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Install battery on dell latitude C640 laptop

I do not know where the battery goes HELP

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The reserve ( or CMOS ) battery for this model is attached to the motherboard. To gain access to this, you must first remove all of the following....

Remove the following components first:

Then you will have access to the battery. see photo.
install battery on dell latitude C640 laptop - 6a7f6a4.jpg
If you are not familiar with Laptop disassembly and repair, this is a huge job, and you may want to consider having a technician install this for you.

Please take a moment to rate this as "fixya" if you feel I have answered your question.

Thanks for using Fixya,

Posted on Oct 17, 2008

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Dude, Can you send me a Bootable ISO CD of Dell Asset/Service Tag BIOS Reset Tool........Please


Hello, you can download this tool here:

http://www.cgsecurity.org/wiki/CmosPwd

Dell

The official method is to contact Dell Technical Support. Dell Technical Support will request the Service Tag and Express Service Code from the bottom of the Latitude. If the current user is not the original Latitude owner, Dell will transfer the used Latitude's registration from the original owner with only the Service Tag and Express Service Code from the tag on the laptop.
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  • Dell Optiplex: Remove the PSWD jumper
  • For most Dell Dimension desktops, the steps to reset a BIOS password and clear all CMOS settings are:
    • Locate the 3-pin CMOS password reset jumper on the system board.
    • Remove the jumper plug from pins 1 and 2.
    • Place the jumper plug on pins 2 and 3 and wait approximately 5 seconds.
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Try the backdoor password: Dell

The another method is: by Using the Motherboard Jumper: In most motherboards CMOS battery is soldered, which makes it difficult to remove the battery. In this case we use another method.
Almost all motherboards contain a jumper that can clear all CMOS settings along with the BIOS password. The location of this jumper varies depending upon the motherboard brand. You should read your motherboard manual to check its location. If you don't have the manual then look for the jumpers near the CMOS battery. Most of the manufacturer label the jumper as CLR, CLEAR, CLEAR CMOS, etc.
When you find the jumper, look carefully. There will be 3 pins and the jumper will be joining the center pin to either left or right pin. What you need to do, is remove the jumper and join the center pin to the opposite pin. e.g. if the jumper joins center pin to left pin, then remove it and join center pin to right pin. Now wait for a few seconds and then again remove the jumper and join the center pin to left pin.
Make sure to turn the PC off, and remove the battery and power cord
( if it is a laptop ) before you continue.

Here is a picture how it looks like:


2_5_2013_1_59_52_am.jpg
The default setting is:pin 1 to 2, to clear cmos: 2 to 3.

Best of luck :-)

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