How to unlock Dell Latitude Administrative passwords

How to unlock Dell Latitude Administrative passwords

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Posted by c4 on November 21, 2001 at 16:16:11:

In Reply to: Re: DELL LAPTOP HELP!!!!!!!!!! posted by dave on September 27, 2000 at 17:28:04:

Ok, this is what to do.

1) dismantle your laptop, under the CPU module there is an 8 pin IC, a 24c02 eeprom. This is where the password lives, - not in the bios chip.

2) unsolder the chip, taking care not overheat the board, or the ic.

3) construct a basic programming circuit, you can find information by searching for "eeprom programmer free". I used ponyprog and itinerant hardware, ie 3 5V zener diodes, 3 resistors, some cable , a 9pin d connector (serial port) a 5v power supply and a decoupling cap.

4) try reading the eeprom when you have hooked it up to another machine - this will test to see if the programmer circuit is working. you should get a file of 256 bytes. In amongst these bytes you will see the service tag of the laptop, and a whole lot of zeros and some random characters.

5) write all 00s to the eeprom - this effectively erases it.

6) desolder the eeprom from the programming circuit, and reinstall it on the laptop mainboard. Make sure you get it square on the pads, dont use too much solder, and make sure it is the right way around!

7) Reassemble the laptop. At power on you will see a message like "Factory Mode, press Fn X to exit." Do it.

8) Home and Hosed.

Under no circumstances must this procedure be performed on a stolen Dell Laptop, as it will explode when you press Fn X. Dell's security measures are legendary.

P.S. On later model Latitudes, (pentium IIIs) the eeprom is not under the CPU module, but elsewhere on the main board. Look for it - it is there.

P.P.S. Please don't email me for more info - I have given all that I have time to give - you should seek advice from your friendly electronics guru if you need it.

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