A-2
Appendix A: BIOS POST Messages
System CMOS checksum bad - Default configuration used
System CMOS has been corrupted or modified incorrectly, perhaps by an
application program that changes data stored in CMOS. The BIOS installed Default
Setup Values. If you do not want these values, enter Setup and enter your own
values. If the error persists, check the system battery or contact your dealer.
System timer error
The timer test failed. Requires repair of system board.
Real time clock error
Real-Time Clock fails BIOS hardware test. May require board repair.
Check date and time settings
BIOS found date or time out of range and reset the Real-Time Clock. May require
setting legal date (1991-2099).
Previous boot incomplete - Default configuration used
Previous POST did not complete successfully. POST loads default values and
offers to run Setup. If the failure was caused by incorrect values and they are
not corrected, the next boot will likely fail. On systems with control of
wait
states
, improper Setup settings can also terminate POST and cause this error on
the next boot. Run Setup and verify that the waitstate configuration is correct.
This error is cleared the next time the system is booted.
Memory Size found by POST differed from CMOS
Memory size found by POST differed from CMOS.
Diskette drive A error
Diskette drive B error
Drive A: or B: is present but fails the BIOS POST diskette tests. Check to see that
the drive is defined with the proper diskette type in Setup and that the diskette
drive is attached correctly.
Incorrect Drive A type - run SETUP
Type of floppy drive A: not correctly identified in Setup.
Incorrect Drive B type - run SETUP
Type of floppy drive B: not correctly identified in Setup.
