Cmos checksum error
You can change BIOS battery this may be due to the fact that the battery powering the CMOS (when the computer is shut down it allows the CMOS to store information), is depleted.The CMOS battery is a small pin found on the motherboard; you can refer to the manual provided with your motherboard to change it.
SOURCE: CMOS Checksum Bad
bios update might fix the problem http://support.asus.com/download/download.aspx?SLanguage=en-us
if da above link doesnt work check dis alternate link but i am sure it'll work
http://drivers.softpedia.com/get/Other-DRIVERS-TOOLS/Asus/Asus-P4P800-SE-Afudos-BIOS-update-tool-226.shtml
SOURCE: Intel 102ggc:The Firmware has detected that Cmos Checksum Error
if you have vista you could do a memory check in the boot options by resarting computer and key f10 boot options, then find memory check witch will display any errors with soloutions.
SOURCE: cmos checksum error defaults loaded
Make sure the battery your using is brand new. If it is then go ahead and get into the Bios and make sure the date and time is set properly. Once you do that then go ahead and save the changes and exit.
After this go ahead and see if the CMOS exit checksum defaults comes up if not then go ahead and turn off the computer and unplug it. Then after about 5 minutues plug the computer back up and turn it on and if the message doesn't come up then its resolved.
If the cmos checksum error comes back up then try a brand new battery, should be a 2032 battery and then go thru the same steps in setting the date and time and save changes and exit and if the message doesn't come back then unplug the system again and leave it unplugged for 5 minutes. Now plug it back up and if the message stays away the problem is resolved. it the message comes back then that means the motherboard isn't reconizing the batteries and the motherboard would need to be replaced.
SOURCE: How to solve CMOS checksum and timer errors?
Hello,
Your backup battery is to weak to save the cmos data. Open your computer case and look for a round silver battery that looks like a quarter. Remove it and go to Radio Shack or a drug store battery section and get a replacement. The battery number is probably CR2032 but may be CR2025 or CR2016. insert the new battery and power up your computer, this time when you set the time and date the settings will stay when you turn it off.
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