Question about HP Pavilion a705w PC Desktop

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Computer won't come on

My computer won't come on . There is a light above the power plug on the back that is flashing, and the power button on the front also flashes around the edges. what is wrong and how can i fix it?

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  • taniamarie23 Dec 17, 2008

    My computer will not turn on ever since a recent power outage, but there is a small green light flashing on the back of the computer. There is no light coming from the power button on the front though. A friend said to get a new power supply?

  • vaehej Jan 10, 2009

    I've also had this problem to occur with my HP Pavilion a705w Desktop. After a recent power outage, my PC would not power on. The power indicator on the back of the computer is flashing green and the power button on the front flashes, but will not initiate a powered connection. I've read that I may need to replace my power supply. Any instructions on how to do this properly?

  • edmos70 Mar 26, 2009

    I am experencing somewhat the same problem except no power outage or spike, i shutdown and unplugged my pc to move it, about 1 week later i plugged it in and now its flashing.  is it possible for the power supply to just go out while not in use? 

  • boxerdude Apr 06, 2009

    my hp pavilion a410n computer wont start up, we put a new 500gb dr in it and a new power supply but it still wont work.

  • Ronald Edward
    Ronald Edward May 04, 2009

    its the mother board had it go bad on 2 of the same pcs something to do with bad caps. must replace motherboard

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I had the same problem, I unplugged my computer to move it before it had fully powered down. It wouldn’t start and all I got was the flashing lights.

I asked a friend who suggested I remove the power to the motherboard then reinsert it while it’s hot. Here’s what I did. Unplug the computer. Touch something metal so you’re grounded and don’t create a static shock on the motherboard. Now GENTLY pull the 16pin wire harness off the motherboard. Now plug the computer power cord back in. Then GENTLY plug the motherboard back in. With any luck the fan will start up and the computer will begin booting up. It seems to be some type of problem where the power supply doesn’t recognize the motherboard so it doesn’t do anything until it “sees it”? Probably some type of a safety to prevent motherboard burnout?

Posted on May 26, 2009

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New motherboard

Posted on May 04, 2009

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If there is a light flashing on both the back of the power supply and the power button that that definitly means that your power supply is faulty and/or there is some cord loose or malfunctioning so the best thing you can do is just replace the power supply and/or call customer service and have them suggest the best power supply for your system. if you dont know how to replace your power supply or even take apart your computer, message me here the name and model number of the computer and you can go into a live chat with me or another expert on this site about how to go about dissasembling your computer and replacing your power supply correctly.

Posted on Oct 20, 2008

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Replace memory stick

Posted on Sep 06, 2011

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Posted on Jan 02, 2017

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