Question about HP Pavilion a450n PC Desktop

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My hp a500n will not turn on

My pc won't turn on. the switch won't light, but there is a green light flashing in the back. We recently had a power outage,but the computer worked after that. I have the side open and tried to follow similar fixes,by trying to unplug and plug in diff. components but the wire colors seem different from the explanation given please help

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  • 2 more comments 
  • annanicole1 Feb 14, 2009

    I tested the little flat battery and it seems to be working,but the pc isn't thanks

  • annanicole1 Feb 14, 2009

    is the memory the the card about 4.5 in long if it is yes i pulled it out and still nothing oh and the power supply is also ticking when i have it plugged in

  • annanicole1 Feb 14, 2009

    thanks for all your help I was thinking it was prob. going to be the psu thanks again

  • mr jacoma Mar 16, 2009

    My pc has been unplugged for 2 weeks.. now when i plug in the pc ..the blue light on the front panel doesn't come on at all, but a green light on the back of the pc starts flashing..also when i plug the power cord in the wall outlet it makes a little spark.I'm not sure if it's the power supply or the motherboard..


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Check your BIOS battery make sure it is working correctly and that it is not out. You can use a battery tester to see.

Posted on Feb 14, 2009

  • 2 more comments 
  • Jeremy Reddick
    Jeremy Reddick Feb 14, 2009

    I know that your PC isnt, but that battery can cause you problems. HAve you already tried to reset your memory by pulling it out puttung it back in?

  • Jeremy Reddick
    Jeremy Reddick Feb 14, 2009

    There are only two things that will cause your computer to turn on with a green light on the board. that is a bad motherboard or a bad powersupply.

  • Jeremy Reddick
    Jeremy Reddick Feb 14, 2009

    Ok well that is alot more helpful. You have blown your power supply. since it was cause by a power outage they will cover the price to replace it. If it was a brand new on then take it back and say it doesnt work. Makeing a ticking sound if very bad so you need to replace it.

  • Jeremy Reddick
    Jeremy Reddick Feb 14, 2009

    Not a problem please rate if you are satisfied and thank you for using


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