Question about HP Pavilion A820n (PP165AA) PC Desktop

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Computer wont turn on

My hp pavilion a820n desktop wont turn back on after a power outage. there is a blinking green light on the back just under the power cord. tried other outlets. called hp support and went through steps that included unplugging the harness on the motherboard and hard driive, holding power button for three minutes and switching to the 230v for 10 minutes. no joy. any suggestions?

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  • pvalentine10 May 29, 2009

    havent tried the battery, but will do so. the fan does nothing when plugged up, but there is a ticking sound with the blinking light. ticking sound is in the area where the power supply is.

  • pvalentine10 May 29, 2009

    tried the battery but still nothing. same blinking light and ticking noise. i will take it to someone tommorrow to see if it's the power supply. thanks for any and all info. i will post whatever i find out.

  • pvalentine10 Jun 04, 2009

    well, it turned out to be the power supply. i took it to a local guy and he diagnosed it for me. i decided that it was time to upgrade computers(mines almost 5 years old) so i'm having him build me a new one. thanks for all the help and comments. i did learn a thing or two here.

  • Sdrabor May 11, 2010

    When the power is turned on to the computer, do you get any fan movement or other lights besides the one coming on by the power cable?

  • Tualiapz
    Tualiapz May 11, 2010

    Have you tried taking out the bios battery (small flat type) from the motherboard?


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I had the same problem its going to be your power supply it probably burned out. when i changed mine it worked perfectly.

Posted on Jun 01, 2009

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If nothing else turns on besides that first light on the outside, that along with the ticking noise makes me thing that the problem is with your power supply. If you call a small local PC repair shop (if you have one where you live), many of them have the ability to plug in another power supply and can tell you in 5 minutes whether it's the power supply or not, and can sell you a new one on the spot for a decent price.

Posted on May 29, 2009

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Taking out the battery resets the settings on the bios for the motherboard.

worked for me on the few computers that wont turn on.

If it starts up, you may need to enter dates etc onto the bios.

Posted on May 29, 2009

  • Tualiapz
    Tualiapz May 29, 2009

    I never thought of the power supply unit till i saw Sdrabor comments. I think he is on the right track considering it happened after a power outage.


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