IBM ThinkPad 240 User manual

i

Before using this information and the product it supports,
be sure to read the general information under “Read This
First” on page 1.
Second Edition (October 1999)
The following paragraph does not apply to the United
Kingdom or any country where such provisions are
inconsistent with local law:
INTERNATIONAL BUSINESS MACHINES CORPO-
RATION PROVIDES THIS PUBLICATION "AS IS"
WITHOUT ANY WARRANTY OF ANY KIND, EITHER
EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED
TO, THE LIMITED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. Some states do not allow disclaimers or
express or implied warranties in certain transactions; there-
fore, this statement may not apply to you.
This publication could include technical inaccuracies or
typographical errors. Changes are periodically made to the
information herein; these changes will be incorporated in
new editions of the publication. IBM may make improve-
ments or changes in the products or the programs
described in this publication at any time.
It is possible that this publication may contain references
to, or information about, IBM products (machines and pro-
grams), programming, or services that are not announced
in your country. Such references or information must not
be construed to mean that IBM intends to announce such
IBM products, programming, or services in your country.
Requests for technical information about IBM products
should be made to your IBM Authorized Dealer or your
IBM Marketing Representative.
 Copyright International Business Machines Corpo-
ration 1999. All rights reserved. Note to US Government
Users — Documentation related to restricted rights — Use,
duplication, or disclosure is subject to restrictions set forth
in GSA ADP Schedule Contract with IBM Corp.

Contents
ThinkPad 240 Hardware Maintenance Manual .. 1
Read This First .................. 1
What to Do First ................ 2
How to Disable the Password ......... 3
Product Overview . . . . . . . . . . . . . . . . . 4
Fn Key Combinations ............. 5
Status Indicators . . . . . . . . . . . . . . . . 6
Checkout Guide . . . . . . . . . . . . . . . . . 7
Audio Checkout . . . . . . . . . . . . . . . . 8
Fan ASM Checkout .............. 8
Keyboard and Auxiliary Input Device Checkout . 9
Memory Checkout . . . . . . . . . . . . . . . 9
Modem Board Checkout ............ 10
Power System Checkout ............ 10
TrackPoint Checkout . . . . . . . . . . . . . . 12
I/O Ports Checkout .............. 13
Power Management Features ......... 13
Symptom-to-FRU Index . . . . . . . . . . . . . . 16
Numeric Error Codes .............. 16
Error Messages . . . . . . . . . . . . . . . . 18
No Beep Symptoms .............. 19
LCD-Related Symptoms . . . . . . . . . . . . 19
Keyboard-Related Symptoms . . . . . . . . . . 19
Indicator-Related Symptoms . . . . . . . . . . 19
Power-Related Symptoms . . . . . . . . . . . 20
PC Card (PCMCIA)-Related Symptoms ..... 20
Speaker-Related Symptoms . . . . . . . . . . 20
Power Management-Related Symptoms ..... 20
Peripheral-Device-Related Symptom . . . . . . 21
Intermittent Problems . . . . . . . . . . . . . 21
Undetermined Problems . . . . . . . . . . . . 22
CE Utility Program Diskette ............ 23
Writing the VPD Data ............. 23
Flash UUID . . . . . . . . . . . . . . . . . . 23
Running the Diagnostics .............. 23
FRU Removals and Replacements ......... 24
FRU Service Procedures ............ 24
1010 Battery ASM ............... 26
1020 Hard Disk Drive ............. 27
1030 Keyboard . . . . . . . . . . . . . . . . 28
1040 Modem Card ............... 30
1050 DIMM Card ............... 31
1060 LCD Unit ASM .............. 32
1070 Upper Cover ASM ............ 34
1080 Speaker ASM .............. 36
1085 Select Button ASM ............ 37
1090 Cable ASM and Cable ASM LED-R .... 38
1100 Fan ASM ................ 39
1110 Modem Cable ASM ............ 41
1120 Water Channel ASM ........... 42
1130 System Board .............. 43
Contents iii

1135 Rear Bracket ............... 45
1140 PCMCIA Slots .............. 46
1150 LCD Bezel ASM ............. 47
1160 LCD Inverter ASM ............ 48
1170 LCD Panel ASM (LCD Type A and B) . . . 49
1180 LCD FPC ASM (LCD Type A) ....... 51
1185 LCD FPC ASM (LCD Type B) ....... 52
1190 Hinge ASM ............... 53
Computer Parts Listing .............. 54
LCD Unit Parts Listing (LCD Type A) ........ 58
LCD Unit Parts Listing (LCD Type B) ........ 59
Service Tools . . . . . . . . . . . . . . . . . . . 59
Notices . . . . . . . . . . . . . . . . . . . . . . 61
Trademarks . . . . . . . . . . . . . . . . . . . 61
iv ThinkPad 240

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 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

Use new nylon-coated screws when you replace
FRUs.
Be extremely careful during write operations such
as copying, saving, or formatting. Drives in the
computer that you are servicing might have been
rearranged or the drive startup sequence might have
been altered. If you select an incorrect drive, data or
programs might be overwritten.
Replace FRUs only for the correct model. When
you replace a FRU, make sure the model of the com-
puter and FRU part number are correct by referring to
the FRU parts list.
A FRU should not be replaced because of a
single, unreproducible failure. Single failures can
occur for a variety of reasons that have nothing to do
with a hardware defect, such as: cosmic radiation,
electrostatic discharge, or software errors. FRU
replacement should be considered only when a recur-
ring problem exists. If this is suspected, clear the
error log and run the test again. Do not replace any
FRUs if log errors do not reappear.
Be careful not to replace a non-defective FRU.
What to Do First
The servicer must include the following in the parts
exchange form or parts return form that is attached to the
returned FRU:
1. Name and phone number of servicer
2. Date of service
3. Date when part failed
4. Date of purchase
5. Failure symptoms, error codes appearing on the
display, and beep symptoms
6. Procedure index and page number in which the failing
FRU was detected
7. Failing FRU name and part number
8. Computer type, model number and serial number
9. Customer's name and address
Before checking problems with the computer, determine
whether or not the damage applies to the warranty by
referring to the following:
Note for Warranty: During the warranty period, the cus-
tomer may be responsible for repair costs if the computer
damage was caused by misuse, accident, modification,
unsuitable physical or operating environment, or improper
maintenance by the customer. The following list provides
some common items that are not covered under warranty
2ThinkPad 240

and some symptoms that may indicate that the system
was subjected to stresses beyond normal use:
The following is not covered under warranty:
LCD panel cracked by applying excessive force or
from being dropped
Scratched (cosmetic) parts
Cracked or broken plastic parts, broken latches,
broken pins, or broken connectors caused by exces-
sive force
Damage caused by liquid spilled into the system
Damage caused by the improper insertion of a PC
Card or the installation of an incompatible card
Damaged or bent PC Card eject button
Fuses blown by attachment of a non-supported
device
Forgotten computer password (making the computer
unusable)
The following symptoms might indicate damage caused by
non-warranted activities:
Missing parts might be a symptom of unauthorized
service or modification.
Hard disk drive spindles can become noisy from
being subjected to excessive force or from being
dropped.
How to Disable the Password
There are three passwords used at a typical customer site:
the Supervisor Password, the hard disk drive password,
and the Power On password.
Power On password:
1. Power off the computer.
2. Remove the battery pack and AC Adapter.
3. Open the keyboard and disconnect the keyboard
connector from the system board, see “1030
Keyboard” on page 28.
4. Short the jumper JP1. See the following figure:
ThinkPad 240 3

5. Close the keyboard.
6. Power on the computer and wait until POST
ends.
7. Verify that the password prompt does not
appear.
Supervisor and hard disk drive passwords:
The Supervisor Password and hard disk drive pass-
word are security features that are used to protect the
system and the hard disk drive data from unauthor-
ized access. No overriding capability is provided, so it
cannot be replaced if they are forgotten. If the cus-
tomer forgets the Supervisor Password, the system
board must be replaced. If the customer forgets the
hard disk drive password, the hard disk drive must be
replaced.
Product Overview
The following shows an overview of the system features of
the ThinkPad 240 computer.
Feature Description
Processor Intel** Celeron** processor
366 MHz, 128KB L2 cache
Bus architecture PCI Bus
Memory 64 MB SDRAM onboard only
32 MB, 64 MB or 128 MB DIMM
card (max. 192 MB)
BIOS ROM up to 512 Kbytes
Video 10.4–inch, 16M colors,
800x600 pixel TFT color LCD
4ThinkPad 240

Feature Description
Audio 16–bit audio
Internal speaker
Internal microphone
Hard disk drive 3.2/6.4GB, 2.5–inch, IDE
interface
I/O ports External monitor
Headphone/line-out
Line-in
Microphone-in
Mouse/keyboard
Parallel
Serial
USB
RJ11
External diskette drive
Infrared transfer IrDA 1.1
Internal modem 56Kbps (depends on the model)
PC Card (PCMCIA) One Type II
CardBus support
AC Adapter 56–Watt type
Fn Key Combinations
The following table shows the Fn key and function key
combinations and their corresponding functions.
The Fn key works independently of the operating system.
The operating system obtains the status through the
system management interface to control the system.
Fn + Result
F3 Standby mode
F4 Suspend mode
F5 Decrease brightness
F6 Increase brightness
F7 Switch between the LCD, the external monitor,
and both the LCD and external monitor.
F8 Switch power mode
F9 Hibernation mode
F10 Print screen
F11 Scroll lock
F12 Pause
0 (zero) Activates the system request function
-
(minus) Enables the numeric keypad
= Signals a break
ThinkPad 240 5

Fn + Result
Up
arrow Page up
Down
arrow Page down
Left
arrow Home
Right
arrow End
Insert Decreases the internal speaker volume
Delete Increases the internal speaker volume
Back-
space Mutes the internal speaker
Status Indicators
The system status LED indicators show the current com-
puter status. The following shows the location of each indi-
cator symbol and the meaning of each indicator.
ThinkPad
Symbol Color Meaning
(1) Battery status Green Enough battery power
remains for operation.
Blinking
orange The battery pack needs to be charged.
Orange The battery pack is being
charged.
(2) Suspend
mode Green The computer is in suspend mode.
Blinking
green The computer is entering suspend mode.
6ThinkPad 240