Question about Dell Latitude C640 Notebook

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Laptop I bought a motherboard from someone and I cannot change the time in the Bios because there is admin password how do I clear that password.

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  • Anonymous Feb 16, 2008

    I remove the bios and battery and when I turned it on it ask me for the administrator password

  • medicadgk Jul 15, 2008

    I have dell latitude c640 asking bios password, how can i clear this password



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Remove the battery and remove the bios. reinsert the bios and battery if that dont work there is jumbers on the board you have to remove check your motherboardsmanual online.

Posted on Feb 16, 2008


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Related Questions:

1 Answer

How do you get the bios password ?

Well, a BIOS password can be removed by either clearing the CMOS jumper or removing the CMOS battery on the motherboard.

On a regular computer this isn't too difficult, but unless you have taken apart your laptop before or are willing to try it, I would take it to someone you trust to work on your computer. Clearing the CMOS of a laptop generally requires near complete disassembly.

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if you are getting prompt, "This computer <Service tag number>-595B is password protected ..... you'll need to call Dell technical support to get the master password generated to clear the message. There is no hardware way to clear the password short of replacing the motherboard. Same applies for a BIOS level Hard Drive Password.

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I need to reset the admin bios password on my dell Latitude D430 laptop. Removing the battery does not work...the screen code is 250R43J-595B. Please can someone help? I know there is a converter...

As a laptop repair tech I use when I need to clear a Dell bios password. They charge $20 and guarantee it to work or your money back. Use them couple times a month and they always come through.

Aug 03, 2011 | Dell Latitude D430 Notebook

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I forgot my BIOS password and i can't access it becos i don't know the password.

HP Spare Key can be used to reset BIOS password. It is provided by HP Corporation. So when you forgot BIOS password on HP computer, just download it and get perfect BIOS password reset.
How to reset HP bios password with Spare Key or other ways?

Please refer to reset HP Elitebook password. In this passage, you also can learn how to reset Windows administrator password easily.

Jun 12, 2011 | HP Compaq 6730s Notebook

1 Answer

Cannot clear bios password

Hi, you won't be able to, Dell has put it there to stop people from messing with the bios.
You can phone Dell and they may tell you the password, but you will have to go through some security check to prove that the laptop is yours.

If you know how to take your laptop apart ( not recommended ) you can follw this guide :-

Disconnecting the battery for a few minutes should clear the bios and return to default settings.

Let me know if this has helped you.

Regards - Anthony

Feb 08, 2010 | Dell Latitude C610 Notebook

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How to clear BIOS password on ACER Travelmate 5720 Laptop


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User Password

For this issue I have had myself. First and foremost the best solution is to flash the notebook, clear EVERYTHING out, most tech. support locations are able to this, with no problem, OR you may also try, f you can get into the BIOS, there should be an option to "Load Defaults". Choose that and then "Save and Exit". If you cannot get into the BIOS because you do not know the password, look for a jumper on the motherboard marked "Pass", "PWD", "BIOS", etc. Typically you should move the jumper over one pin, or it may have just two pins, and they need a shorting jumper on them. Do that for a few seconds, and replace it as you found it. That should clear the password, and perhaps all other non-default settings, as well.
Let me know how it goes,
Please Rate Me

Jan 15, 2009 | Toshiba Satellite 1415-S173 Notebook

1 Answer


clear the cmos, or remove the battery for a few minutes, that will clear any bios password


Dec 13, 2008 | Dell Latitude C640 Notebook

2 Answers

Bios password

if you know the password, then when you go to change it instead of entering a new password just press enter on the keyboard. If you don't know the password try, admin or administration or even the word password.

Oct 30, 2008 | Acer Aspire 5520-5908 Notebook

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Acer ASPIRE 4720z laptop

sorry to tell you that you will need to reinstall windows.

thats the only way


Jul 29, 2008 | Acer Aspire 9300 Notebook

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