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Dell Latitude C840, Model # PP01X Express Service Code # 8716503349 Service Tag # 40KX11

Reset bios password...
Thanking you in advance,
Ray

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  • Dell Expert
  • 352 Answers

Hi Ray Davis,

You may contact the Dell technical support on 18006469896 (U.S only) and prove ownership. They can check and see how they can help you.

Thanks and Regards.
Kiran Kumar.
#iworkfordell.

Posted on Apr 28, 2015

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1. please press F2 into the BIOS setting menu during power up
2. press "ALT+F" to restore factory default
3. press "ESC" and save the change

Posted on Apr 22, 2015

Testimonial: "sorry didn't work...in bios...alt+f2 doesn't do anything..."

  • Ray Davis
    Ray Davis Apr 22, 2015

    sorry didn't work...in bios...alt+f2 doesn't do anything...

  •  johnny rebel
    johnny rebel Apr 23, 2015

    look for factory default setting while you are in bios

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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.
  • Dell Inspiron 5100: eeprom 93lc46, password in scan code at 0x310
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  • Dell D600: eeprom 24c04, password in scan code at 0x110
  • 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.
    • Replace the jumper plug on pins 1 and 2.

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 :-)

Feb 05, 2013 | Computers & Internet

1 Answer

Where do i find the serial number


It is on a small sticker on the bottom of the computer, smaller than that of Microsoft COA. You can find there the service tag and the express service code. you can also check for the service tag in BIOS (press F2 during startup) and you can also check for express service code in start - programs - dell accessories - express service code.

Sometimes the actual serial number is under the battery, but generally all you need is the Service Tag (on the bottom) when dealing with Dell.

Jun 19, 2012 | Dell Latitude E5520 Laptop Computer PC...

1 Answer

How to reset bios of my dell latitude c840????


I've had to do this before. Call up Dell tech support and assuming you can provide proof of ownership then they'll give you the reset code based on what's on the screen when you try to log in to the BIOS.This is the best way to solve that issue.

Even if you cannot prove purchase proof they will give you a reset code. Just contact them removing battery and other suggestions will not work it is a dedicated BIOS on a separate chip. I hope that this gets you pointed in the right direction. Just go to Dell.com Thanks for using FixYa! John

Apr 07, 2011 | Dell Latitude C840 Notebook

3 Answers

Reset password bios c840 dell latitude


Remove the CMOS battery from the motherboard.

Jan 03, 2010 | Dell Latitude C840 Notebook

5 Answers

I FORGET MY DELL LAPTOP BIOS PASSWORD.HOW CAN I OPEN IT


Dell latitude d600, am installing a replacement HDD, when I boot up laptop a screen comes up asking for password authentication system You cannot access the data on this computer without the correct password Please type in primary or administrator password and enter ????? How do I fix this ???? Tony

Nov 01, 2009 | Dell Latitude D600 Notebook

1 Answer

I have a Dell Latitude C800 and i cant get past the power-on BIOS password. Can you please help?


You can get the master password for your Dell by calling Dell Technical Support at (800)624-9896.
Dell Technical Support will request the Service Tag and Express Service Code from the bottom of your Latitude.
If you were not the original owner of the Latitude, Dell will transfer registration of the used Latitude from the original owner with only the Service Tag and Express Service Code from the tag on the laptop.
To transfer the registration of a used Dell Latitude, fill out the Transfer of Ownership form on Dell's web site.

Oct 15, 2009 | Dell Latitude C800 Notebook

2 Answers

Advent 7109a bios password


I cannnot claim ownership of this information:

found on:
http://www.tech-faq.com/dell-bios-password.shtml

Christophe Grenier has written a program that will calculate the master BIOS password for Dell Latitudes from the Service Tag number. That program is available at http://www.users.globalnet.co.uk/~skynet/zips/latitude.exe.
If you cannot boot your Latitude to run this program, you can get the master password for your Dell by calling Dell Technical Support at (800)624-9896.
Dell Technical Support will request the Service Tag and Express Service Code from the bottom of your Latitude.
If you were not the original owner of the Latitude, Dell will transfer registration of the used Latitude from the original owner with only the Service Tag and Express Service Code from the tag on the laptop.
To transfer the registration of a used Dell Latitude, fill out the Transfer of Ownership form on Dell's web site.

Sep 01, 2009 | Dell Latitude D600 Notebook

3 Answers

The administrative password is different in the bios settings


You can reset the password easily by removing the battery which will clear the CMOS. If you aren't comfortable doing this, perhaps you can find someone who will do it for you. It's not hard to do, and you won't hurt anything as long as you unplug the computer and discharge any static from your body. (Just touch something metal - like the rails on your desk or something else.)

Feb 03, 2009 | Dell Latitude D820 Notebook

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