[RESOLVED] CPU running at 100% from cold boot
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Thread: [RESOLVED] CPU running at 100% from cold boot

  1. July 10th, 2009, 11:14 AM #1
    tpuk57
    tpuk57 is offline Virtual Med Student
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    Resolved [RESOLVED] CPU running at 100% from cold boot

    OS XP Home
    512mb RAM
    ASRock 775i65GV Mobo (onbard graphics only)

    The PC from first/cold boot shows CPU usage at 100% using Task Manager. Sysinternals Process Explorer shows that this is being caused by Hardware Interupts. If the PC is then restarted it mostly runs normaly.

    Have tried swapping out RAM, disconnecting floppy and CD/DVD drives as well as removing all internal cards etc. Have only keyboard mouse and monitor connected. PSU seems to be putting out correct voltages. Have also tried replacing the HDD and ribbon cable.

    Has anyone any ideas as about the only thing left to try is replacing the Mobo

    Hope I have given adequate details.

    Any and all suggestions gratefully received.

    TP
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  2. July 10th, 2009, 11:18 AM #2
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    SuperSparks
    SuperSparks is offline Friend of Site Staff
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    Before you replace all the hardware, have you tried reinstalling Windows?
    Nick.
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  3. July 10th, 2009, 11:23 AM #3
    tpuk57
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    Installed a fresh copy of XP on a different HDD but problem still persists.
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  4. July 10th, 2009, 11:42 AM #4
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    lgbpop
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    Sounds as if the hardware configuration is being forgotten/lost when the computer's off for a decent amount of time. Wouldn't hurt to change the CMOS battery.
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  6. July 11th, 2009, 11:59 AM #5
    tpuk57
    tpuk57 is offline Virtual Med Student
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    lgbpop you are a star

    Replaced the CMOS battery and no more Hardware interupts.

    Hadn't had the usual message that comes up with a failing battery so hadn't even crossed my mind that was the problem.

    I also tested the voltage of the battery which was just under 3volts but every so often the needle would drop to just under 2 for a few seconds so I guess it was on its way out.

    Thanks for the help, much appreciated

    TP
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  7. July 11th, 2009, 10:07 PM #6
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    lgbpop
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    Glad to hear things are sorted out OK. Cheers!
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