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battery on motherboard dead?

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#1 Bat5454


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Posted 25 July 2009 - 06:10 AM

I have an old HP desktop (725n) about 6 or 7 years old - every time I unplug it, the time & date get re-set to 2000/01/01.

I'm guessing that the battery on the motherboard is dead & needs to be replaced - Is there any way to confirm thats the problem?

Also - I talked to a guy at a place that sells replacement batteries, he said you have to be very careful replacing
batteries on the motherboard or you could really hose things up -

Is that true? any tips?


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#2 hamluis



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Posted 25 July 2009 - 06:25 AM

Replacing a CMOS battery is normally a very easy thing to do. The one caution I would make is to ensure that you don't break the device which holds the battery in (they vary in design) and...make sure you put the same side up (should be the side with the plus sign) as the original battery reflected.

CMOS Battery Replacement - http://www.liverepair.com/encyclopedia/art...cmosreplace.asp

...and you don't have to write down any settings, just adjust the date/clock after the new one is in.


#3 starcraftmaster


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Posted 25 July 2009 - 09:12 AM

make sure you get the right battery
same model and volts and stuff

#4 garmanma


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Posted 25 July 2009 - 11:50 AM

Also make sure the flat, Plus + side is facing upward

Edited by garmanma, 25 July 2009 - 11:52 AM.

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#5 Bat5454

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Posted 03 August 2009 - 12:24 PM

Thanks all for the replies -

I replaced the battery & it was very simple, and it did correct the problem with the date & time



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