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Cmos checksum error-defaults loaded..........how do i fix this ????

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This is likely because the CMOS battery on your motherboard has gone bad. It needs to be replaced. Usually it is a CR2032, available most anywhere. After installed, you'll get the message again, just go into BIOS and set your date and time and then you won't see it anymore.

Thanks and please take a moment to rate as fixya. Thank you.

Posted on Jul 09, 2008

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1 Answer

Cmos checksum error


select default values in bios and save and exit if problem still persists maybe mother board cmos battery needs replacing

Oct 18, 2013 | Alienware PC Systems PC Desktops

1 Answer

Bad check sum cmos


This error is not the same as a CMOS Checksum Error, which refers to corrupted values of the CMOS settings, the ones you set through the BIOS setup program. This error means the contents of the BIOS code itself are damaged.

The BIOS ROM chip on the motherboard is probably faulty. It could also be another component on the motherboard.

You should make sure that all of the BIOS settings in the system are correct, by rebooting the system, going into BIOS setup and double-checking all the values (hopefully against a recent


If you have reset the CMOS memory you need to go into the BIOS setup screen and reconfigure the BIOS. To do that you need to press a key while the computer is booting. Usually F2 but can be other keys. It should tell you on the bottom of the first screen which key to press to enter BIOS setup.
If you don't know the settings the should be one for optimal defaults - use that one. You will also need to reset the time and date.
Save, Exit and re-boot and everything should then work.

This error is not the same as a CMOS Checksum Error, which refers to corrupted values of the CMOS settings, the ones you set through the BIOS setup program. This error means the contents of the BIOS code itself are damaged.


During the boot process you will see on the screen a certain key to press to enter setup
Press and hold that key during the boot up process to enter BIOS you can load failsafe defaults or load optimized defaults ,press escape then press f10 to save to cmos to restart
You will also need to set the time and date

In the main or system setup screen you should be able to see the date and time Using your arrow keys navigate to the date and change the date. Once highlighted on the month, day, or year, press your arrow keys or your page up / page down keys to change the date.
hope this helps you

Nov 18, 2011 | Toshiba Equium 2000 (PV1065E0-011FR) PC...

1 Answer

Gateway gt5220 has cmos checksum error - defaults loaded


Open the cpu cabinet cover then pull cmos cell from motherboard for 10 minutes then all settings defaults.Then when you power up the computer press F1 or F2 or del or ALT+F2 key to enter in bios then set bios settings.Let me know if you need further assistance.Thanks for using FixYa

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1 Answer

Getting a CMOS checksum bad error when starting my Acer M5640 Desktop with Windows 7 Thanks Daniel


Solutions to CMOS Checksum Bad Error

The CMOS Checksum Bad Error can be fixed easily by following the listed steps carefully.

CMOS Battery may not be functioning properly

If you suspect that your CMOS battery is not functioning properly, you can easily change it. Before changing your battery, reboot your computer to make sure that the error still exists. If it does, go into your CMOS and write down all of the settings. If all the settings are lost, you can usually retrieve them from your computer manufacturer. Now locate the battery and remove it, you might need to consult your computer's manual or technical support to remove your battery (the battery a flat, shiny silver colored and coin-shaped). Take down the CMOS battery's information such as volt, size, etc. Once you have your new battery, you can replace it and reenter your CMOS settings. If your battery was the cause of the CMOS Checksum Bad Error, you should have solved the problem.

Your BIOS may have been updated

If your BIOS have been updated recently, your CMOS settings may have reset. Make sure that the values entered in the BIOS are correct or simply reset them to the default settings. If you believe that a virus has updated your BIOS settings, run a virus scan and make sure that the BIOS settings are back to the default.

The Computer may not have been shut down properly

Sometimes when running MS Windows, if you shut down your computer without first properly shutting down your operating system, it will corrupt the CMOS settings causing the CMOS Checksum Bad Error. You can easily avoid this error by making sure that you completely shut down your computer properly before turning off the main power. Usually this entails going into the Start Menu, clicking on Turn Off Computer/ Shut Down. If improper shutdown was the cause of the error, you may have solved the issue.



akuma_ryu21 rate it pls!!

Jan 21, 2011 | PC Desktops

1 Answer

Cmos checksum error 0251


just replace the "CR2032 battery" in the motherboard... the enter the BIOS, then "LOAD SETUP DEFUALT"

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achanged the motherboard battery yet, this is the main couse of such a problem.

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Asus motherboard bios version1104


Whether it shows your cmos checksum error press F1 to continue or f2 to load default.? If this is the problem than kindly switch off the system check for the cmos battery and change the cmos battery and set the date and time properly in the bios and save it by pressing F10.This will resolve your problem.and if not than check the jumper setting on the motherboard is it set to clear cmos and if so kindly remove and set it properly to adjacent jumper ok. Have a nice time.

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reset to factory settings by removing the battery and then re-insert after a few minutes.

Aug 14, 2008 | PC Desktops

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Cmos checksum error-defaults loaded........how do i fix this ??????............Janet


This is likely because the CMOS battery on your motherboard has gone bad. It needs to be replaced. Usually it is a CR2032, available most anywhere. After installed, you'll get the message again, just go into BIOS and set your date and time and then you won't see it anymore.

Thanks and please take a moment to rate as fixya. Thank you.

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1 Answer

Bios


Replace the CMOS battery that is busted. after replacing configure in bios setup and load bios setup default.

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