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Doesnt switch on

When switching on ,no light,computer wont start,power light is lit,also makes buzzing sound

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  • gjohn47 Sep 29, 2008

    trytodoit
    thanks for reply
    it is not beeps,but a buzzing sound

  • gjohn47 Sep 29, 2008

    hi trytodoit
    took pc to repair shop,it was dust in black box in back of power supply,fixed ,new black box fitted
    many thanks for trying to help
    gjohn47

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You said buzzing sound is this more like a beep? Beeping sound are indicative of any number of diagnosable issues, depending on the actual number of beeps and the type of motherboard.

Posted on Sep 28, 2008

  • J. May Sep 29, 2008

    It is hard to say what is going on. I have heard cooling fans buzz when they are going out. If the computer is not working I would look toward the power supply possibly having gone out. I am not sure if you are comfortable in replacing it, but if you had an extra one (or could borrow one) than I would suggest that you change it out to test. You can hook up the bare minimum components (motherboard, hard drive, case fan) to the test power supply just to check the system out without actually installing the power supply. I have actually placed two computers side by side and hooked one power supply up to the other computer to test, without actually installing any parts.



    Also, there are power supply testers on the market where you just plug them into the power supply, but I have never used one so I am not sure about these. You could simply use a multimeter to do the same thing.



    I did some additional research and there are reports that on Compaq laptops the AC adapter can go out and making a buzzing sound. I am not sure if this applies to your situation.

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