Acer AB460 F1 User Manual - Page 603

583 BIOS Message Description 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 Memory size found by POST differed from POST differed from CMOS 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.