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rdupless
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Solved!

CMOS Battery location

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HP 15-da00076nr
Microsoft Windows 10 (64-bit)

I am having issues locating the CMOS battery.  The original owner carried the laptop in for a repair, but the repair was too expensive.  My assumption is this repair shop removed the CMOS battery and I can't locate where it was located. Does anyone have any idea?

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Paul_Tikkanen
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Hi:

 

Most of the newer HP notebooks such as yours do not have a CMOS battery.

 

The internal battery maintains the clock and BIOS settings.

 

Below is the link to the service manual for the 15-da0xxx model series, and as you can see...no RTC (CMOS) battery is listed in chapter 3 nor is there a procedure to remove and replace the RTC battery.

 

HP 15 Laptop PC Maintenance and Service Guide

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Paul_Tikkanen
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145,033 68,594 22,827 35,003
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Hi:

 

Most of the newer HP notebooks such as yours do not have a CMOS battery.

 

The internal battery maintains the clock and BIOS settings.

 

Below is the link to the service manual for the 15-da0xxx model series, and as you can see...no RTC (CMOS) battery is listed in chapter 3 nor is there a procedure to remove and replace the RTC battery.

 

HP 15 Laptop PC Maintenance and Service Guide

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WAWood
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@rdupless 

I'm going to be presumptive in that MOST folks coming here asking about CMOS batteries in laptops are trying to remove that to reset a password -- which, of course, does NOT work.  IF that is your issue, then you are likely stuck because any BIOS or power-on password is encrypted into the firmware on the motherboard.



I am a volunteer and I do not work for, nor represent, HP
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rdupless
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I am absolutely in disbelief. I considered the CMOS battery as an unreasonable concept years ago and considered the local battery as a replacement. But didn't have a solution if the local battery completely discharged and having to configure CMOS settings periodically. Absolutely no one at HP could provide a solution to my problem, and the manual didn't provide any information. They attempted to sell me a CMOS battery for a system that didn't have one. I viewed several motherboards, and couldn't locate the CMOS battery connector or RTC connection. My final solution was searching the motherboard for a new surface-mount battery. I truly appreciate the information you provided. It is like an introduction to viewing the Holy grail. Wow!

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Paul_Tikkanen
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You're very welcome. 

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