Question about Compaq Presario 5000 PC Desktop

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No power in the pc

My hp pc was working fine. then suddenly power went out. now i can't turn the power back on. i push on the power switch. but nothing happens. what could be the problem? if i switch the power switch. would that solve the problem?

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  • thmidan Dec 23, 2008

    i took the power supply out and tested it. it was in good shape and nothing wrong with it. could it be that the on/off switch it self is out of comession?

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Unfortunately, your Power Supply Unit (PSU) is probably dead. When the power comes back on,  it is often accompanied by a power surge. This can quite often destroy your power supply. To replace this, unless you have experience doing so, I would suggest taking it into a PC repair centre, as power supply are serious business, and installing one incorrectly, or installing an incorrect unit, can cause further damage to the computer.

Posted on Dec 22, 2008

  • ryantmer Dec 23, 2008

    It is possible that the switch is dead, although quite unlikely. It seems that, if the power supply is fine, it may be your motherboard or processor that was fried in the surge. PSUs are supposed to protect against this, but they don't always do so, especially with cheaper and OEM power supplies. If you are able, try taking out the processor and test it in another board. Do the same with the RAM, actually, it can cause all sorts of strange problems. If not, you may have a dead board. Interestingly, this exact problem happened on my home computer not two weeks ago (power outage and all), and it ended up being the board that was toast (Dell system, so crappy power supply).


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It does sound like the power supply. Try flipping the power swich in the back, by the cord, then press the power button on the front again. But most likely, the power supply will need to be replace. If you do happen to get it come back on, take the cover off and verify the CPU fan is spinning, if it's not, that could be the problem as well.

Posted on Dec 22, 2008

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