When BIOS detects a CMOS checksum error, the following message is displayed:
CMOS Checksum Error. Press F1 to enter Setup. Press F2 to load defaults and continue.
The following procedure is the recommended method to clear Checksum Error.
Press F1 to enter the BIOS Setup utility.
Use the arrow keys on the keyboard to select the Exit menu.
The submenus become available.
Use the arrow keys on the keyboard to select Load Optimal Defaults and press Enter.
At the prompt, select OK by pressing the Enter key.
Press F10 to save and Exit the BIOS Configuration.
At the prompt, select OK by pressing the Enter key.
Alternatively, you may clear the error using the following method.
Press the F2 key.
The default BIOS settings automatically load into the CMOS and the boot process continues. A manual system reset is required for some system settings to take effect. For example, the Hypertransport Frequency and Width.