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Alienware Area-51 m5550 Technical Reference
74
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 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.
Memory Problems
The POST does not show an increased memory capacity when you have
already installed additional memory -
• Certain brands of memory module may not be compatible with your system.
You should ask your vendor for a list of compatible DIMM.
• The memory module may not be installed properly. Go back to Chapter 4 to
review the details of this operation.
• The memory module may be defective.
The O/S issues an insufficient memory error message during operation
• This is often a software or Windows-related problem. A program is draining
the memory resources.
• Close the application programs you’re not using and restart the system.
• You need to install an additional memory module. For instructions, go to
Chapter 4 Upgrading Your Computer.
m5550-04-2007-techref.indd 74 4/6/2007 12:29:53 PM