when i press the power button on my pc it starts then stops

E machine / E4026
March 10, 2012 at 13:41:28
Specs: Windows XP, 40g
when i press the power button on my pc it starts then stops i looked inside and i saw that the fans started then stopped

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March 10, 2012 at 13:46:44
Check the Power Supply is functioning correctly:


Googling is quicker than waiting for an answer....

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March 10, 2012 at 18:10:21
eMachines are notorious for using cheap Bestec power supplies that have a higher than average failure rate.

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March 10, 2012 at 19:57:10
emachines desktop computers usually have a BESTEC power supply.
BESTEC power supplies have a reputation of malfunctioning and failing a lot more often than average, and when they do that, they are a lot more likely than average to damage something else, especially when they fail completely, often the mboard.
A BESTEC power supply malfunctioning or failing is probably the NUMBER ONE REASON an emachines desktop system fails to boot normally !

If you DO have a BESTEC power supply, that's probably what is causing your problem.
If you remove it before it gets any worse and try a known good power supply with the system, if you are fortunate and the BESTEC power supply hasn't already damaged the mboard, the system will work fine.

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.

If you have a graphics card installed in a mboard slot....

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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