How To Fix CMOS CHECKSUM Error

December 2017

When a CMOS Checksum error occurs during system startup, it could mean that the system has been restored to default factory settings. The CMOS contains data related to BIOS and may have been reinitialized, causing this error. The problem could also occur due to the depletion of the CMOS battery.

This tutorial will walk you through how to get rid of this error.

Get Rid of CMOS CHECKSUM Error

This issue can be fixed in one of two ways.


The first is by reinitializing the BIOS. To find out how to do so, refer to this FAQ. Otherwise, contact a professional.


The second is by changing the BIOS battery. The CMOS battery is a small pin found on the motherboard. You can either refer to the manual provided with your motherboard to change it or have a computer technician change it for you. If you'd like to try to do it yourself, refer to our FAQ on the subject.

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Published by netty5. Latest update on November 22, 2017 at 05:55 PM by owilson.
This document, titled "How To Fix CMOS CHECKSUM Error," is available under the Creative Commons license. Any copy, reuse, or modification of the content should be sufficiently credited to CCM (ccm.net).
BIOS Commands
FDD CONTROLLER FAILURE