Cmos Battery Problem - Alienware Area-51m 766 User Manual

CMOS Battery Problem

A message "CMOS Checksum Failure" displays during the
booting process or the time (clock) resets when booting -
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Try to reboot the system.
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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 next to the DDR DRAM socket. See
Chapter 4 on how to access the DDR DRAM socket. If you are
not sure how this is done, return the notebook to the dealer.
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■ chapter 5 trouble shooting