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.
There is more than one way to connect
to the eeprom, it all depends on YOUR SKILLS, lighting and your eyesight
etc.
Make sure you have really good
lighting to see the small pins, a bare 60W globe hanging from the
ceiling high above you in a dark room will make this job impossible.
You could use sharp probes or Pomona
SMD Grabbers to contact the SDA and SCL pins on the EEPROM.
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
Basically
you make the System board functional outside of it's case which includes
mounting heat sink and fan on CPU.
Once
you have taken care of the GND connection.
You
push the sharp probes onto SCL SDA , this is the reason you need 2
persons, not enough hands to hold the probes and run the software.
This is not easy, you will need to have the Keyboard
[and optionally the LCD] plugged into the system board in such a way that
none touch any contacts on the system board, use paper as an insulator to
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.
