be able to handle the load fine.
I'v been running my PC and three monitors off the same power board for a fair while now, and power consumption wise were both about the same.
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April 11, 2013 10:44:55 PM

Just an update for anyone who cares, I got the replacement Power Supply today, have set it up in my PC and everything is working perfectly. Thanks everyone for your help!
Josh.
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May 2, 2013 4:48:11 PM

Happy to hear the power supply is operating correctly for you
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!