Loud pop in the emachine w3507

November 6, 2011 at 11:39:47
Specs: Windows Vista
There was a loud "pop" inside my emachine w3507. Now when I turn it on, a siren sounds, and then it turns off. I'm not sure what happened. Does anyone know what the problem may be?

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November 6, 2011 at 12:40:20
What you heard is probably an improperly made electrolytic capacitor that has exploded.
Your computer probably has a BESTEC power supply
They have a reputation for malfunctioning or failing completely a lot more often average, and they often damage something else when they do that, often the mboard.
The capacitor may have exploded inside the power supply, or on your mboard, or on a card plugged into the mboard. Wherever it has exploded, you will find tiny pieces of paper and aluminum foil and what's left of the aluminum metal cylinder for the capacitor, and two bare leads still soldered into the board where the capacitor used to be.

If you see nothing like that inside the case on the mboard or on a card installed in a slot, then try a power supply from a working system with your mboard - your computer MAY then work fine, or the BESTEC PS may have fried it.

In most cases the mboard used in an emachines system was not made by the same company that made the computer - Trigem, in Korea - usually they have a major mboard manufacturer's model in them that merely has an emchines bios version, and in that case, the mboard is not any more likely to fail than in other brand name or generic systems.

"Now when I turn it on, a siren sounds, and then it turns off."

Most modern mboards will shut off the mboard within a short time when the bios is detecting no rpm from the CPU fan header, and sometimes when that happens the mboard also produces a warning sound.

The CPU fan (that worked fine previously) not spinning can be caused by the PS being defective, or a lot less likely by the mboard having something on it that has become defective or damaged.

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November 6, 2011 at 13:20:00
More info

This is about bad capacitors on mboards but it also applies to anything they have been used on.

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.:

In this case, it's quite possible a defective BESTEC power supply could cause a good capacitor on the mboard or a card to explode.

If w3507 is a North American model, this excellent third party web site


says this is your mboard:

IntelĀ® D102GGC2 (Grant County2) Mainboard

It's a genuine made by Intel mboard with an emachines bios version.

The Intel web site has full support for the model.

The only thing you can't use on the Intel web site for your mboard without risking making your mboard fail to boot is the Intel bios updates.

IntelĀ® D102GGC2 Desktop Board (Home support page)

Some of the specific CPUs listed in the Intel CPU support list may not apply for your emachines bios version.


If your system DOES work fine with the power supply from a working system...

DO NOT BUY a BESTEC power supply !

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:

If you have a video card installed in a mboard slot that DID NOT come with the system, or if you think it's possible you may install one in the future....

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.

If you're a gamer...
In most if not all cases, the max capacity rating of the PS is an intermittent rating. It's recommended that you do not load your PS to any more that 80% of that rating if you are going to be using something that puts a constant load on it, such as playing a recent game for hours on end. In that case, you multiply the min capacity stated for the system with the particular video chipset on the card by 1.25 to find the min. capacity of the PS you should have.

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