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1248
April 20th, 2021 09:00
m15 R1, System CMOS checksum bad
System CMOS error keeps coming up every time I on my laptop also laptop only works when the charger is connected. When I took it to the service centre I was told that the CMOS battery is fine and main battery needs to be changed but when I did diagnosis battery health was shown as excellent.
So I just wanted to know if CMOS error has anything to do with the main battery and if I should get it changed?
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sahithi_anugu
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April 20th, 2021 11:00
Service tag -
ejn63
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April 20th, 2021 13:00
Don't count on the "battery health" meter -- it's not a reliable measure. You can run a battery report:
Open a command prompt with admin privileges, and type powercfg /batteryreport. It will tell you how much of the battery's initial capacity remains. If it's under 50% of the design capacity, it will drain very rapidly. That can indeed lead to draining the CMOS battery (and the error you're seeing).
mmafa
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11 Posts
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April 10th, 2022 23:00
I am also having a similar issue.. Did you find any solution other than chaning the main battery? Thanks