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Trying to find CMOS battery in a Compaq Presario C500

post #1 of 17
8/30/09 at 1:34pm
Thread Starter 
i am attempting to replace the CMOS battery in my presario; however, i can't seem to find it. i have tried to search for the service manual for this model but could not find it. i looked at the service manual for the C300 series and it indicated that the CMOS was under the memory module, but it isnt in the same place in mine. any help is greatly appreciated!!
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post #2 of 17
8/30/09 at 1:41pm
Would this work for you?

http://www.eserviceinfo.com/download...MPAQ_C500.html

cheers ...
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post #3 of 17
8/30/09 at 1:53pm
Thread Starter 
i will check it out. thanks alot!
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post #4 of 17
8/30/09 at 2:03pm
Cool. Take a pic of the CMOS position and share, if you would. Good lucks.

cheers ...
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post #5 of 17
8/30/09 at 2:34pm
Thread Starter 
ok, i looked at it and it is the service model for the C300 series...the site says it can be used for the C500 but i already looked where it says the CMOS should be and it isn't there.

its funny its so hard to find, but it only cost $4 to replace
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post #6 of 17
8/30/09 at 2:44pm
So it is not under the memory or the wifi card bay/slot?

cheers ...
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post #7 of 17
8/30/09 at 4:41pm
Thread Starter 
it isnt under the memory card. where is the wifi card?
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post #8 of 17
8/30/09 at 4:51pm
You probably don't have one, but look around if you have an empty bay somewhere.

Also look at 5-47 (chapter/page), there is a pic there with a foot print of the CMOS battery next to it. Maybe that is where it is being situated.

cheers ...
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post #9 of 17
3/11/11 at 6:16am
you are right, be work out...
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post #10 of 17
4/18/11 at 11:16pm
you will have to take the computer completely a part here is a picture and you can see the battery just to the right of the memory sockets

500
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post #11 of 17
4/19/11 at 3:56am
Thread Starter 
ok thanks alot!!
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post #12 of 17
4/21/12 at 9:14pm

This thread is old but thought I'd would share this. You don't have to take the whole computer apart... Just take the Memory Cover off theres a chip there with 2 wires coming from it just remove the 2 little screws and the cmos battery is located underneath that... Just an FYI... Jp 

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post #13 of 17
4/22/12 at 2:22am
Quote:
Originally Posted by Frantik775 View Post

This thread is old but thought I'd would share this. You don't have to take the whole computer apart... Just take the Memory Cover off theres a chip there with 2 wires coming from it just remove the 2 little screws and the cmos battery is located underneath that... Just an FYI... Jp 

A good FYI thumbup.gif

cheers ...
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post #14 of 17
4/25/12 at 6:17pm
Blah, how did I miss a C500 post? XD

Anyway, yeah, just remove the wireless card after removing the memory cover. Additional bit of info: It's a standard C2032/CR2032 watch battery, same as most desktop boards.

Gone (for the most part) are the days of proprietary CMOS battery connections, thank god.

Regards,
O Shadow Fox O
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post #15 of 17
11/17/12 at 10:30am

Hi there, I was looking for the location of this CMOS battery in the Compaq Presario C500 but this information was hard to get. Unbelivable!!, but thanks to you response I was able to replaced it. I just removed those 2 small screws from the memory cover, the Wi-FI card was next to the memory chips, I removed the WI-FI card (there are 2 small screws retaining the card), put it aside with the 2 wires still connected, and the CMOS battery was there. I removed it carefully and replaced with the new one, put the Wi-Fi card back and put back the screws, closed the memory cover and all done!

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post #16 of 17
1/15/13 at 5:13pm

Glad to hear you got it figured out! Yea it's funny it's a cheap replacement but a pain to find if you never done it b4 lol!

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post #17 of 17
4/22/13 at 11:41pm

Had exactly the same problem .. nearly stripped the whole machine trying to find CMOS battery!

 

The info here worked a treat .. done in two minutes!

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