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    Rman33's Avatar
    Rman33 Posts: 7, Reputation: 1
    New Member

    Jul 2, 2014, 04:38 PM
    Gigabyte motherboard questions
    In my latest computer build I have a Gigabyte B85M-D3V with an Intel
    i3 G3220 CPU. It worked for a while but not when I turn it on both the
    CPU fan and power supply fan will run for about 2 seconds and then stop.
    I am testing this outside the case now with only CPU and memory installed.
    I have tried a different power supply so I know it has to be either the CPU or
    Motherboard that is bad.
    When I take out the CPU and turn it on the power supply fan will run for about 2
    Seconds and stop. Is this normal for a Gigabyte board or does it mean the
    Board is shorted?
    cdad's Avatar
    cdad Posts: 12,701, Reputation: 1438
    Internet Research Expert

    Jul 5, 2014, 09:50 AM
    For many boards it is normal to turn on full blast for a second or two then shut down until it recieves instructions to do more. Most fans are triggered by heat. If there is no heat then the fan can be slowed down or shut down. This is how they conserve energy and get the "green" sticker. Have you put everything together and run any tests within a OS? That is what is going to tell you what is going on and if your having overheating issues.
    InfoJunkie4Life's Avatar
    InfoJunkie4Life Posts: 1,410, Reputation: 81
    Ultra Member

    Jul 5, 2014, 07:51 PM
    Most likely it is a motherboard issue. RAM Issues will cause corruption of running applications/OS's or the machine to run and do nothing. CPU Can be similar, however usually causes exactly as you describe. CPU's however rarely fail except in excessive overheating or manufactures defects. You should also inspect it for physical damages. Most common, a computer will behave as you describe when a CPU is not compatible, which you can check here, or the board is damaged. The two most common damages to these types of boards are capacitor failure (Swollen or bulging capacitors) or GPU fractured solder points. There are some other less common causes, but I would start investigating with compatibility, RAM failure, and board issues.
    Rman33's Avatar
    Rman33 Posts: 7, Reputation: 1
    New Member

    Jul 6, 2014, 02:14 PM
    Thanks for replies.
    This board worked long enough for me to install windows 8.1 on my SSD so I know the CPU and ram are compatible.
    It has changed a little from my first post. Now when I turn it on the fans on both the CPU and PSU do not move UNLESS I have the 8 pin 12 volt ATX connector removed and then I have the 2 second shutdown cycle as before.
    I could send the CPU back for warranty replacement if I knew for certain it was bad but what I am wondering is if the motherboard is bad could it ruin the CPU?
    cdad's Avatar
    cdad Posts: 12,701, Reputation: 1438
    Internet Research Expert

    Jul 6, 2014, 03:12 PM
    Are your voltages correct and do you know what tempratures your running at ?
    Are you running the system OC? (OverClocked)
    Rman33's Avatar
    Rman33 Posts: 7, Reputation: 1
    New Member

    Jul 6, 2014, 03:52 PM
    If you mean voltages coming from the power supply, I assume they are correct since I have tried 2 different power supplies with the same result
    As for temperature, it could not be measured because the psu does not run long enough to turn anything on. I have never overclocked.
    cdad's Avatar
    cdad Posts: 12,701, Reputation: 1438
    Internet Research Expert

    Jul 6, 2014, 05:53 PM
    No not voltages from the powersupply. The ones for your cpu and memory. You need to make sure your bio's are configured correctly.
    Rman33's Avatar
    Rman33 Posts: 7, Reputation: 1
    New Member

    Jul 6, 2014, 09:24 PM
    I would not be able to test voltages on the board and I could not fix anything on the board anyway.
    I am mainly interested in trying to determine whether the board is bad or the cpu is bad. Maybe I could get a new board but if the CPU is bad would it ruin the new board?
    Appzalien's Avatar
    Appzalien Posts: 540, Reputation: 57
    Senior Member

    Jul 9, 2014, 08:00 AM
    Since this is your build I would pull the motherboard, set it on some cardboard or something, and try it out of the case (be careful if you have a video card). Many motherboards are designed with the same basic PC board used for multiple versions and functions (one has on board video another has not). Since the same board is used for multiple designs sometimes a mounting hole is necessary (ground) on one but not the other. A quick way to check is if the hole has solder around it its meant as a ground, if not you should not put a stand off there it can cause a short. This has happened to me before. Another place to look for shorts is the back plate. When you slide the mobo into place the back plate has a few spring like things to help you position the board correctly. If one of those springs gets inside of a usb port or any other port it can also short. You can usually check that with a flashlight and peek in each port. This also happened to me on one of my first builds. Since then I often pay close attention to them and sometimes lift them up to get them on top of the port metal box where they belong. Since the motherboard and power supply feed the cpu, and the cpu feeds nothing, it cannot harm the later.

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