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CMOS bad checksum problem in window startup

4 posts · originally from https://geek.digit.in/community/threads/cmos-bad-checksum-problem-in-window-startup.149004/

I
ishan_arora Original post #1
Nov 20, 2011 at 3:59 PM
when i swithon my PC. it shows black screen with following message:
CMOS checksum bad
CMOS Date/time is not set
press F1 to run setup

can anybody tell me what is the problem.

thanks in advance.
asingh
asingh #2
Nov 20, 2011 at 6:13 PM
Just press F1 and let it do the check. Else pull out the battery once with the power unplugged.
d6bmg
d6bmg #3
Nov 20, 2011 at 9:23 PM
Reset your BIOS.
If the problem continues, then you have to change the CMOS battery.
Zangetsu
Zangetsu #4
Nov 21, 2011 at 11:19 AM
ishan_arora said:
when i swithon my PC. it shows black screen with following message:
CMOS checksum bad
CMOS Date/time is not set
press F1 to run setup

can anybody tell me what is the problem.

thanks in advance.
Click to expand...

CMOS stores the date/time settings...
so whenever it gets corrupted the settings are lost.

so do the steps mentioned above..
if nothing works buy a new CMOS battery from h/w shop :grin: