Power Supply BLEW UP!

May 18, 2012 at 21:24:54
Specs: Windows 7, i7/4gb DDR3
Hey everyone, so I'm gonna try to make this as short as possible.... and I think I know what may have caused it.

So basically my Internet router kept shutting off by itself, restarting etc... so I called a technician. The guy told me to plug the router power cable to the wall outlet, saying that may have been the problem. So what I did was, I moved the power bar cable from the first outlet, to the second outlet.

Started up the computer... everything was fine... was listening to music I think (not sure) and then boom... computer shut off. It sounded like the sounds were coming from the power supply.

So I unplugged the PSU.... plugged it back in, but the computer doesn't want to start. But I still see a blue light on the motherboard (power light or something) but the computer doesn't wanna turn on...

So, do you guys think that my video card or anything else may have been effected?

Please let me know...thanks!

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May 19, 2012 at 05:35:30
If moving the power strip/surge protector (it should be at least a surge protector, a UPS would be much better) from one outlet to another outlet (assuming everything was turned off or removed) caused a problem in your power supply, I would suspect a problem in the outlet or the electrical circuit. Get it tested for ground fault and reverse connection (hot/neutral) professionally.
If a component in the power supply did blow (capacitor or other component) then it is possible for the motherboard, video card, or other component to be effected. The only way to tell for sure would be to replace the power supply and test the system.
A power supply has at least 3 main busses with different voltages, since the problem could be on any of these or on the primary side, the light on the motherboard does not mean anything (you may be getting 3.3V & 5 V but not 12V, etc.). I would not leave the power supply plugged in since it is possible that you are getting higher than normal voltage on any of the working busses and that can still cause damage.

You have to be a little bit crazy to keep you from going insane.

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May 19, 2012 at 06:11:33
Please post the make/model/wattage of your power supply, in fact, post your complete system specs in detail. It's difficult to provide an answer when we have no idea of the hardware you're working with. However, if the power supply did in fact "blow up", there's no way of knowing which other hardware was damaged until you test it.

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May 19, 2012 at 11:38:59
I don't know why they suggested it. They may have heard some things that suggest you need a professional electrician to look at your home's wiring.

Replace the psu, be careful in any case. Fire, and electrocution hazards exist.

Hang up and live.

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Related Solutions

May 19, 2012 at 11:58:26
It's NOT normal for the router to shut off and restart.

Has there been a power failure event since the last time your router and computer worked properly ? A power failure event can cause power spikes or power surges or both that can damage anything connected to the computer. If it was caused by a lightning strike, that can cause damage even when the computer and everything connected to the computer that connects to AC power directly or via a AC to DC adapter is plugged into something that protects against power spikes and surges.

A power failure event could account for both your router and power supply having been damaged.

Power supplies can develop failing electrolytic capacitors over time. In some cases, the failing capacitor will EXPLODE. El-cheapo power supplies are a lot more likely to have the problem.

If the noise you heard truly did come from the power supply, if you remove the power supply and remove it's cover, you'll probably find tiny pieces of a capacitor that has exploded and two wires sticking up from the board where the capacitor once was.

If you see that, or if you see that any capacitor shows signs that it is failing (see the last part of this post) your power supply has failed, or is in the process of failing.

Failing power supplies are common and can cause your symptoms.
Check your PS.
They often partially work, fans and hard drives may spin, leds may come on, yet you may get no video and the mboard will not boot all the way.
See response 4 in this:

"So, do you guys think that my video card or anything else may have been effected?"

Sometimes a failing power supply damages something else while failing, sometimes it doesn't. El-cheapo power supplies are more likely to damage something else. Probably most often just the mboard is damaged, but anything connected to the mboard can be damaged. Some PS brands such as BESTEC are well known to be a lot more likely to damage something else.

Before you buy a power supply.....
If you can borrow a power supply from another working computer, try connecting that.

If that doesn't help, something has been damaged. You may want to buy a whole new system

If it is failing, you can usually replace it with any decent quality standard sized standard ATX PS with the same capacity or greater.

Standard (PS/2) power supply size - 86mm high, 150mm wide, 140mm deep, or 3 3/8" h x 5 7/8" w x 5 1/2" d , or very close to that, though the depth can be more or less for some PSs.

Don't buy an el-cheapo (in quality) PS.
See response 3 in this:

I no longer recommend Cooler Master, AOpen, or Sparkle power supplies.
I'm now downgrading Thermaltake to middle of the road.
Antec has two lines of PSs - the better line has a longer warranty for the same or similar capacity - the other line is more towards middle of the road.
AMD has a list of Certified (tested and found to be good quality) PSs:

Your power supply must have at least the minimum capacity required to support a system with the graphics card you are using installed, or the max graphics card you might install in the future.
(Onboard video - video built into the mboard - IS NOT A CARD ! )
If that info is not in the ad for the video card, you can go to the video card maker's web site and look up the specs for the model - often under system requirements - the minimum PS wattage, and, more important, the minimum amperage the PS must supply at 12v is stated. If you don't find that, any card with the same video chipset including any letters after the model number has very similar minimum PS requirements. Some power supplies have two or more +12v ratings - in that case, add those ratings to determine the total +12v current capacity.

The following is about the same problem on mboards - the same applies to the board inside a power supply, and can also apply to other electronic boards such as on a card in a mboard slot.

Some mboards develop this problem - electrolytic capacitors were installed on them that were not properly made, and they fail eventually - the mboard manufacturer didn't know they were improperly made at the time the mboard was made.

Open up your case and examine the mboard to see if you have bad capacitors, and/or other findable signs of mboard damage .

What to look for, mboard symptoms, example pictures:
Home page that site
- what the problem is caused by
- he says there are STILL bad capacitors on more recent mboards.

Pictures of blown capacitors, other components, power supplies, fried Athlon cpus, etc.:

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