Question about ASUS P4P800-MX Motherboard

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Will not power-up after a shut down unless the CMOS is cleared.

I'm forced to clear the CMOS after a shutdown to get the PC to power up. I'm clearing the CMOS by turning off the PS, removing the battery and moving the jumper to pins 2-3. After waiting about 10 seconds, the battery is re-installed and the jumper is set back to pins 1-2 and the PS is turned back on. On boot up, F2 is required to reset the BIOS; the PC will then boot correctly.

If I leave the battery out and perform a shutdown, the PC will power up without clearing the CMOS as state above, but I still have to press F2 to continue booting.

I have replaced the battery with a new one, but problem continues to occur. If I restart instead of shutdown from within Windows, there's no problem.

Any idea what's causing this to happen?

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  • 3 more comments 
  • Gary O Jul 14, 2008

    Custom built. What info do you need?



  • Gary O Jul 14, 2008

    The problem has been resolved.



    I discovered that the CMOS jumper was missing the internal metal
    connector. It must of fell out of the plastic housing somehow.
    Replacing the jumper resolved the problem.



    What are the odds of something like this happening?



  • Michael Ortega
    Michael Ortega May 11, 2010

    I think we could've been here for awhile trying to find that one. Good job for finding it.



    MO

  • Michael Ortega
    Michael Ortega May 11, 2010

    What's the model of the motherboard itself?



    Was the computer ever functioning properly without the startup annoyance?

  • Michael Ortega
    Michael Ortega May 11, 2010

    What's the computer model?

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  • 284 Answers

Try swapping the Ram Chips "Memory" try running it with less memory or if you have multi chips take a few out and run it

Good luck

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Posted on Jul 14, 2008

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