About This Manual
This manual contains service and reference information for
the IBM ThinkPad 240 products. Use this manual along
with the diagnostics tests to troubleshoot problems effec-
tively.
There are two models of LCD panel used with the
ThinkPad 240: LCD Type A and LCD Type B. Check the
last five letters of the unit's serial number you are servicing
to determine the model.
LCD Type A:
All ThinkPad 240 computers that have serial numbers
whose last five
alphanumeric characters
are "00001" to
"YZZZZ" are fitted with Type A panels.
Note: The number range is from 00001 to 99999, and the
letter range is from AAAAA to YZZZZ.
LCD Type B:
All ThinkPad 240 computers that have serial numbers
whose last five
letters
are "ZAAAA" to "ZZZZZ" are fitted
with Type B panels.
The servicer need only check the fifth letter from the end.
If the fifth letter from the end is "0 — Y" (inclusive), then
the LCD panel is Type A. If the fifth letter from the end is
"Z", then the LCD panel is Type B.
The manual is divided into sections as follows:
The introduction section provides general information,
guidelines, and safety information required to service
computers.
The product-specific section includes service, refer-
ence, and product-specific parts information.
This manual is intended for trained servicers who are
familiar with ThinkPad products. Use this manual along
with the PC Doctor to troubleshoot problems effectively.
Read This First
Before you go to the checkout guide, be sure to read this
section.
Important Notes
Only certified trained personnel should service
the computer.
Read the entire FRU service procedures before
replacing any FRUs.
ThinkPad 240 1