lee said:
on start up i get a message saying cmos checksum bad.
what is this and what can be done to solve it.
Thanks
lee
Hi Lee,
You may need a new CMOS battery to replace the old one if your machine older
than 2 yrs, it may damaged or outdated.
<MS::>
CMOS Problems
The CMOS typically stores configuration information about the basic elements
of the computer, including RAM, video, and storage devices. If the CMOS is
damaged or incapable of retaining its configuration data, the computer might
be unable to start.
Each manufacturer and BIOS vendor can decide what a user can configure on
the CMOS, and what the standard configuration is. You can access the CMOS by
using either a keyboard sequence at startup or a software tool, depending on
the manufacturers specifications. It is recommended that you record or print
all CMOS information.
The computer uses the CMOS checksum to determine if any CMOS values have
been changed other than by using the CMOS Setup program. If the checksum is
not correct, the computer cannot start.
After the CMOS is correctly configured, any CMOS problem is usually caused
by one of the following problems:
• A weak battery, which can happen when the computer has been turned off for
a long time.
• A loose or faulty connection between the CMOS and the battery.
• A damaged CMOS caused by static electric discharge.
</MS::>
HP and Compaq Desktop PCs - Error: CMOS Checksum Bad
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01368145&lc=en&cc=us&dlc=en&product=443648
Removing and Replacing the CMOS Battery
http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&dlc=en&product=443648&docname=bph04375
HTH.
nass
