IBM ThinkPad 240 Service Manual

IBM Mobile Systems

ThinkPad 240

Hardware Maintenance Manual

December 2000

S09N-8590-00

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)

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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 effectively.

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 "YZZZZ" are fitted with Type A panels.

Note: The number range is from 00001 to 99999, and the

LCD Type B:

All ThinkPad 240 computers that have serial numbers whose last five 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.

alphanumeric characters

letter range is from AAAAA to YZZZZ.

letters

are "ZAAAA" to "ZZZZZ" are fitted

are "00001" to

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 computer 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 recurring 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 customer 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

2 ThinkPad 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 excessive 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 password are security features that are used to protect the system and the hard disk drive data from unauthorized access. No overriding capability is provided, so it cannot be replaced if they are forgotten. If the customer 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

4 ThinkPad 240

Feature Description

Audio  16–bit audio

 Internal speaker  Internal microphone

Hard disk drive  3.2/6.4GB, 2.5–inch, IDE

I/O ports  External monitor

Infrared transfer IrDA 1.1 Internal modem 56Kbps (depends on the model) PC Card (PCMCIA) One Type II

AC Adapter 56–Watt type

interface

 Headphone/line-out  Line-in  Microphone-in  Mouse/keyboard  Parallel  Serial  USB  RJ11

 External diskette drive

CardBus support

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,

F8 Switch power mode F9 Hibernation mode F10 Print screen F11 Scroll lock F12 Pause 0 (zero) Activates the system request function

(minus)

= Signals a break

and both the LCD and external monitor.

Enables the numeric keypad

ThinkPad 240 5

Fn + Result

Up arrow

Down arrow

Left arrow

Right arrow

Insert Decreases the internal speaker volume Delete Increases the internal speaker volume Back-

space

Page up

Page down

Home

End

Mutes the internal speaker

Status Indicators

The system status LED indicators show the current computer status. The following shows the location of each indicator symbol and the meaning of each indicator.

ThinkPad

Symbol Color Meaning

(1) Battery status Green Enough battery power

Blinking orange

Orange The battery pack is being

(2) Suspend mode

Green The computer is in

Blinking green

remains for operation. The battery pack needs

to be charged.

charged.

suspend mode. The computer is entering

suspend mode.

6 ThinkPad 240

Symbol Color Meaning

(3) Drive in use Orange Data is being read from

(4) Numeric lock Green The numeric keypad on

(5) Caps lock Green Caps Lock mode is

(6) Scroll lock Green Scroll Lock mode is

(7) Power on Green The computer is opera-

or written to the hard disk drive. Do not enter hibernation mode or power off the computer when this indicator is on.

the keyboard is enabled. You enable or disable the keypad by pressing and holding the Fn key, and pressing the NumLk key. For details, see the User's Reference.

enabled. All alphabetic characters entered in capital letters without the Shift key being pressed. You enable or disable the Caps Lock mode by pressing and holding the

Fn key, and pressing the Caps Lock key.

enabled. The Arrow keys can be used as screen-scroll function keys. The cursor cannot be moved with the Arrow keys.

application programs support this function.

You enable or disable Scroll Lock mode by pressing and holding the

Fn key, and pressing the ScrLk key.

tional. This indicator is always on when the computer is on and not in suspend mode.

(A-Z)

Not all

are

Checkout Guide

Use the following procedure as a guide for computer problems.

Note: The diagnostic tests are intended to test only IBM

products. Non-IBM products, prototype cards, or modified options can give false errors and invalid system responses.

ThinkPad 240

1. Obtain the failing symptoms in as much detail as possible.

2. Verify the symptoms by attempting to recreate the failure by running the diagnostic test or by repeating the same operation.

Note: To run the diagnostics, refer to “Running the

Diagnostics” on page 23

3. Use the following table with the verified symptom to determine which page to go to. Search the symptoms column and find the description that best matches your symptom; then go to the page shown in the "Go to" column.

Symptoms (Verified) Go to

Power failure. (The power-on indicator does not go on or stay on.)

POST does not complete. No beeps or error codes/messages are indicated.

POST beeps, but no error codes are displayed.

POST detected an error and displayed numeric error codes.

The diagnostic test detected an error and displayed a FRU code.

Other symptoms (such as LCD display problems).

Symptoms cannot be recreated (intermittent problems).

“Power System Checkout” on page 10, then use table in “Power-Related Symptoms” on page 20.

“Symptom-to-FRU Index” on page 16, then use table in “No Beep Symptoms” on page 19.

“Symptom-to-FRU Index” on page 16.

“Symptom-to-FRU Index” on page 16, then use table in “Numeric Error Codes” on page 16.

“Running the Diagnostics” on page 23.

“Symptom-to-FRU Index” on page 16.

Use the customer-reported symptoms, and go to “Symptom-to-FRU Index” on page 16.

Audio Checkout

Do as follows:

1. Boot from the diagnostics diskette and start the program.

2. Go to Interactive Tests on the main menu and select the Internal Speaker test.

3. If no sound is heard, replace the speaker.

Fan ASM Checkout

To check the fan ASM, do the following:

1. Boot from the diagnostics diskette and start the program.

8 ThinkPad 240

2. Go to Diagnostics on the main menu and select Other Devices.

3. Follow the description in the window. If the test detects a fan ASM problem, replace the fan.

Keyboard and Auxiliary Input Device Checkout

Note: Remove the external keyboard if the internal key-

board is to be tested.

If the internal keyboard does not work or an unexpected character appears, make sure that the flexible cable extending from the keyboard is correctly seated on the connector.

If the keyboard cable connection is correct, run the Keyboard Test. See “Running the Diagnostics” on page 23 for details.

If the test detects a keyboard problem, do the following one at a time to correct the problem. Do not replace a nondefective FRU.

1. Replace the keyboard.

2. Replace the system board.

The following auxiliary input devices are supported for this computer:

 Numeric keypad

 Mouse (PS/2 compatible)  External keyboard (with keyboard/mouse cable)

If any of these devices do not work, reseat the cable connector and repeat the failing operation.

If the problem does not reoccur, replace the device and then the system board.

Memory Checkout

DIMM are available for increasing memory capacity.

Onboard (MB) Slot (MB) Total Memory

32 0 32 32 32 64 32 64 96 32 128 160 64 0 64 64 32 96 64 64 128 64 128 192

ThinkPad 240 9

(MB)

Memory errors might stop system operation, show error messages on the screen, or hang the system.

Use the following procedure to isolate memory problems:

1. Turn off the computer and remove any installed DIMM from its slot.

2. Boot from the diagnostics diskette and start the program.

3. Go to Diagnostics on the main menu and select Memory Test.If an error appears, replace the system board.

4. Turn off the computer and reinstall the DIMM; then turn on the computer. Verify the memory size; then test the memory. If an error appears, replace the DIMM.

Note: Make sure that the DIMM is properly installed into

the connector. A loose connection can cause an error.

Modem Board Checkout

Do the following to isolate the problem to the system internal modem:

1. Boot from the diagnostics diskette and start the program.

2. Go to Diagnostics on the main menu and select Other Devices.

3. Follow the description in the window.

4. If the test detects a modem problem, replace the modem card.

Power System Checkout

To verify the symptom of the problem power on the computer using each of the following power sources:

1. Remove the battery ASM.

2. Connect the AC Adapter and check that power is supplied.

3. Disconnect the AC Adapter and install the charged battery ASM; then check that power is supplied by the battery ASM.

If you suspect a power problem, refer to the appropriate power supply check listed below:

 “Checking the AC Adapter” on page 11  “Checking the Operational Charging” on page 11  “Checking the Battery ASM” on page 11

10 ThinkPad 240

Checking the AC Adapter: You are here

because the computer fails only when the AC Adapter is used:

 If the power-on indicator does not turn on, check the

power cord of the AC Adapter for correct continuity and installation.

 If the operational charge does not work, go to

“Checking the Operational Charging.”

Unplug the AC Adapter cable from the computer and measure the output voltage at the plug of the AC Adapter cable. See the following figure.

Pin Voltage (V dc)

1 +15.5 to +17.0 2 Ground

If the voltage is not correct, replace the AC Adapter. If the voltage is within the range, do the following:

 Replace the system board.  If the problem is not corrected, go to “Undetermined

Problems” on page 22

Note: An audible noise from the AC Adapter does not

always indicate a defective adapter.

Checking the Operational Charging: To

check operational charging, use a discharged battery pack (battery ASM) or a battery ASM that has less than 50% of the total power remaining when installed in the computer.

Perform operational charging. If the battery status indicator does not turn on, remove the battery ASM and let it return to room temperature. Reinstall the battery ASM.

If the charge indicator still does not turn on, replace the battery ASM. If the charge indicator still does not turn on, replace the system board. Then reinstall the battery ASM. If the reinstalled battery ASM is not charged, go to the next section.

Checking the Battery ASM: Do the following:

1. Power off the computer.

2. Remove the battery ASM and measure the voltage between battery terminals 1(+) and 5(-). See the following figure:

ThinkPad 240 11

Note: Signal lines, not used in these steps, are used

for communications between the system and the battery.

3. If the voltage is less than 10.6V, the battery ASM has been discharged, recharge the battery ASM. If the voltage is still less than 10.6V, replace the battery.

TrackPoint Checkout

If the external mouse is connected, the TrackPoint does not work. In this case, please detach the external mouse to check the TrackPoint.

If this does not correct the TrackPoint problem, continue with the following:

After you use the TrackPoint, the pointer drifts on the screen for a short time. This self-acting pointer movement can occur when a slight, steady pressure is applied to the TrackPoint pointer. This symptom is not a hardware problem. No service actions are necessary if the pointer movement stops in a short period of time.

If a click button problem or pointing stick problem occurs, do the following:

1. Boot from the diagnostics diskette and start the program.

2. Go to Interactive Tests on the main menu and select Mouse.

3. Follow the instructions in the message window.

If either the pointing stick or the click button does not work, do the following actions one at a time to correct the problem. Do not replace a non-defective FRU.

1. Reseat the keyboard Touchbutton cables.

2. Replace the keyboard.

3. Replace the system board.

12 ThinkPad 240

I/O Ports Checkout

Note: Be sure to enable the serial and parallel ports in

the BIOS setup utility before performing diagnostics tests on the I/O ports.

Also, be sure to write down the I/O address for the serial port to identify the port in the diagnostic test.

Do perform a diagnostics checkout on the I/O ports:

1. Boot from the diagnostics diskette and start the program.

2. Go to Diagnostics on the main menu and select

Serial Ports or Parallel Ports. Note: If you want to do a check on the infrared port,

select Serial Ports.

3. In the Serial Port Test Category, you can check four items:

 Registers and Interrupts  Internal Loopback  External Loopback

 FIFO Buffers (16550A) Move the cursor to the item you want to check, and

press Enter. Then follow the instructions on the screen.

Note: To do an External Loopback test, you must

have a Loopback plug.

4. In the Parallel Port Test Category, you can check two items:

 Command And Data Port  External Loopback And IRQ

Move the cursor to the item you want to check, and press Enter. Then follow the instructions on the screen.

Note: To do an External Loopback And IRQ test,

you must have a Loopback plug.

Power Management Features

Three power management modes are available in the computer system to reduce power consumption and to prolong battery life.

Standby Mode: In standby mode, the following

occurs:

 The LCD backlight turns off.  The hard disk drive motor stops.

Events that cause the computer to enter standby mode:

 Standby mode requested by the Fn key (Fn+F3).

ThinkPad 240

The computer exits standby and resumes operation when any key is pressed.

Suspend Mode: In suspend mode, the following

occurs:

 The LCD is powered off.  The hard disk drive is powered off.  The CPU stops.

Events that cause the computer to enter suspend mode:

 Suspend mode requested by the Fn key (Fn+F4).  The Lid is closed.  The specified time has elapsed.  Battery low occurs and hibernation conditions are

insufficient. Note: When battery is low, the battery status indi-

cator blinks orange.

Note: In the IBM BIOS Setup Utility, the computer can be

set to suspend when the lid is closed.

The following events cause the computer to resume operation from suspend mode:

 The Lid is opened.  The real time clock alarm is signaled.  The ring indicator (RI) is signaled by a PC Card

device or the internal modem.

 The Fn key is pressed.  Power switch is pressed.

The computer also exits suspend mode when the battery is critically low or timer conditions are satisfied for entering hibernation mode.

Hibernation Mode: For Windows NT user:

A Windows NT user cannot create a hibernation file in a Windows NT system that uses the NTFS format system. If you want to use hibernation mode, you should reinstall Windows NT with a FAT format system. Also, if boot manager is installed, the computer cannot enter hibernation mode.

Note: Before using hibernation mode, you need a

hibernation file.

In hibernation mode, the following occurs:

 The system status, RAM, VRAM, and setup data are

stored on the hard disk.

 The system is powered off.

Events that cause the computer to enter hibernation mode:

 Hibernation mode requested by function key (Fn+F9).

14 ThinkPad 240

 Timer conditions are satisfied in suspend mode when

hibernate by timer is enabled.

 A critically low battery condition occurs.  The power switch is pressed. (BIOS Setup)

The computer exits hibernation mode and resumes operation when the power-on switch is pressed. When power is turned on, the hibernation file in the boot record on the hard disk drive is read and the system status is restored from the hard disk drive.

The power switch must be pressed to cause the computer to resume operation from hibernation mode.

How to Create the Hibernation Function:

follows:

 Turn off the computer.  Insert the hibernation utility diskette into the diskette

drive (you can create the diskette using the Diskette Factory).

 Turn on the computer.  Follow the instructions on the screen.

Note: If you change the memory size, you need to

recreate the hibernation file or partition. For partition-based hibernation, use the hibernation utility to delete the partition first before creating a new one.

Do as

ThinkPad 240

Symptom-to-FRU Index

The Symptom-to-FRU Index lists the symptoms and errors and the possible causes. The most likely cause is listed first.

Note: Perform the FRU replacement or actions in the

sequence shown in the FRU/Action columns. If a FRU replacement does not solve the problem, put the original part back in the computer. Do not replace a non-defective FRU.

This index can also be used to help you decide the next possible FRUs to be replaced when servicing a computer.

Numeric error codes show the errors detected in POST or system operation (runtime). In the following error codes, X can be any number. If no codes are available, use narrative symptoms.

If the symptom is not listed, go to “Undetermined Problems” on page 22.

Note: For IBM devices not supported by diagnostic codes

in this ThinkPad computer, see the manual for that device.

Numeric Error Codes

The following is a list of the message that the BIOS can display. Most of them occur during POST. Some of them display information about a hardware device, e.g., the amount of memory installed. Others may indicate a problem with a device, such as the way it has been configured. Following the list are explanations of the messages and remedies for reported problems.

If the system fails after you make changes in the Setup menus, reset the computer, enter Setup and install Setup defaults or correct the error.

Symptom/Error FRU/Action in Sequence

0200 Failure Fixed

Disk

0211 Stuck Key

0211 Keyboard

error 0212

Keyboard Controller Failed

1. Reseat hard disk drive.

2. Load Setup Defaults in BIOS Setup Utility.

3. Hard disk drive

4. System board Go to “Keyboard and Auxiliary Input

Device Checkout” on page 9. Go to “Keyboard and Auxiliary Input

Device Checkout” on page 9.

Go to “Keyboard and Auxiliary Input Device Checkout” on page 9.

16 ThinkPad 240

+ 46 hidden pages