About  this  manual 
This  manual  contains  service  and  reference  information  for 
ThinkPad
®
 
T40/T40p,  T41/T41p,  T42/T42p  series 
(MT2373,  2374,  2375,  2376,  2378,  2379,  2668,  2669, 
2678,  2679,  2686,  and  2687),  and  ThinkPad  Dock  II 
(MT2877)  products.  Use  this  manual  along  with  the 
advanced  diagnostic  tests  to  troubleshoot  problems. 
The  manual  is  divided  into  sections  as  follows: 
v  The  common  sections  provide  general  information, 
guidelines,  and  safety  information  required  in  servicing 
computers. 
v  The  product-specific  section  includes  service,  reference, 
and  product-specific  parts  information.
 
 
Important 
This  manual  is  intended  for  trained  service 
personnel  who  are  familiar  with  ThinkPad  products. 
Use  this  manual  along  with  the  advanced  diagnostic 
tests  to  troubleshoot  problems  effectively. 
Before  servicing  a  ThinkPad  product,  be  sure  to 
review  the  safety  information  under  “Safety  notices: 
multilingual  translations”  on  page  4,  “Safety 
information”  on  page  16,  and  “Laser  compliance 
statement”  on  page  22. 
 
©  Lenovo  2005.  Portions  ©  IBM  Corp.  2005.  1