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Solved: Computer Doesn't Boot and...

Discussion in 'Hardware' started by TheShooter93, Dec 27, 2012.

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  1. TheShooter93

    TheShooter93 Malware Specialist Thread Starter

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    Cody
    Hello TSG,

    I'm working on a computer which, upon my attempt to boot, only the processor fan spins and a constant beeping sounds.

    We've tested the 24-pin power connector with a multimeter and all the voltages except one are exactly what they should be (the purple wire is slightly over the voltage the PSU says it should be).

    I've also tested the RAM and I still can't get it to boot.

    The main power button doesn't work either, so I have to turn the PSU on and off to get all of this to happen.

    Does anyone have further ideas? Something screams power supply to me, but the multimeter checks it out.
     
  2. crjdriver

    crjdriver Moderator

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    A multimeter is next to useless unless you are putting the pw supply under a load. You posted that the pw button does not work. If you are switching the pw supply ON with the switch in the back of the pw supply, the mb still should test the "pw good signal" before switching ON. Simply moving the switch on the back of the pw supply should not do anything until the pw switch pins on the board are jumped or closed with the pw button.

    If it is powering on without you jumping the pins, I would suspect the board has a problem.
     
  3. DaveBurnett

    DaveBurnett Account Closed

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    The frequency and number of beeps means something. Count them and report them here.
     
  4. TheShooter93

    TheShooter93 Malware Specialist Thread Starter

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    I know about the importance of the frequency of the beeps, but they would go on forever if I let them, so there isn't anything about them I can report, sorry. No real pattern other than about a second in between each beep and it continues for as long as the power supply is switched on.

    It sounds more like an alarm for incorrect voltage or temperature problems.

    Also, I'm not exactly sure what you mean by "jumping the pins", but here's what I'm doing: Regardless of the state of the power button in the front of the computer, when I turn on the PSU using the switch on it, the processor fan turns on and the indicator LED in the motherboard is green.

    Having said that, this only happens once every few times I turn on the power supply. The other times nothing will happen, or fans start to spin then die.

    Hopefully that information is of some help. Thanks for your help guys. (y)
     
  5. dai

    dai

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    check the beep code here

    www.bioscentral.com

    what are you running
    video card brand and model
    cpu
    m/board
    ram
    power supply
    brand
    model
    wattage

    check the listings in the bios for 12v line voltages and temperatures and post them
     
  6. crjdriver

    crjdriver Moderator

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    Pull the lead off of the pw switch pins on the mb. Now either plug in the pw supply or switch it ON. Does the system attempt to pw ON now?
     
  7. crjdriver

    crjdriver Moderator

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    I will be off for the night and I will check this in the morning. Good luck.
     
  8. TheShooter93

    TheShooter93 Malware Specialist Thread Starter

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    Hey crjdriver,

    Thanks for the help. The owner of the computer decided to take it to a shop to have them test an alternate power supply and troubleshoot further.

    If I get my hands on the system again soon I will post the results from your desired test.
     
  9. TheShooter93

    TheShooter93 Malware Specialist Thread Starter

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    Update:

    The diagnostic test said both the power supply and the motherboard are fried.

    Will be getting a new tower.

    Thanks everyone for the help. (y)
     
  10. dai

    dai

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    not good news but at least you know what was the problem
     
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