1 Reply Latest reply on Oct 22, 2011 2:52 PM by Flying_Kiwi

    CMOS checksum error, BIOS Setup hangs, Unable to boot from disks




      I have the following problem with my desktop with 2-3 years old:


      After POST test, below is shown:


      CMOS checksum error - default loaded.


      F1-continue, del-bios


      If I enter into BIOS setup, it hangs most the times after a few seconds. Plus, the text becomes blurred.


      It cannot boot from USB flash drives, or dvd-rom, or hd.


      My PC configuration:

      intel quad core
      hard drive
      dvd rom

        • 1. Re: CMOS checksum error, BIOS Setup hangs, Unable to boot from disks

          The CMOS checksum error is commonly associated with failure of the coin cell battery on the motherboard. Given the systems age, this is also a possible reason for your problem (although usually batteries last a bit longer than 3 years - perhaps 5). You're best bet is downloading your motherboard manual from the board makers website (or possibly even on the CDROM that came with the motherboard) and following the instructions in there, change the battery for one of the correct type. When you reboot, you'll have to go into the BIOS setup again and load default values and save out of there. As it's not an Intel branded board, if you're still having issues with it after checking this, you're better off posting in the board manufacturers forums or emailing their tech support people. Good luck with the new battery!