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PC made a loud pop, saw flash of light, and shut down

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March 6, 2014 1:45:47 AM

I was laying in bed, and I heard a loud pop, then I saw a flash of light in the back of my computer, and it immediately shut down. It will no longer power on, and there was a slight burning/smoke smell at the time.

I have a feeling that my PSU is dead, BUT my webcam with built in LED lights is still on so I am confused.

PSU: EVGA NEX750 Bronze

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March 6, 2014 2:03:05 AM

Hi
Yes sounds like the PSU is dead,probably components on the 12V line fried as this uses the most power,5V line must be still ok if the LEDs are on.
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March 6, 2014 2:04:54 AM

most times it a cap that let go in the power supply. the unit 12v rail may have failed but not the 5v rail so some of the usb ports still have power. I would also check your video card and mb for any burn marks.
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March 6, 2014 9:20:15 AM

I checked the video card, and motherboard, they both seem fine, no burn marks/discoloration or blown capacitors. What are the chances this power supply killed another piece of hardware? I heard good PSU's hardly ever kill other pieces of software, but I'm not sure if that's true or not.
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March 6, 2014 11:15:28 AM

Hi
There is a small chance that the power surge associated with the PSU going down may have damaged something else,however the only way to find out is to fit another power supply,if its a decent new power supply then any damaged component will not damage it.
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March 22, 2014 3:42:16 AM

There are two +5V rails, one that operates only when the +12V also runs, another that's always on and is largely separate, the standby +5V. USB ports are usually configured to run off the latter, which explains your USB camera LED.

Power supply repair is dangerous and should be left only to the qualified, as opposed to the merely overconfident. The qualified can likely repair this for themselves rather cheaply.
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March 22, 2014 3:42:56 AM

There are two +5V rails, one that operates only when the +12V also runs, another that's always on and is largely separate, the standby +5V. USB ports are usually configured to run off the latter, which explains your USB camera LED.

Power supply repair is dangerous and should be left only to the qualified, as opposed to the merely overconfident.
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