Question about HP Pavilion 520c PC Desktop

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Computer won't power up

My friend has a HP 520 N. We replaced the power supply but the unit will not power up. When you push the power (on/Off) button on the front of the computer, the processor fan begins to spin for about a second and then stops. Then nothing happens again unless you unplug the computer for a few minutes and plug it back in... then the same thing happens. I thought it was the on/off power switch and we replace it as well, but same result. What is wrong with this thing???

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  • daver7 May 21, 2009

    forgive me what is SMPS. The power supply is new... plenty big, 450 watts... more that the one we replace.

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  • 304 Answers

This happens sometimes due to SMPS failures. Try to change with other SMPS with same watts.

If it happens same then the problem with the board.

Try to consult a technition.

Thanks & Regards

Nanda Kishore

Posted on May 21, 2009

  • NANDAKISHORE
    NANDAKISHORE May 22, 2009

    Yes SMPS (SWITCH MODE POWER SUPPLY) it the power supply to the unit (motherboard).



    SMPS 450w ok. Try to replace it.

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