ASUS motherboard P5S-MX SE LGA775 SiS671FX Dual core / Core2 Duo PCI-E integrated VGA micro ATX P5... (4719543152454) Logo
Posted on Apr 17, 2009
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Computer is not functioning

When i press the power button the cpu fan turns a split second only, then it stop. i am wondering if it is my power supply or mother board is faulty, but the lead in the motherboard is lighting, so its a sign that my power supply is giving power to the mother board, that's what i think. can some one please help me.


  • ultimitloozr May 11, 2010

    The LED is probably indicating that you are getting +5V to the motherboard. The PSU may be having issues with the +12V rail. Have you added any hardware to the system lately? If so, have you exceeded the +12V rating of the PSU? Many of the fast graphics cards **** a lot of juice from the +12V rail and you may need to get a bigger PSU to support the card. There is also a large drain on iit, especially during startup, when the drives attempt to spin up and if you have multiple internal hard drives attempting to start at the same time, it can cause the same type of problem.

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  • Expert 83 Answers
  • Posted on May 16, 2009
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Please check the lock of your processor. If it is tight or loose. If it is loose then it is the one causing the mother board no to function properly. You must tighten it to make it stable. After checking and it is not the reason for the malfunctioning of the system. Try to remove your CMOS battery and then clean, and remove also your memory card in the mother board and clean. Return it after cleaning and then close the CPU and turn it on. During the booting process strike the delete key to enter into bios set up. Adjust the time/ date settings to your current time. Press F10 then enter. wait for the CPU to process.

Please post any comment if it was solve so that I can give you more option if it does not solve your problem.


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