Troubleshooting CMOS checksum

During POST process, BIOS is capable to trace error on the system, usually when a error occurred, system will be issue a beep sound and comes with a message:

PRESS F1 TO CONTINUE or CTRL + ALT + ESC or DEL TO ENTER SETUP

This article will only explain the error code for the system that using a BIOS type Award only. Please make sure first that the type of BIOS that you are use because each BIOS have different error code.

Error Code for BIOS Award
During this article was wrote, there is only one type of beep sound code and more than 40 types of error for the Award BIOS. One sounds a long beep followed by the two short beeps indicates that there is error in the video that the BIOS is not able to receive video signaling.

The Error message is a message that display on computer screen that is indicates error on the main system board. Among error message that is frequently encountered by users is the type of results to Add-Check (CMOS checksum error). CMOS checksum error problem is usually caused by the failure of the CMOS to get the decision right for the add-check in the BIOS.

Here are 4 types of CMOS checksum error code for the Award BIOS and descriptions:
Error Message BIOS Award

Description

BIOS ROM checksum error - System halted

The add-check results on BIOS in the BIOS chip is not accurate, this indicates that your BIOS code has corrupt. To solve this problem, replace the BIOS with the other BIOS.

CMOS battery failed

CMOS battery does not work. Replace with new battery.

CMOS checksum error - Defaults loaded

Add-check Results CMOS does not exactly because the system had to fit the configuration of origin. Results may indicate add-check CMOS have been corrupt. This error may be caused by a weak battery. Check the battery and replace it with another if necessary.

CMOS CHECKSUM ERROR DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER

Add-check Results CMOS does not accurate and a sign indicates CMOS have been corrupt. This error may be caused by a weak battery. Check and replace battery with other battery if necessary.



When examined the information on the schedule error message, the problem is checksum error is usually caused by weakness in the CMOS battery. To overcome this, you can replace battery with the new battery. Battery can be found at any computer accessories shop at the equitable price.