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‎05-20-2024 12:20 PM - edited ‎05-20-2024 12:48 PM

HP Recommended
Product: HP Notebook - 15g-dr0006tx

 I am facing CMOS error 502 (when I turn on my laptop after sudden turn off having battery more than 50% ) . And I am unable to locate CMOS battery in my laptop . Please guide me for proper solution 

 

Please reply me , i will thankful to you

Category:
3 REPLIES 3

‎05-20-2024 01:15 PM - edited ‎05-20-2024 01:15 PM

HP Recommended

Your notebook does not have a CMOS/RTC battery.

 

The main battery also serves as the CMOS/RTC battery which maintains the BIOS and system clock settings.

 

Below is the link to the service manual:

 

HP 15 Laptop PC Maintenance and Service Guide

 

Chapter 3 has no CMOS/RTC battery part number.

 

Chapters 5 and 6 have no CMOS/RTC battery removal or replacement procedure.

 

 

1 person found this reply helpful
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‎05-20-2024 01:31 PM

HP Recommended

Thanks for reply 

 

 

Means that the issue will be resolve after main battery replacement as I'm also facing battery backup issue with CMOS reset error 502

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‎05-20-2024 02:10 PM

HP Recommended

You're very welcome.

 

Yes, replacing the main battery with a new one should resolve the dead with ~50% or more battery power remaining and the CMOS 502 checksum error.

 

The main battery probably has one or two bad cells.

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