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Thread: Motherboard problem?

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    XFIRE ID: pacotito Steam ID: pacotito

    Motherboard problem?

    I have an older amd build. The system won't start with the power button. The only thing that happens is the power light comes on. However if I short the green to black on the 24 pin connector the fans turn on and the computer will then start with the power button and run without any issues.

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    Re: Motherboard problem?

    Personally I would start with a CMOS clear.

    Before you go through all that though grab HWInfo and check you main voltages. A good rule of thumb is they need to be no less the 10% off the stated Voltage. So 3.3V should be no less then 3V. The only rail I would not apply this rule to personally is the 12V rail. If the 12V rail is under 11.95 I would try to test with another PSU.

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    Re: Motherboard problem?

    Quote Originally Posted by Dren View Post
    Personally I would start with a CMOS clear.

    Before you go through all that though grab HWInfo and check you main voltages. A good rule of thumb is they need to be no less the 10% off the stated Voltage. So 3.3V should be no less then 3V. The only rail I would not apply this rule to personally is the 12V rail. If the 12V rail is under 11.95 I would try to test with another PSU.
    Well, he can't boot so he would need a hardware power tester. That's also my recommendation to see if it's the PSU or MOBO. You could always buy one at best buy or something and return it if it didn't resolve the problem.

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    Re: Motherboard problem?

    He said he can jump the main power an get it running without issue.

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    Re: Motherboard problem?

    Quote Originally Posted by Dren View Post
    He said he can jump the main power an get it running without issue.
    whoops, my bad!!!

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    Re: Motherboard problem?

    Voltages are good from what i can see in hwinfo. Im not an expert on the inner workings of a motherboard but it seems maybe a capacitor is discharging for some reason. Once i get it started it will shut down and restart 3 or 4 times and the psu has to run a couple mins before i can get it to start.

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    Re: Motherboard problem?

    Quote Originally Posted by pacotito View Post
    Voltages are good from what i can see in hwinfo. Im not an expert on the inner workings of a motherboard but it seems maybe a capacitor is discharging for some reason. Once i get it started it will shut down and restart 3 or 4 times and the psu has to run a couple mins before i can get it to start.
    you can look at the capacitors and physically see if they have been popped, they will look like a bloated battery end. They should be flat and not bloated out.

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    Re: Motherboard problem?

    1st When a computer starts, and then restarts several times, It is most likely the capacitors are failing, on the motherboard. They may be bulging and may not, (usually are). If you can jump the power supply pins, and it starts, then you may have a problem with your power contact switch also.

    2nd You stated that the system is several years old. So the 1st could be the problem (probably is) and/or, the following. The system would not boot if 12v rail is less the 11.6v output. Your power supply, due to its age. could be failing under load. Its capacitors could be failing also.

    My experience is: Network Technician/Computer Hardware Instructor, since 2002

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