C-8 System Board, Connectors, and Error MessagesMessage Keyboard locked—Unlock key switch.Cause Unlock the system to proceed.Message System battery is dead. Replace and runSETUP.Cause The CMOS clock battery that supports theBIOS is dead.Solution Replace the battery and run the Setup Utilityprogram to reconfigure the system.Message System CMOS Checksum bad – run SETUP.Cause System CMOS has been corrupted or modifiedincorrectly, perhaps by an application programthat changes data stored in CMOS.Solution Run the Setup Utility program and reconfigurethe system, either by selecting the defaultvalues and/or by making your own selections.Message Monitor type does not match CMOS – RunSETUP.Cause The monitor type is not correctly identified inthe Setup program.Solution Run the Setup Program.Message Operating System not found.Cause The operating system cannot be found in eitherDrive A or Drive C.Solution Run the Setup program and make sure thefixed disk and drive A are properly identified.