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Thread: Motherboard Power Connector Testing Question

  1. #11
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    Try isolating the PSU pin for a test. If power is applied and the system stays off, at least you know to look at the motherboard.

    With the PSU disconnected, what resistance reading to get between PS_ON on the motherboard and ground?

  2. #12

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    Quote Originally Posted by Smack2k View Post
    ....no idea why once the power supply is applied the keyboard starts blinking and the fans all come on.....
    On some systems when power is first applied, ie: from the wall socket, It will run through a short self test of some internals, Hence the fans starting, Led's blinking, And then go into standby mode, Some will display a fault code by LED on the front panel, What system / motherboard is this ?.

  3. #13
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    Its an ASUS P5A Super Socket 7 board....
    "In Life, The Days Are Long But The Years Are Short..."

  4. #14

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    I don't recall having one of those boards, It might be normal when power is first applied for a self test to run then drop into standby, One thought comes too mind have you removed the battery and with a cleared cmos tried to power on normally.

  5. #15
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    Yeah, with a battery, without a battery, shorting the CMOS jumper, does the same thing everytime.....as soon as power supply is turned on, keyboard lights blink on and off and fans come on.....tried multiple PSUs to.
    "In Life, The Days Are Long But The Years Are Short..."

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