Why does my computer keep dying?

My computer keeps turning off on its own...

Before the hardware turns off it makes a strong motor sound and then shuts off.

Why? and how should i fix it??

Thank you!

4 Answers

  • 1 decade ago
    Favorite Answer

    Is the computer dirty inside?

    A quick look at the back of the computer, and viewing the power supply fan, will reveal this. If so, buy a couple of cans of compressed air for computers, and clean the power supply fan, and surrounding cage.

    (Computer unplugged from electricity. Work on a table. Touch the metal frame of the computer case, to relieve your body of static. Static will silently fry out your computer components! )

    Then open the computer case, and clean it out. Pay special attention to the processor fan, and heatsink. (DON'T spin the processor fan too fast! It is designed to only spin so fast. Spin it faster than it was designed for, and you can cause premature failure of the fan bearing!)

    Two other things can cause a computer to 'die'.

    The above can cause these things, (Dirty computer), but not necessarily so.

    1.Your power supply may have a weak voltage rail. This is caused by an Electrolytic Capacitor, or more than one, getting weak.

    'Caps' inside a computer are used for two things. They are either a filter, or a voltage regulator. Inside the power supply they are a filter.

    They help make the rectified DC current into a true, clean, DC current.

    If one, or more go down, a voltage rail, (Or more than one voltage rail), can be weak.

    Voltage rails inside a Psu (Power Supply Unit) are 3.3 volts, 5 volts, and 12 volts. (The 3.3 volt rail is starting to fade away. More and more computers are not using it)

    An Electrolytic Capacitor is made up of three strips. A conductor of thin aluminum metal, in a strip (Like thinner than aluminum foil) with an insulating coating is applied to it. A second strip is made up of paper, and it is soaked in an Electrolytic solution. Then a third strip is simply just thin aluminum metal. The three strips are rolled up together, (Tightly) with the two metal strips on the outside, and the paper strip on the inside.

    These are inserted into an aluminum 'can'.

    The ones we see in computers have two leads. They come out of the bottom of the capacitor. (One lead connects to the thin metal foil with an insulating coating on it. The other lead connects to the thin metal foil with no coating on it. One is Positive. One is Negative)

    Eventually the Electrolytic Paste on the paper strip, loses some of it's chemical properties. It starts developing a gas. This gas expands the aluminum 'can', and the paste starts oozing out. When a certain level of paste has oozed out, the capacitor can't do it's job to the fullest extent. When the level goes past this, the capacitor fails.

    This causes a power supply to develop a weak voltage rail, and as the capacitor/s get weaker, the power supply does also. Eventually the capacitor/s fail, and the power supply falls flat on it's face!

    (There were/are some of causes of capacitor failure.


    2.Capacitors on the motherboard act as voltage regulators.

    Ones around the expansion slots getting weak, or going out, may or may not cause havoc right away.

    These is because they are in a Series Circuit. One capacitor fails, not much of a problem. Two fail? Things starting getting 'funny'. But these are for expansion slots, and whatever is in the slot. PCI, AGP, and PCI-Express, are examples of expansion slots.

    The ones (Capacitors) to be concerned with, are the ones surrounding the processor. These are voltage regulators for the processor. The processor requires a steady, clean, supply of electricity. It has a very small, tight, voltage tolerance. It can't vary very much.

    IF just one 'cap' starts going bad, the processor might shut off. As the capacitor charge builds up, the processor turns back on. When this 'cap' goes bad, the processor turns off, and won't turn back on.

    (The BIOS program regulates turning the processor on and off. If the processor gets too hot, the negative value of the voltage changes, and the BIOS program shuts the processor off. Keeps the processor from burning up. If the positive value changes too much, the BIOS program turns the processor off. Keeps the processor from running in an undervoltage state. Undervoltage can cause resistance. Resistance causes heat. Time to turn the processor off.

    Short answer?

    Check the capacitors surrounding the processor.

    (Vid on YouTube, demonstrating bad caps on a motherboard, around the processor.http://www.youtube.com/watch?v=KN6_-8fYHo0

    Youtube thumbnail

    &feature=related {Despise this guy's voice! lol!)

    Then check your power supply by replacing it with a known good power supply, if you don't have bad caps on the motherboard. See if there's a power supply you can borrow to test this.

    Edit: The strong motor sound is your harddrive. It's 'trippin' out', because the Operating System begins to start, then the processor turns off, and the operating system is in a 'loop'.

    Going over and over, while BIOS makes up it's 'mind' whether it should start the processor, so it can run the O/S.

  • Anonymous
    1 decade ago

    It could be the power supply, the hard drive or something in the motherboard. Go to the Geek Squad at Best Buy, they'll give you a price to fix it. It it's too much to fix, then get yourself a MacBook.

  • Tony M
    Lv 4
    1 decade ago

    From the information provided my first guess is that there's a problem with the fans (Processor, Video card, or even the Power Supply).

  • 1 decade ago

    Your very vauge, I need more detail to be able to diagnose such a problem. BUT it could be motherboard issue or hard drive issue.

    Without further information I can't say anymore

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