#Cmos checksum invalid update

After replacing the battery, remember to set the correct BIOS settings, including the date and time. On a desktop PC this is a very simple procedure, but on a laptop it can be difficult to reach the battery (however, on laptops this problem is less common) and the battery itself is usually not simply 'plugged in', but wired as in the second image below.

Replacing the CR2032 battery on the motherboard ('BIOS battery' replacement).Sometimes the described method works once, but then the error reappears. Note that the reset can reset important boot parameters (UEFI and Legacy mode, Secure Boot and must be restored to their previous state for the system to boot properly). If it is possible to enter the BIOS / UEFI when the error occurs, reset the BIOS to the default values (Load Defaults, Restore Defaults, or Load Optimized Defaults, usually on the Exit tab).If the error occurs only once, for example after changing accessories, and the operating system starts normally afterwards, try a simple reboot of the operating system - the error may not occur again.To fix CMOS checksum error - loaded defaults and the like, the following approaches can be used:

#Cmos checksum invalid update

This can be due to a number of reasons: power problems, failure to write BIOS settings or update or, in rare cases, a hardware failure. The error in question is due to a mismatch between the stored checksum for data stored on the CMOS chip (BIOS memory for storing computer configuration parameters) and the actual checksum for that data at the time of the boot check.