ThinkPad 240 Hardware

Maintenance Manual

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 fivealphanumeric charactersare "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 fivelettersare "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:

ŸThe introduction section provides general information, guidelines, and safety information required to service computers.

ŸThe 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

Ÿ

Only

certified trained personnel should service

 

the

computer.

ŸRead the entire FRU service procedures before replacing any FRUs.

ThinkPad 2401

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IBM S09N-8590-00 manual ThinkPad 240 Hardware Maintenance Manual, Read This First