CMOS Checksum Bad

Ecs (elitegroup computers) P4m800pro-m m...
December 27, 2009 at 23:32:36
Specs: Windows XP
i had this problem cmos checksum bad.cmos date/time not set and below is press F1 to run setup. but even if i press F1, i can't enter the setup,i've changed the keyboard 3x thinking it myt be the keyboard not functioning but still i can't enter setup so that i could troubleshoot. i can't even enter the windows, it just ends on the screen with the label cmos checksum bad. also, i've changed the cmos battery and still the problem persists. i also cleared the cmos memory by moving the cmos jumper but there was no change. hope someone could help.

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#1
December 28, 2009 at 01:31:20
you downlode your mother board bios and update from your mother board manufacture web site.

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#2
December 28, 2009 at 01:34:46
how could i download the bios on the pc if i can't boot the computer.

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#3
December 28, 2009 at 01:44:22
I think u have bad cmos battery, try to replace it

edit.. 3 possible reasons bad cmos battery, bios has been updated, dirty shoutdown. Try to replace battery first.


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Related Solutions

#4
December 28, 2009 at 06:07:57
Many BIOSes do not configure USB devices when they revert to the default settings. Sounds like that is what has happened in your case.

Your CMOS battery may be dead as mentioned above.

The solution, even after changing the battery, is to use a PS/2 keyboard, at least temporarily.


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#5
December 28, 2009 at 06:43:17
i also tried to change the battery and still no change...

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#6
December 28, 2009 at 07:13:04
What type of keyboard are you using? USB or PS/2?

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#7
December 29, 2009 at 02:02:54
i am using a ps/2 keyboard

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#8
December 29, 2009 at 06:55:48
Did you have the computer unplugged when you cleared the CMOS?

Start tapping the correct key to enter the BIOS as soon as you boot the computer.


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