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Thread: PC turns on then off

  1. #1
    Newbie Ronb's Avatar
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    PC turns on then off

    Hello my sysem consist of a Intel D525mw motherboard, 4gigs memory, m4-atx power supply, sata HD, SATA dvd rom, and running Windows XP (for right now) So my prob is when ever I start my car the pc will turn ond then shut off after 2 or 3 sec. I then have to manually turn it on. Befor I installed it in the car it did the same thing but I thought I fixed it because it stoped doing it. Now that it is in the car its doing it again I tryed to see if theres something in the bios but I cant find anything. Can someone help me???? Thank You

  2. #2
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    What type of cooling fan?

  3. #3
    MySQL Error soundman98's Avatar
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    have you tried disconnecting the power button lead from the m4 and manually triggering the mo-bo? i have my suspicians that the m4 is sending too long of a pulse, getting the pc to turn on, go through bios, then realize the power button is being held, and shut off..

  4. #4
    Maximum Bitrate Mickz's Avatar
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    If all else fails, try this.

    GA-Z77N-WIFI, i5-2400S, 8GB, Intel 520 128GB SSD, M4-ATX Modified, 2 Rev Cams, 2 Web Cams
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  5. #5
    Newbie Ronb's Avatar
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    I will try the power botton thing. About the cooling fan the motherboard is an air cooled board but I did install a fan onto the heatsink its a fan for a southbridge chip and there are two case fans. After a 2hr drive both cores were at 40/C so I know its not a heat issue. Thanks for the help I'll keep you posted

  6. #6
    Newbie Ronb's Avatar
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    Ok I removed the power lead and was going to jump it off the MB but it the pc turned on then off again with nothing hooked to the power button jumpers I have the dip switchs all off except #1 is on the M4 I'm thinking it might be in the bios settings or something. Dose anyone have any ideas? Thanks alot for all your help.

  7. #7
    MySQL Error soundman98's Avatar
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    the next step would be to remove the pc from the car and test the motherboard with a known-working ac-dc computer power supply. though it does sound like your motherboard is defective.

  8. #8
    Newbie Ronb's Avatar
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    I have removed it from the car and bench tested. It was doing the same thing with the AC power supply. I went into bios and changed settings in the when power is removed what should happend and turned it to turn on and that stoped it but now when I start the car it turns on but wont shut off when I turn the car off. im going to try the other settings. Will see

  9. #9
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    Ronb, Did you ever figure this issue out? I have the same motherboard and Power Supply and it is doing the same exact thing.

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