User's Manual

■ chapter 5 trouble shooting
5-10
CMOS Battery Problem
A message “CMOS Checksum Failure” displays during the
booting process or the time (clock) resets when booting -
 Try to reboot the system.
 If the message “CMOS Checksum Failure” appears
during the booting procedure even after rebooting, it may
indicate failure of the CMOS battery. If so, you need to replace
the battery. This battery normally lasts two to five years. The
battery is of type CR2032 (3V). You may replace it by yourself.
The battery is located under the System Device Cover on the
bottom of the notebook. See Chapter 4 for more details.