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[ Up ] [ Your TP Model ] [ TP HM Manuals ] [ Making probes ] [ Soldering to EEPROM ] [ GND Connection ] [ 390 390E 390X ] [ 600 ] [ 600e ] [ 600x ] [ A20 A21 A22 m/p ] [ A30 A30p A31 A31p ] [ G40 G41 ] [ L412 ] [ L512 ] [ R30 ] [ R31 ] [ R32 ] [ R40 ] [ R400 ] [ R50 and R51 ] [ R52 ] [ R60 ] [ R61 R61i ] [ R500 ] [ SL410 ] [ SL510 ] [ T20 T21 T22 T23 ] [ T30 ] [ T40/p T41/p T42/p ] [ T400 ] [ T400s ] [ T410 ] [ T420 ] [ T43 T43p ] [ T500 ] [ T510 ] [ T60 T60p ] [ T61 T61p ] [ W500 ] [ X100e ] [ X200 ] [ X200T ] [ X201 Tablet ] [ X220 ] [ X30 ] [ X31 ] [ X300 ] [ X301 ] [ X40 and X41 ] [ X60 X60s ] [ X60Tablet ] [ X61 X61s X61t ] [ Z60 ] [ Z61 ] [ Other Models ]
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
390 390E 390X you
treat it as a 24RF08
Locating the 390 series
connection points
Switch the 390 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.
Using the HMM link above, once you select a model and
are on the page that has the PDF HMM for that model, it is best to right
click on the PDF HMM for your model then select Save Target AS,
that way you will have the PDF HMM on your PC to refer to any time you
need it.
Locating the eeprom
Using the appropriate TP 390 Hardware Maintenance Manual and your nice small Philips screw
driver, dismantle the TP
Follow the Hardware Maintenance manual
"FRU Keyboard" to lift up your TP's Keyboard and gain access to the
underside of the System Board where the 24RF08 eeprom is located.
The eeprom is directly under the F2 key under the keyboard,
on top of system board, remove led cover plate, undo 2 screws holding
keyboard, pop plastic lock by pushing it backward under the LCD panel hinge,
the lock is just behind the INSERT and HOME keys, it moves backward.
Lift up the keyboard from the end nearest the
LCD, no need to disconnect the keyboard, just lift it to one side, place
a sheet of paper in front of the LCD to protect it and rest the keyboard
against the LCD at an angle.
There in a square hole in the casing under
where the F2 key normally is, you can see the AT24RF08CN 8 pin SOIC eeprom.
 
This is the orientation of the 24RF08CN
on the system Board facing the TP as you would see it normally when operating
it.
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.
The EEPROM is down a hole in the plastic
casing, you may be able to solder to the pins, I have done this many times,
people tell me they can't do it.
You could use sharp probes to contact the SDA
and SCL pins on the EEPROM.
If you wish to use Pomona SMD Grabbers then
you will have to strip the machine down a lot more to remove the plastic frame
above the EEPROM and the reason for doing that is that the Pomona SMD grabbers
need to be at about 30 degrees up from the flat PCB and you cannot achieve that
angle with the plastic frame in the way.
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.
Disclaimer
I make no warranty that any of my
information is correct, or safe, or does or does not breach any warranty
clause, or anything else, it is up to you to decide if you will
follow all or any of the instructions to recover the Supervisor Password
from a TP. It is up to you to decide, I am not responsible for the
results or for any consequential or incidental damages whatsoever.
If you have any questions, email Joe at
[ Home ] [ Up ] [ Your TP Model ] [ TP HM Manuals ] [ Making probes ] [ Soldering to EEPROM ] [ GND Connection ] [ 390 390E 390X ] [ 600 ] [ 600e ] [ 600x ] [ A20 A21 A22 m/p ] [ A30 A30p A31 A31p ] [ G40 G41 ] [ L412 ] [ L512 ] [ R30 ] [ R31 ] [ R32 ] [ R40 ] [ R400 ] [ R50 and R51 ] [ R52 ] [ R60 ] [ R61 R61i ] [ R500 ] [ SL410 ] [ SL510 ] [ T20 T21 T22 T23 ] [ T30 ] [ T40/p T41/p T42/p ] [ T400 ] [ T400s ] [ T410 ] [ T420 ] [ T43 T43p ] [ T500 ] [ T510 ] [ T60 T60p ] [ T61 T61p ] [ W500 ] [ X100e ] [ X200 ] [ X200T ] [ X201 Tablet ] [ X220 ] [ X30 ] [ X31 ] [ X300 ] [ X301 ] [ X40 and X41 ] [ X60 X60s ] [ X60Tablet ] [ X61 X61s X61t ] [ Z60 ] [ Z61 ] [ Other Models ]
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