This document pertains to all Desktop Computers.
One of the following error messages appears when starting the computer:
- BIOS ROM checksum error
- System CMOS checksum bad - default configuration usedPress
to resume, to Setup - CMOS Checksum BadPress F2 to Run SETUPPress F1 to load default values and continue
- CMOS Checksum Error - Default loaded
The
error that appears depends on the type of BIOS used. Any of these error
conditions indicate that a Basic Input/Output System (BIOS) test
failed.
There are two main reasons why a BIOS test fails:
- The battery on the motherboard has lost its ability to supply power. The system time and date are also affected by a bad battery.
- The BIOS was updated "incorrectly". This can happen if power is lost while updating the BIOS, or when the BIOS is updated with an update that was not downloaded from orignal website or resource, or when a certain virus or malicious program modifies the BIOS data.
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