Question about Compaq Evo D500 PC Desktop

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Coolmaster 500w power supply

I put the coolmaster 500w power supply in the compaq and nothing happens. Its as though there is not electricity getting to the motherboard.

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First check, using a voltmeter, to see if your power supply is working. Secondly, if it is, then reseat your boards and check all connections (internal and external) and try again. Lastly it could be as simple as the on switch is broken. By shorting the pins on the board where the on switch connects you can by pass this to determine if it is the switich. This should reveal your problem. Tango.

Posted on Feb 05, 2008

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Nothing happens when push start button. power cord etc good ??? is this a power unit failure?


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unplug the tower from the outlet & then replug it in & see what happens

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then if nothing happens after you push the start button, power supply & cord could be bad

the same thing happened to my daughter's pc & had to replace power supply & shorted out the motherboard

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My problem may be a bad processor or mother motherboard,I keep blowing out power supplies. any idea?


usually the parts are some what associated a lot PSU>motherboard, if your power supply got busted due to a possible power surge then there is chance that the motherboard might be affected to. try having a UPS it will help a lot esp during power surges..

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POWER SUPPLY PROBLOMS!!!!!!!!


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Need to change out the power supply..just open the case to get the wattage should be around 500W, then go to online computer store for new one..easy to install just a couple of screws..but heres a tip, if you have a digital camera take a picture of where all the wires go on the motherboard before you unplug them..not good some are 12V, 5V and 3.3V, wrong socket and you gonna be buying a new motherboard too...good luck..pls rate this solution.

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1 Answer

Wont turn on


If you press the power button and nothing happens, most likely you will need a new power supply.  If all the fans and whatnot come on when you press the power button, but you get no video, I would remove the RAM from the motherboard, and see if you get video.  If you are still getting no video, but the fans are all coming on, there is still a slight chance that it is your power supply, but most likely your motherboard.

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Sounds like the power supply or motherboard is biting the dust. U may consider power off, open case and clean out the dirt, check U'r connections and if the power supply smells, replace it.
Else replace the pc. When the power supply dies, it usually stresses the motherboard out and it dies later, sooner.

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