dell latitude e4300 remove bios password
February 3rd, 2020
I tried the “paper clip” way but i can’t locate the eeprom. thanks!
I tried the "paper clip" way but i can't locate the eeprom. thanks!
whats the paper clip way?
open your pc:
http://www.youtube.com/watch?v=cmHtjY39iLU
I tried the "paper clip" way but i can't locate the eeprom. thanks!
whats the paper clip way?
open your pc:
http://www.youtube.com/watch?v=cmHtjY39iLU
All computers have special chips inside them that store information about the computer.
Some of them are manufactured with permanent information that can not be changed (and, as a rule,
all have exactly the same information on them; thus not for passwords.) These contain information
about the computer model or are part of its functional circuitry.
Another type of chip (the kind we are interested in) is manufactured with a blank information area that
can be programmed or filled with information. These chips are commonly used to store settings and
passwords; and come in 2 basic sorts: VOLATILE and NON-VOLATILE.
VOLATILE chips use a source of electricity to help them keep their information, such as a battery.
They are less expensive and are used to store computer settings, and also passwords on most
computers. If one of these chips has a password on it, the battery can be removed and after a time
(between 2 seconds to 30 minutes, depending on the chip) the password will be erased.
NON-VOLATILE chips do not need electricity to keep their information, but are more expensive. If
there is a password on one of these chips, it can be removed from power for years and still have the
password on it. (However this does not mean that it is permanent.) Remember that the information on
Non-Volatile chips can be filled with information. This information can also be changed or erased.
If you have read this far you probably own a Dell or similar laptop with a password that is obviously
stored in a Non-Volatile chip, or are an employee of a company that makes one. These laptops have
most of their setting information stored in Volatile (inexpensive) chips, and their passwords are stored
on a tiny Non-Volatile (more expensive) chip.
The chip that Dell uses is called a 24C02 chip(eeprom chip).
This is the Chip Type number used to refer to the chip’s design in the electronics industry.The 24C02 is a small, rather common surface mount* dip* chip with 8 leads (or legs), which costs
about $5. It measures 4.5 mm long x 3.5 mm wide x 2 mm tall, and stores 256 Bytes (or one quarter of
a Kilobyte) of information. It is commonly used in modems, DIMM Memory, and other electronic
devices; and in a different shape it is used in many wallet sized “smart cards.” * SURFACE MOUNT
means that the chip is soldered onto the surface of the printed circuit, instead of having pins sticking
through the board. This is the most difficult type of circuitry to solder by hand.
* DIP means ‘Dual Inline Package’. This means that the chip has 2 rows of leads (or legs) in straight
lines running down its sides……….and this eeprom chip can be short circuited with the help of an paper clip, deleting in this way the information stored on the chip.(exemple: for dell latitude xpi model:The EEPROM chip 24c02 is on the backside
of the motherboard behind the PCMCIA
slots. Short circuit Pin 3 and 6 wile booting)
by shorting the eeprom will not work on these models the only way to get the password is from dell or from thease 2 wedsites www.spunlock.com or www.biosmasters.com
all laptops from 2006 and up have new bios system. by shorting the eeprom will not work or by removing the battery will not work. so if you want you can email them with your service Tag number which will look like this XXXXXXX 595B or XXXXXXX 2A7B.
they will email you the master password for your machine.