Hello, you can download this tool here:http://www.cgsecurity.org/wiki/CmosPwd
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
- Dell Inspiron 7500: eeprom 24c164
- Dell Inspiron 8100: eeprom 24c02
- Dell Latitude C600: eeprom 24c02, password in scan code at 0x00, 0x10 and 0x90
- Dell Latitude C610: eeprom 24c02, password in scan code at 0x00, 0x10, 0x80 and 0x90
- Dell Latitude C640: eeprom 24c04, password in scan code at 0x100 and 0x180
- Dell Latitude CPI: eeprom 24c02, password in scan code at 0x00, 0x10, 0x80
- 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:
The default setting is:pin 1 to 2, to clear cmos: 2 to 3
Best of luck :-)