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Does low CMOS battery affect the OS or stability?


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#1 pronfs

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Posted 21 October 2008 - 09:10 PM

Hi all,

I have an old Toshiba Satellite laptop (that belongs to a friend who have abandoned this machine for me to fix) that

I'm going to replace the CMOS battery for. Right when I turn the machine on it tells me to press F1 to enter BIOS

because of CMO read error or CMOS checksum error. I am convinced that once I change the battery this

particular problem will be gone. After all it has been used for many years.

Furthermore I have some suspicions though about the nature of this problem. The reason my friend ditched this

machine is because it would not boot up completely -

At some point while the winxp logo is shown during the startup process, a blue screen appears for about a TENTH of a

second, and the computer just simply resets/restarts itself.

My question is, could this problem have anything to do with the fact that the CMOS battery is low?

Any advice or insight is appreciated.

p.s. - the laptop itself is spyware/virus free.

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#2 Guest_Abacus 7_*

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Posted 22 October 2008 - 02:51 AM

A Low Battery can certainly affect Start up.

Personal computers also contain a small amount of battery-powered CMOS memory to hold the date, time, and system setup parameters.


They are quite inexpensive, so a new one is no big deal. After installing you may have to adjust the Time and Date.

Post back and let us know if you have further Problems.

:thumbsup:

#3 usasma

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Posted 23 October 2008 - 10:41 AM

A common problem that occurs with systems that have failing CMOS batteries is impatience.
Rather than set the date and time correctly, a use may just accept the defaults and go on using Windows.
Then, when programs are installed, they see the old date and assume it's correct.
And a lot of programs have a timeout feature - so resetting the date to the correct value will actually break some programs.

But this is most likely NOT the reason for the blue screen event. I would suggest that you try a bootable hard drive diagnostic to test the hard drive outside of Windows. There's links to the more common one's here: http://www.bleepingcomputer.com/forums/t/28744/hard-drive-installation-and-diagnostic-tools/
If you can't find the one for your hard drive (this happens quite often with Toshiba's) use the Hitachi Drive Fitness Test.

If the hard drive tests good, then I'd suggest using the Toshiba restore disks to restore the computer and start over fresh. While you'll have to do some updating, it's preferable to trying to figure out each little "nit" in the system. Depending on the Service Pack level, I'd suggest updating your device drivers from the Toshiba website BEFORE updating Windows.
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