Main BIOS checksum error !

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  1. Posts : 41
    Windows 7 Ultimate x86 SP1
       #1

    Main BIOS checksum error !


    My pc is showing " main bios checksum error " , it even does not start in one time i have to push on button 4 to 5 times the it starts . What to do ?
      My Computer


  2. Posts : 7,379
    Windows 7 ultimate x64
       #2

    Hey Shukla, Try removing the CMOS battery and keep it out for 30+ mins and then insert it back. Try this first and let us know.
      My Computer


  3. Posts : 41
    Windows 7 Ultimate x86 SP1
    Thread Starter
       #3

    I have done that but nothing happens .
      My Computer


  4. Posts : 7,379
    Windows 7 ultimate x64
       #4

    It seems like you tried to update the BIOS and it did not go well. If yes, Try this.

    Unplug the power from PSU. Take out the CMOS battery and all unnecessary peripherals (Take out anything your PC doesn't need to boot. This includes card readers etc.). Unplug all the HDDs. Run the PC on just one RAM stick (if you have multiple RAM sticks). Only keep your keyboard plugged in.

    Wait for BIOS to reset, put the battery back. Boot the machine, then go to BIOS settings, run Q-FLASH. Update the BIOS to latest version. Disable "LOAD CMOS DEFAULT".

    Plug in all the devices back and then check.
      My Computer


  5. Posts : 41
    Windows 7 Ultimate x86 SP1
    Thread Starter
       #5

    no , i never tried to update bios .
      My Computer


  6. Posts : 1,711
    Win 7 Pro 64-bit 7601
       #6

    then bios corrupted on its own. need to update the BIOS for your motherboard.
      My Computer


  7. Posts : 7,379
    Windows 7 ultimate x64
       #7

    As already mentioned above. BIOS is corrupted. If possible get updated BIOS file for your motherboard and update it with the steps mentioned.
      My Computer


  8. Posts : 41
    Windows 7 Ultimate x86 SP1
    Thread Starter
       #8

    I have updated the latest bios version ( from version F1 to version F3 ) on my motherboard with the help of @BIOS utility tool. Thanks for helping.!
      My Computer


  9. Posts : 41
    Windows 7 Ultimate x86 SP1
    Thread Starter
       #9

    it again showed that message
      My Computer


  10. Posts : 1,711
    Win 7 Pro 64-bit 7601
       #10

    Then it could be drained CMOS battery or dying PSU.

    Or at least in other such cases I had the culprit was that. I hope others have better ideas.
      My Computer


 
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