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Please
visit the Home page
for new developments
Instructions
on how to actually unlock your ThinkPad (TP) are in the User's
Guides
EEPROM
Location and Type
T40 T40p T41 T41p T42 T42p you
treat it as 24RF08
Locating the T4xx connection points
Switch the T4xx OFF.
You should have already downloaded the
hardware Maintenance Manual for your ThinkPad model, if you have not done so
use the link below to download it now,
Download
the Hardware Maintenance Manual (HMM) for your TP model
The links above are to the Lenovo site, if it doesn't
work, don't panic, it isn't broken, their site is shut down daily for
maintenance and at those times they display spurious messages like the page
you requested cannot be found, wait a good while and try again.
The 24RF08 eeprom is located right under the network card,
which is under the mouse touch pad, very simple to open, and very simple to
locate the eeprom as well.
Keep individual modules and their screws separate to make it easier to re
assemble it correctly
NOTE: you may have another eeprom installed at location U3, that other
eeprom may be a 93C46, just ignore it.
NOTE: VCC is NOT connected, the ThinkPad
supplies power to the eeprom later on we will switch on the TP to analyse
the eeprom.
The photo below shows a 24RF08 EEPROM from a DIFFERENT
MODEL ThinkPad with the Pomona clips attached to SCL and SDA pins.
See my page on Options
for Clips and Probes including making your own probes.
I receive many emails asking about the GND
connection, in reality it is very simple, you use some kind of a clip so
that you don't have to hold it in place, you DON'T HAVE 3 HANDS and there
are 3 connections, GND SDA and SCL, so have a clip for GND, then you can use
the 2 hands YOU DO HAVE to hold your SDA and SCL probes in place.
Almost any large piece of metal or the screws
for the external connectors of any ThinkPad are a good GND connecting point.
Anyway a picture is worth a thousand words
Click
here for pictures of GND Connections
Keep
things from electrically shorting out, later you will need to plug in the AC
adaptor and switch ON the TP, then you will need to hold 2 probes in place to
the SCL and SDA points on the system board.
See my page on Options
for Clips and Probes including making your own probes.
This page ONLY describes how to connect the
KeyMaker Interface to the EEPROM.
The instructions on how to Recover or clear a
Supervisor password are in The "User's
Guides" click here
Assembling your TP - AFTER - you have finished.
Follow the Hardware Maintenance Manual [FRU System Board],
very carefully, double check screw type and size for each individual module.
Assemble the TP in the reverse order used to dismantle it.
If you have any questions, email Joe at
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