Computer powers up but never starts-help?

Discussion in 'Windows Desktop Systems' started by Bigjohnc, Jun 24, 2007.

  1. Bigjohnc

    Bigjohnc OSNN One Post Wonder

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    I have a Compaq Presario that all of sudden will not start up. When I turn the power on it acts like it will start, the keyboard/mouse lights flash and go out, then the computer just keeps running but does not kick in.
    The only thing I could think of was overheating but it was running fine when shut down a couple of days ago.

    Any help would be greatly appreciated.
    Thanks
     
  2. Bigjohnc

    Bigjohnc OSNN One Post Wonder

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    Which forum to post in?

    Dumb question but I am new here and I have a general troubleshooting question - my computer does not start up - which forum is best for posting this question in?

    Thanks
     
    Last edited by a moderator: Jun 24, 2007
  3. canadian_divx

    canadian_divx Canadian_divx

    does anything come on the screen?
     
  4. canadian_divx

    canadian_divx Canadian_divx

    probably general hardware would be the best one.

    also if you were looking at the main circuit board, the motherboard. do you know what you are looking for the different components or more of just a software user.

    most common when i have seen this issue there devices on the motherboard called capacitors and they will bulge and leak over time. they can cause lack or or irregular power on the board therefor not have the system post.

    also when the system beeps when it starts up. that means it has completed power on self test P.O.S.T LOL so that peep means its in working order.

    does it beep at all?
     
  5. Sazar

    Sazar F@H - Is it in you? Staff Member Political User Folding Team

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    I would suggest simply disconnecting ANY devices with memory, flash or otherwise, that you have connected and you should be fine.

    Let us know if that works.
     
  6. canadian_divx

    canadian_divx Canadian_divx

    bah totally forgot about USB boot off flash drive. LOL
     
  7. Sazar

    Sazar F@H - Is it in you? Staff Member Political User Folding Team

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    It's ok, I joined the site 2 months before you. I am more l33t :smoker:
     
  8. Sazar

    Sazar F@H - Is it in you? Staff Member Political User Folding Team

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    Is the input setting correct on the display?

    i.e. if it is a dvi signal, is that the correct set item for your display?

    I don't know what display you have, I have 5 options on my display.
     
  9. falconguard

    falconguard Carbon based lifeform Political User Folding Team

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    are you getting any beeping after boot?
     
  10. canadian_divx

    canadian_divx Canadian_divx

    from what im gathering the board is not posting at all. so hardware issue inside the computer, umm best bet if u can pop of the side of the case and look for anyuthing burnt or the smell of burnt plastic.
    also look for these things on the board.

    http://www.fozzilinymoo.org/Fozzolog/images/20020419-bad_board.640x480.jpg

    http://www.pavelec.net/adam/CapsCrop.sized.jpg

    the tubes (capacitors), they should be flat. its common of them to go bad. they will budge or leak or just blow off LOL. if those pics look like anything on your board then bad news.
    also do you have any replacement parts kicking around? mainly like a video card or ram that is compatible with your computer, if so swap them out and see if it works
     
  11. Bigjohnc

    Bigjohnc OSNN One Post Wonder

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    No beeping - I also opened the side up and cannot see anything that is burnt or any capacitors that are blown. Nothing at all looks out of place.
     
  12. falconguard

    falconguard Carbon based lifeform Political User Folding Team

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    Alright leave the case off and powerup the comp. When you do there should be a light on the motherboard, that goes on. If the light goes on, then the notherboard is getting power, if there is no light then we can check the PSU.
     
  13. dreamliner77

    dreamliner77 The Analog Kid

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    I think your power supply is shot. It's giving enough juice to start booting and then peters out.
     
  14. Bigjohnc

    Bigjohnc OSNN One Post Wonder

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    Your right no light on the motherboard - is it the power supply?
     
  15. Bigjohnc

    Bigjohnc OSNN One Post Wonder

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    Maybe I just need more cowbell?
     
  16. falconguard

    falconguard Carbon based lifeform Political User Folding Team

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    I have to agree with Dreamliner,, sounds like the power supply
    supply.
     
  17. Bigjohnc

    Bigjohnc OSNN One Post Wonder

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    Well my new power supply finally showed up - after I plugged it all in the light on the PS blinks and the computer does not even power up now. did I get a bad PS? Why is this light blinking while the old one even stayed solid?
     
  18. dai

    dai OSNN Junior Addict

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    try a cmos reset
     
  19. Bigjohnc

    Bigjohnc OSNN One Post Wonder

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    OK back to square one, I replaced the power supply and did the CMOS reset. Still when I turn it on the fans power up but nothing else works. when I plug in the keyboard the power light flashes but does not stay on.
     
  20. Dark Atheist

    Dark Atheist Moderator Political User Folding Team

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    remove all cards from the system even the video card, and try and power it up, if you hear beeping its more than likely its telling you that theres no video card in there and cannot complete the post, should this happen its your video card thats shot, somtimes the pc sees it then it dont, thats why it might past the test but dont have enought strength to put a picture out