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My pc works only when I reset CMOS

Abit IN9 32X-MAX Motherboard Problem: My pc works only when I reset CMOS. After a restarting the pc does not work. How do I solve this problem?

Posted by igeorgop on

  • igeorgop Aug 28, 2007


    I updated the M622A_12.BIN by flashing.
    I also replaced a new battery CR2032.
    Unfortunately I still have problem.

    When I restart the pc it causes an alarm and the pc does not work.
    I always see on the monitor the message "CMOS checksum error-Defaults loaded".

    I don't know how to try underclocking my processor or to try increasing my latency.




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Hi, Some of your BIOS settings are not 100% acceptable/compatible with your current setup. I would suggest that you set everything to default, save and close/restart. Another thing you can check is if the Lithium battery needs replacement. Normally it should read 3.0Volts. If the above does not solve your problem, you can consider other things: 1. BIOS update by flashing; 2. Processor to motherboard compatibility - try underclocking your processor by lowering its FSB; and/or 3. Memory to motherboard compatibility - try increasing your latency Good luck and hope this be of some help/idea to you. Post back how things went or should you need further information. kind regards.

Posted on Aug 25, 2007

  • Anonymous Aug 25, 2007

    Hi again,

    Was just wondering; if the motherboard is fairly new, it should be still be covered by the warranty. maybe your best bet is to have it replaced.

  • Anonymous Aug 29, 2007


    Based on your last comment, I will assume that the mb is no longer under warranty or for some reason you prefer not to claim warranty and that rather than replace, you also prefer to repair and make do.

    Your post/description "...message "CMOS checksum error-Defaults loaded..." indicates BIOS issues which may be:
    1. firmware - but you recently flashed;
    2. CR2032 battery - but you replaced with new;
    3. hardware - component failure in the mb at the BIOS EPROM section, possibly a diode that is in series with the +3VDC supply from the battery. A way to check is to run the PC for a couple of minutes then restart (not shutdown); if the PC reboots without the message "CMOS checksum error...", then it is probably so. You will need a VOM, a low wattage soldering iron and knowledge of forward/reverse bias check of a diode in/out of circuit, desoldering, replacing diode;


    4. Processor to motherboard compatibility - Run at default (disable OC Guru - AutoDrive in the BIOS) run the system at the rated CPU specs or even lower (underclocking) by lowering FSB; or

    5. Memory to motherboard compatibility - try increasing your CAS latency. This is done in the BIOS look CAS latency which probably would be 2 or 2.5, make it a 3




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