Saturday, January 15, 2011

Bad CMOS battery - cannot detect device drives

Bad or weak CMOS battery can cause the CMOS mismatch errors. This will result in the following.



1. Finds a device that is not recorded in the CMOS.
2. Does not find a device that is recorded in the CMOS.
  • CD ROM/DVD ROM drive
  • Floppy Drive
  • USB
  • Hard disk
  • Keyboards
  • Mouse
  • Windows Timer Reset automatically each reboot
3. Finds a device that has different settings than those recorded for it in CMOS.
4. Detects a CMOS checksum error.
5. When turn on the computer the dates is always reset. Even if  you set to correct it will reset automatically whenever reboot the system

Solution: Replace the CMOS battery with new one on the motherboard.

CMOS Battery Standard Specification: Lithium Battery CR2032
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Bad CMOS battery | Faulty CMOS battery | Weak CMOS Battery