HP CMOS battery problem.

[mickymouse1168]

I wanted to reset or change my CMOS battery. I opened up the laptop. But I couldn't find the CMOS battery unit.

Please kindly advice. Much appreciated. Thanking you all in advance.

[Lil_Boy_Blue]

Hi

https://support.hp.com/gb-en/product/hp-14-cf0000-laptop-pc/20395769/model/24143722/manuals

http://h10032.www1.hp.com/ctg/Manual/c06146792

I see no evidence it has one.

[mickymouse1168]

Thank you for your kind reply. In other words, my laptop don't have a CMOS battery compartment.

I have taken out the bloated battery and I am now using A/C power plugged in all the time.

Now the laptop will startup very slowly. And it will always show the Reset 502 symbol. Then after 

a short wait, it will start normally. 

Thank you once again. Much appreciated.

[Lil_Boy_Blue]

Hi

Background info...

https://h30434.www3.hp.com/t5/Notebooks-Archive-Read-Only/CMOS-reset-502/td-p/2438401

"This means the BIOS is assumed to be corrupt and the system will install a hidden copy of the BIOS to correct the problem and the startup process continues."

~~~~~~~~~~~

Maybe/Hopefully one of these documents will cover (and solve) your problem...
https://support.hp.com/ca-en/document/c00042629

https://support.hp.com/us-en/document/c02693833


https://support.hp.com/us-en/document/c04126730

[Lil_Boy_Blue]

https://support.hp.com/gb-en/product/hp-15-d000-notebook-pc-series/6529963/model/6663727/document/c0...

[mickymouse1168]

Thank you for your kind reply and advice. My main problem is this. I have taken out my bloated battery. I am now using A/C current plugged in all the time. I have no intention to buy a new battery. I have other laptops to play with.

Every time, I start this HP laptop (on A/C current) - I face these problems :

1. It will take a long time to start.

2. It will show the "Reset 502" signature warning all the time.

3. Some times it will show that the date and time doesn't change. 

    I can assume that, because there is no CMOS battery inside this laptop, therefore the date and time are not active.

Your kind advice is much appreciated. 

Thank you.

[mickymouse1168]

My final questions !

It is true this HP laptop do not have a CMOS battery ?

I opened up the laptop and couldn't find its location.

If there is one, please let me know where is it located. 

Your kind advice is much appreciated.

Thanking you all in advance.

[Lil_Boy_Blue]

Hi

https://support.hp.com/gb-en/product/hp-15-d000-notebook-pc-series/6529963/model/6663727/document/c0...

I do not know, but I believe there is no CMOS/RTC battery fitted to your model.

[mickymouse1168]

My final response.

First Thing First. I have taken out the bloated battery from this laptop.

It was just over one year, there was no warranty.

I have no intention to buy a new battery. I am using this laptop at home all the time.

I also have other laptops to use them at home. 

I am using A/C current on this laptop all the time. And I repeat, I won't be buying a new battery. Never !

I have tried all the suggestions as recommended, but it was in vain - so to speak.

Like installing, updating or restoring the BIOS,  but it was in vain. 

Oh Yes ! I opened up this HP laptop a few times to locate the CMOS in the motherboard.

And it is now confirmed that there is none.

Finally, I regret to say this. HP is "Not my cup of tea" - so to speak.

Nevertheless, I would like to Thank You for your kind and valuable advice. Much appreciated.

Thank you once again. 

Best regards,

micky.