Switch the T400 OFF.
You should have downloaded the hardware Maintenance
Manual already, if you have not done so,
Click on the hyperlink below to download the
PDF file containing the T400 Hardware Maintenance Manual, you will need to
install Adobe Acrobat Reader to view the manual, Adobe Acrobat is FREE and can
be obtained here -> Adobe
Downloads once you have downloaded the files, close the browser window to
return to this page.
Click
here for ThinkPad T400 Hardware Maintence manual
It is best to Right Click on the PDF links then Save
"Target as" that way you will have a copy of the PDF file on your
PC.
Once you have your HMM search the manual for
"Removing and replacing a FRU" then scroll down to System Board,
follow the
instructions in the manual to remove all the other FRUs to gain access to and
remove the System Board.
Keep individual modules and their screws separate to make it easier to re
assemble it correctly
You need to access the 8 pin chip, a
P24S08 eeprom which is located on the system board IC number U77 as illustrated below.
You need to re-assemble your TP as you will have to have it
switched ON and running to read the eeprom.
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
