Dell Latitude CPX - Notebook Repair Manual download pdf (Page 69)

The information in the chip can be read / written with a special device called an EEPROM reader or

programmer; or a PICprog (Programable Integrated Circuit programmer.)

Devices like these can be purchased for around $100 or less, and [with a some time and quite a bit of

reading for those new to electronics or programming] used to read, write, or manipulate the

information in EEPROM chips. It is also possible to build your own circuit with a little know how, the

right chips, and a few hobby electronics supplies. There are a number of places on the internet where

these products or materials can be found; as well as instructions on how to build or use them.

I have heard that chips in Dell laptops contain the password, and 2 tags in standard IBM type

Scancode format (there are different standard scancode formats.) I have not verified this yet, but hope

to get a PIC reader and check this sort of thing out sometime soon.

Scancode is a code (binary byte or word) sent by the keyboard to the computer. The computer then

uses this code to interpert what the user is doing on they keyboard. A certian code is sent each time a

key is pressed and another when it is released. This is how key combinations such as Ctrl + Alt + Del

can be pressed at the same time without conflicting with each other's signals.

Disclaimer

This information is provided as an "At Your Own Risk" procedure. I can not absolutely assure that it is

safe for any or all equipment, with any make of materials, or under any or all environmental or working

conditions. If you perform this procedure on a product belonging to you or another person, you do so

at your own risk and liability. Also you are responsible for taking any safety precautions that may be

necessary to protect yourself and the equipment you may be working on, or which may subsequently

be affected by this procedure. You are also responsible for any breach of law or contract which would

occur by your decision to undertake this procedure.

This information and procedure are not sponsored, endorsed, authorized, or condoned by; and are

probably criticized or condemned by any and all of the following: Dell; any of their affiliates; any other

manufacturer of laptops, electronic devices or equipment, screwdrivers, or paperclips.

Also; I can not be held liable for any ill effects brought about from natural responses of humor resulting

from reading of this site, or its content, regardless of the form of humorous reaction. This shall include

but not be limited to: laughing, chuckling, giggling, or snorteling.

If specified procedure don´t work,

Try to short the marked pins, red, yellow or purple directly after you pushed the power button.

Try to short the marked pins, red, yellow or purple and push the power button.

Try to short the marked pins and push the power button, when cursor flashes release.

Try to short to different times of booting and release to different times.

Take out the hdd and use a ac adapter!

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Dell Latitude CPX - Notebook Repair Manual Page 69