Replace CMOS battery

I have a Satellite M35X-S349 laptop and it appears the CMOS battery is dead. When activating the power switch, the hard drive attempts to load but then stops. The BIOS will not load, which makes me think that the CMOS battery is dead. I need a service manual or someone to tell me how to get to the CMOS battery. Any info will be appreciated.
Thanks
Ross

Hi,
Please use the following manual (page #2-63):
http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c01122313/c01122313.pdf
Regards.
BH
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Hi, not sure if im posting in the right place but trying to find out how to replace cmos battery in a g6 1001-sa.
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Please I need help on how to replace CMOS battery for dv4 - 2165dx notebook pc.
This question was solved.
View Solution.

foanti wrote:
Please I need help on how to replace CMOS battery for dv4 - 2165dx notebook pc.
Hi,
Page 54 in this manual: http://h10032.www1.hp.com/ctg/Manual/c01963667.pdf
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Hi, Part number is : 449137-001 as shown on page 49 of the second manual on the following link: http://support.hp.com/us-en/product/HP-Pavilion-g6-Notebook-PC-series/5082228/model/5128909/manuals/ You can buy from HP or: http://www.amazon.com/HP-449137-001-Battery-real-time-clock/product-reviews/B002GPKBRO (Actually it is a CR2032 battery). Regards.

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Im afraid the RTC battery is soldered to the motherboard. Dont think you could remove it easily.
What you can do is to charge the battery.
In order to charge the RTC battery successfully, the main battery and AC adaptor have to be connected to the notebook. Additionally the notebook has to be powered ON for about 18-20 hours.
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i have big problems with my satellite A30-504...it does'nt see the HDD on boot, my only solution so far was to press the power button for many times.
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Hi Adrian
CMOS battery is always placed an awkward position and to exchange the battery the unit must be disassembled. If you didnt done this before please dont do this alone. A small mistake and you can damage plastic cover of the unit.
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on an older computer i was asked to fix i entered BIOS and while trying to change the boot order i deleted the hard drive from the boot options completely and couldnt get it back. So in an attempt to fix that i took out the cmos battery and put it back in. the monitor now has a check signal cable message up whenever i turn the computer on.....ive tried different monitors and cables resulting in the same thing.

Smo1898, welcome to the forum.
When requesting help you should always include the make/model of the computer and/or monitor. This information is necessary for us to review the specifications of them.
This is a strange problem. I can't imagine what removing and replacing the CMOS battery would have to do with the monitor losing its signal. Have you tried reinstalling the driver for the monitor?
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After Replacement cmos battery R40

Good morning, i have i Thinkpad R40 to repair. He has a problem with date and time.
I replace the cmos battery with ref panasonic cr2032 lithium battery ibm p/n 02k6541 fru p/n 02k6572.
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richk read my mind, I know I've seen a post about exactly that point somewhere, but can't find it.
The correct FRU for the CMOS battery is 92P0991. If suspicions are correct the one you have fitted is for quite a lot of ThinkPad models, but the R40 had the same battery with reversed polarity.
Andy ______________________________________
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Hi there tfflivemb2
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Hello @okomanuel ,
Welcome to the HP Forums!
I understand you have questions about the CMOS battery for your G62 notebook.
Not having a CMOS battery in the notebook will not stop it from booting or displaying a POST screen. The battery only stores changes to the default BIOS configuration.
Are you able to view the POST screen when turning on the notebook, or is it completely blank? Have you tried an external monitor? Can you hear the HDD spinning when turning on the notebook?
If you can hear the HDD spin or see the HDD light blinking it would indicate the drive is recognized by the motherboard and CMOS should not have a factor in why you cannot boot. If the drive does not spin or blink the BIOS default settings may not apply to your current configuration and could explain why it is not working.
If you want to order a replacement CMOS battery you can order it with the following part number: 606015-001
Hopefully this helps!
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can you remove the bottom panel of the laptop?
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Hi buddy
In order to replace the CMOS battery you will have to disassemble the whole notebook.
Do you really want to risk this?
I mean the whole notebook should be disassembled in the right direction and you should use the right tools and right order
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CMOS battery is needed to keep the BIOS settings saved.
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Hi,
You can buy from HP (part #449729-001) for US$44.8 as shown in the following link:
http://h20141.www2.hp.com/Hpparts/Search_Results.aspx?mscssid=2FE7EF80A8C64E0199E13B411E60D911&Searc...
or you can buy a CR2032 battery from every where for aroound US$3.00 (3 bucks). It's your choice.
You also need the following manual which show you where and how to put a new battery to your machine.
http://h10032.www1.hp.com/ctg/Manual/c01705400.pdf
Regards.
BH
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Replace CMOS battery

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