4: Maintenance, Service and Troubleshooting
68
CMOS Battery State Low
The battery in your system, which provides power to CMOS to
store the system settings, is low in power and needs to be changed
or recharged (depending on the battery type). Leave the computer
switched on for 48 hours to recharge the battery.
CMOS Checksum Failure
When you save changes made in Setup and exit the Setup
program, a checksum value is generated. This value is stored and
used for error checking. If this stored value is different from the
value determined by the POST routines during start-up, the CMOS
Checksum Failure error message is displayed. Change the Setup
to the optimal settings then change any additional variances
according to the model of computer (see page 79 for details on the
Setup program). If this error message is displayed frequently, you
may have a hardware problem and should contact RM.
Note:
Some viruses can change the BIOS configuration and cause a checksum failure.
Check by running a virus checking program.
CMOS System Options Not Set
The system settings stored in Setup are either corrupt or non-
existent. Run the Setup program and make any necessary
changes. If the password options have been corrupted, the
password reverts to the default password. See page 80 for details
of the default password.
Keyboard Error
There is an error with the keyboard connector or a key is being
held down. Check that the keyboard connector is plugged into the
rear of the computer correctly.
CMOS Memory Size Mismatch
The BIOS has detected a difference between the amount of RAM
in the system and the amount stored in the Setup program. Press
<F1> to run Setup. The correct memory size is recorded
automatically.
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