Ibm Thinkpad A20M Users Manual A20m/p, A21m/p, A22m/p

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IBM Mobile Systems
ThinkPad Computer
Hardware Maintenance Manual

October 2001

This manual supports:
ThinkPad A20m, A21m, A22m
(MT 2628/2633)
A20p, A21p, A22p
(MT 2629)
ThinkPad Dock
(MT 2631)

Note
Before using this information and the product it
supports, be sure to read the general information
under “Notices” on page 150.

Second Edition (October 2001)
The following paragraph does not apply to the United
Kingdom or any country where such provisions are
inconsistent with local law:
INTERNATIONAL BUSINESS MACHINES CORPORATION
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 disclaimer or express or implied warranties in
certain transactions; therefore, 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
improvements or changes to 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
programs), 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
Corporation 2001. All rights reserved.
US Government Users Restricted Rights – Use, duplication
or disclosure restricted by GSA ADP Schedule Contract
with IBM Corp.

About this manual
This manual contains service and reference information for
IBM ThinkPad A20, A21, A22 (MT2628, 2629, 2633), and
ThinkPad Dock (MT2631) 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 an IBM ThinkPad product, be sure
to review the safety information under “Safety
notices: multilingual translations” on page 3, “Safety
information” on page 14, and “Laser compliance
statement” on page 18.

© Copyright IBM Corp. 2001

iii

iv

ThinkPad A20m/p, A21m/p, A22m/p

Contents
About this manual

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Introduction . . . . . . . . . . . .
Important service information . . . . . . . .
Strategy for replacing FRUs . . . . . . .
How to use error messages . . . . . . .
Diskette compatibility matrix . . . . . . . .
Safety notices: multilingual translations . . . . .
Safety information. . . . . . . . . . .
General safety . . . . . . . . . . .
Electrical safety . . . . . . . . . .
Safety inspection guide . . . . . . . .
Handling electrostatic discharge-sensitive devices
Grounding requirements . . . . . . . .
Laser compliance statement. . . . . . . .

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General descriptions . . . . . . . .
Read this first . . . . . . . . . . .
What to do first . . . . . . . . .
Related service information . . . . . . .
Service web site . . . . . . . . .
Product recovery program . . . . . .
Passwords . . . . . . . . . . .
Power management . . . . . . . .
Checkout guide . . . . . . . . . .
Testing the computer . . . . . . . .
Detecting system information with PC-Doctor.
Power system checkout . . . . . . .

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ThinkPad A20m/p, A21m/p and A22m/p.
Product overview . . . . . . . .
Specifications . . . . . . . .
Status indicators . . . . . . .
FRU tests . . . . . . . . .
Fn key combinations . . . . . .
Symptom-to-FRU index . . . . . .
Numeric error codes . . . . . .
Error messages . . . . . . .
Beep symptoms . . . . . . .
No beep symptoms . . . . . .
LCD-related symptoms . . . . .
Intermittent problems . . . . . .
Undetermined problems . . . . .
FRU replacement notices . . . . .
Screw notices . . . . . . . .
Retaining serial numbers. . . . .
Removing and replacing a FRU. . . .
1010 Battery pack. . . . . . .
1020 DIMM . . . . . . . .
1030 Mini PCI adapter . . . . .

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© Copyright IBM Corp. 2001

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v

1040 Backup battery . . . . . . . .
1050 Hard-disk drive or RF ID adapter . .
1060 Ultrabay 2000 device . . . . . .
1070 Keyboard . . . . . . . . .
1080 Keyboard CRU insulator . . . . .
1090 Hinge cover and clear sheet icon . .
1100 Keyboard bezel and speaker . . . .
1110 Microphone and speaker cable . . .
1120 Sub card . . . . . . . . . .
1130 PC Card slot assembly . . . . .
1140 Fan assembly . . . . . . . .
1150 Diskette drive . . . . . . . .
1160 Upper shield. . . . . . . . .
1170 TV card . . . . . . . . . .
1180 CPU socket and CPU . . . . . .
1190 System board and RJ45/11 connector
assembly . . . . . . . . . .
Thermal rubbers location. . . . . . .
2010 LCD assembly . . . . . . . .
2020 Front bezel . . . . . . . . .
2030 Inverter card . . . . . . . .
2040 LCD panel . . . . . . . . .
3010 ThinkPad Dock PCI cover . . . .
3020 ThinkPad Dock top cover . . . .
Locations . . . . . . . . . . . .
Front view. . . . . . . . . . .
Rear view . . . . . . . . . . .
Bottom view . . . . . . . . . .
Parts list . . . . . . . . . . . .
A series model matrix . . . . . . .
Overall . . . . . . . . . . .
AC adapter . . . . . . . . . .
LCD FRUs . . . . . . . . . .
Keyboard . . . . . . . . . . .
Recovery CDs . . . . . . . . .
Miscellaneous parts . . . . . . . .
Optional FRUs . . . . . . . . .
Common parts list . . . . . . . .
Notices . . . . . . . . . . . .
Trademarks . . . . . . . . . .

vi

ThinkPad A20m/p, A21m/p, A22m/p

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Introduction
Important service information
Important
BIOS and device driver fixes are
customer-installable. The BIOS and device drivers
are posted on the IBM support site
http://www.ibm.com/pc/support
Advise customers to contact the PC Company
HelpCenter at 800-772-2227 if they need assistance
in obtaining or installing any diskette fixes.
Customers in Canada should call IBM HelpPC at
800-565-3344 for assistance or download
information.

Strategy for replacing FRUs
Before replacing parts
Make sure that all diskette fixes are installed before
replacing any FRUs listed in this manual.
Use the following strategy to prevent unnecessary FRU
replacement and service expense:
v If you are instructed to replace a FRU but the
replacement does not correct the problem, reinstall
the original FRU before you continue.
v Some computers have both a processor board and a
system board. If you are instructed to replace either the
processor board or the system board, and replacing one
of them does not correct the problem, reinstall that
board, and then replace the other one.
v If an adapter or device consists of more than one FRU,
any of the FRUs may be the cause of the error. Before
replacing the adapter or device, remove the FRUs, one
by one, to see if the symptoms change. Replace only
the FRU that changed the symptoms.
Attention: The setup configuration on the computer you
are servicing may have been customized. Running
Automatic Configuration may alter the settings. Note the
current configuration settings (using the View Configuration
option); then, when service has been completed, verify that
those settings remain in effect.

© Copyright IBM Corp. 2001

1

Important service information

Strategy for replacing a hard-disk drive
Always try to run a low-level format before replacing a
hard-disk drive.
Attention: The drive startup sequence in the computer
you are servicing may have been changed. Be extremely
careful during write operations such as copying, saving, or
formatting. If you select an incorrect drive, data or
programs can be overwritten.

How to use error messages
Use the error codes displayed on the screen to diagnose
failures. If more than one error code is displayed, begin the
diagnosis with the first error code. Whatever causes the
first error code may also cause false error codes. If no
error code is displayed, see if the error symptom is listed
in the Symptom-to-FRU Index for the computer you are
servicing.

Diskette compatibility matrix
The compatibility of each of the drives with the diskettes
for it is as follows:

2

Diskette
drive

Diskette
capacity

Compatibility

3.5-inch

1.0 MB

Read and write

2.0 MB

Read and write

4.0 MB

Not compatible

ThinkPad A20m/p, A21m/p, A22m/p

Safety notices

Safety notices: multilingual translations
In this manual, safety notices appear in English with a
page number reference to the appropriate multi-lingual,
translated safety notice found in this section.
The following safety notices are provided in English,
French, German, Italian, and Spanish languages.
Safety notice 1
Before the computer is powered-on after FRU
replacement, make sure all screws, springs, and other
small parts are in place and are not left loose inside
the computer. Verify this by shaking the computer and
listening for rattling sounds. Metallic parts or metal
flakes can cause electrical shorts.
Avant de remettre l’ordinateur sous tension après
remplacement d’une unité en clientèle, vérifiez que
tous les ressorts, vis et autres pièces sont bien en
place et bien fixées. Pour ce faire, secouez l’unité et
assurez-vous qu’aucun bruit suspect ne se produit. Des
pièces métalliques ou des copeaux de métal pourraient
causer un court-circuit.
Bevor nach einem FRU-Austausch der Computer
wieder angeschlossen wird, muß sichergestellt werden,
daß keine Schrauben, Federn oder andere Kleinteile
fehlen oder im Gehäuse vergessen wurden. Der
Computer muß geschüttelt und auf Klappergeräusche
geprüft werden. Metallteile oder-splitter können
Kurzschlüsse erzeugen.
Prima di accendere l’elaboratore dopo che é stata
effettuata la sostituzione di una FRU, accertarsi che
tutte le viti, le molle e tutte le altri parti di piccole
dimensioni siano nella corretta posizione e non siano
sparse all’interno dell’elaboratore. Verificare ciò
scuotendo l’elaboratore e prestando attenzione ad
eventuali rumori; eventuali parti o pezzetti metallici
possono provocare cortocircuiti pericolosi.
Antes de encender el sistema despues de sustituir una
FRU, compruebe que todos los tornillos, muelles y
demás piezas pequeñas se encuentran en su sitio y no
se encuentran sueltas dentro del sistema.
Compruébelo agitando el sistema y escuchando los
posibles ruidos que provocarían. Las piezas metálicas
pueden causar cortocircuitos eléctricos.

Introduction

3

Safety notices

Safety notice 2

DANGER
Some standby batteries contain a small amount of
nickel and cadmium. Do not disassemble a standby
battery, recharge it, throw it into fire or water, or
short-circuit it. Dispose of the battery as required
by local ordinances or regulations. Use only the
battery in the appropriate parts listing. Use of an
incorrect battery can result in ignition or explosion
of the battery.
Certaines batteries de secours contiennent du
nickel et du cadmium. Ne les démontez pas, ne les
rechargez pas, ne les exposez ni au feu ni à l’eau.
Ne les mettez pas en court-circuit. Pour les mettre
au rebut, conformez-vous à la réglementation en
vigueur. Lorsque vous remplacez la pile de
sauvegarde ou celle de l’horloge temps réel, veillez
à n’utiliser que les modèles cités dans la liste de
pièces détachées adéquate. Une batterie ou une
pile inappropriée risque de prendre feu ou
d’exploser.
Die Bereitschaftsbatterie, die sich unter dem
Diskettenlaufwerk befindet, kann geringe Mengen
Nickel und Cadmium enthalten. Sie darf nur durch
die Verkaufsstelle oder den IBM Kundendienst
ausgetauscht werden. Sie darf nicht zerlegt,
wiederaufgeladen, kurzgeschlossen, oder Feuer
oder Wasser ausgesetzt werden. Die Batterie kann
schwere Verbrennungen oder Verätzungen
verursachen. Bei der Entsorgung die örtlichen
Bestimmungen für Sondermüll beachten. Beim
Ersetzen der Bereitschafts-oder Systembatterie nur
Batterien des Typs verwenden, der in der
Ersatzteilliste aufgeführt ist. Der Einsatz falscher
Batterien kann zu Entzündung oder Explosion
führen.

(continued)

4

ThinkPad A20m/p, A21m/p, A22m/p

Safety notices

(continuation of safety notice 2)
Alcune batterie di riserva contengono una piccola
quantità di nichel e cadmio. Non smontarle,
ricaricarle, gettarle nel fuoco o nell’acqua né
cortocircuitarle. Smaltirle secondo la normativa in
vigore (DPR 915/82, successive disposizioni e
disposizioni locali). Quando si sostituisce la
batteria dell’RTC (real time clock) o la batteria di
supporto, utilizzare soltanto i tipi inseriti
nell’appropriato Catalogo parti. L’impiego di una
batteria non adatta potrebbe determinare l’incendio
o l’esplosione della batteria stessa.
Algunas baterías de reserva contienen una
pequeña cantidad de níquel y cadmio. No las
desmonte, ni recargue, ni las eche al fuego o al
agua ni las cortocircuite. Deséchelas tal como
dispone la normativa local. Utilice sólo baterías que
se encuentren en la lista de piezas. La utilización
de una batería no apropiada puede provocar la
ignición o explosión de la misma.

Introduction

5

Safety notices

Safety notice 3

DANGER
The battery pack contains small amounts of nickel.
Do not disassemble it, throw it into fire or water, or
short-circuit it. Dispose of the battery pack as
required by local ordinances or regulations. Use
only the battery in the appropriate parts listing
when replacing the battery pack. Use of an
incorrect battery can result in ignition or explosion
of the battery.
La batterie contient du nickel. Ne la démontez pas,
ne l’exposez ni au feu ni à l’eau. Ne la mettez pas
en court- circuit. Pour la mettre au rebut,
conformez-vous à la réglementation en vigueur.
Lorsque vous remplacez la batterie, veillez à
n’utiliser que les modèles cités dans la liste de
pièces détachées adéquate. En effet, une batterie
inappropriée risque de prendre feu ou d’exploser.
Akkus enthalten geringe Mengen von Nickel. Sie
dürfen nicht zerlegt, wiederaufgeladen,
kurzgeschlossen, oder Feuer oder Wasser
ausgesetzt werden. Bei der Entsorgung die
örtlichen Bestimmungen für Sondermüll beachten.
Beim Ersetzen der Batterie nur Batterien des Typs
verwenden, der in der Ersatzteilliste aufgeführt ist.
Der Einsatz falscher Batterien kann zu Entzündung
oder Explosion führen.
La batteria contiene piccole quantità di nichel. Non
smontarla, gettarla nel fuoco o nell’acqua né
cortocircuitarla. Smaltirla secondo la normativa in
vigore (DPR 915/82, successive disposizioni e
disposizioni locali). Quando si sostituisce la
batteria, utilizzare soltanto i tipi inseriti
nell’appropriato Catalogo parti. L’impiego di una
batteria non adatta potrebbe determinare l’incendio
o l’esplosione della batteria stessa.

(continued)

6

ThinkPad A20m/p, A21m/p, A22m/p

Safety notices

(continuation of safety notice 3)
Las baterías contienen pequeñas cantidades de
níquel. No las desmonte, ni recargue, ni las eche al
fuego o al agua ni las cortocircuite. Deséchelas tal
como dispone la normativa local. Utilice sólo
baterías que se encuentren en la lista de piezas al
sustituir la batería. La utilización de una batería no
apropiada puede provocar la ignición o explosión
de la misma.

Introduction

7

Safety notices

Safety notice 4

DANGER
The lithium battery can cause a fire, an explosion,
or a severe burn. Do not recharge it, remove its
polarized connector, disassemble it, heat it above
100°C (212°F), incinerate it, or expose its cell
contents to water. Dispose of the battery as
required by local ordinances or regulations. Use
only the battery in the appropriate parts listing. Use
of an incorrect battery can result in ignition or
explosion of the battery.
La pile de sauvegarde contient du lithium. Elle
présente des risques d’incendie, d’explosion ou de
brûlures graves. Ne la rechargez pas, ne retirez pas
son connecteur polarisé et ne la démontez pas. Ne
l’exposez pas à une temperature supérieure à
100°C, ne la faites pas brûler et n’en exposez pas
le contenu à l’eau. Mettez la pile au rebut
conformément à la réglementation en vigueur. Une
pile inappropriée risque de prendre feu ou
d’exploser.
Die Systembatterie ist eine Lithiumbatterie. Sie
kann sich entzünden, explodieren oder schwere
Verbrennungen hervorrufen. Batterien dieses Typs
dürfen nicht aufgeladen, zerlegt, über 100 C erhitzt
oder verbrannt werden. Auch darf ihr Inhalt nicht
mit Wasser in Verbindung gebracht oder der zur
richtigen Polung angebrachte Verbindungsstecker
entfernt werden. Bei der Entsorgung die örtlichen
Bestimmungen für Sondermüll beachten. Beim
Ersetzen der Batterie nur Batterien des Typs
verwenden, der in der Ersatzteilliste aufgeführt ist.
Der Einsatz falscher Batterien kann zu Entzündung
oder Explosion führen.

(continued)

8

ThinkPad A20m/p, A21m/p, A22m/p

Safety notices

(continuation of safety notice 4)
La batteria di supporto e una batteria al litio e puo
incendiarsi, esplodere o procurare gravi ustioni.
Evitare di ricaricarla, smontarne il connettore
polarizzato, smontarla, riscaldarla ad una
temperatura superiore ai 100 gradi centigradi,
incendiarla o gettarla in acqua. Smaltirla secondo
la normativa in vigore (DPR 915/82, successive
disposizioni e disposizioni locali). L’impiego di una
batteria non adatta potrebbe determinare l’incendio
o l’esplosione della batteria stessa.
La batería de repuesto es una batería de litio y
puede provocar incendios, explosiones o
quemaduras graves. No la recargue, ni quite el
conector polarizado, ni la desmonte, ni caliente por
encima de los 100°C (212°F), ni la incinere ni
exponga el contenido de sus celdas al agua.
Deséchela tal como dispone la normativa local.

Introduction

9

Safety notices

Safety notice 5
If the LCD breaks and the fluid from inside the LCD
gets into your eyes or on your hands, immediately
wash the affected areas with water for at least 15
minutes. Seek medical care if any symptoms from the
fluid are present after washing.
Si le panneau d’affichage à cristaux liquides se brise et
que vous recevez dans les yeux ou sur les mains une
partie du fluide, rincez-les abondamment pendant au
moins quinze minutes. Consultez un médecin si des
symptômes persistent après le lavage.
Die Leuchtstoffröhre im LCD-Bildschirm enthält
Quecksilber. Bei der Entsorgung die örtlichen
Bestimmungen für Sondermüll beachten. Der
LCD-Bildschirm besteht aus Glas und kann zerbrechen,
wenn er unsachgemäß behandelt wird oder der
Computer auf den Boden fällt. Wenn der Bildschirm
beschädigt ist und die darin befindliche Flüssigkeit in
Kontakt mit Haut und Augen gerät, sollten die
betroffenen Stellen mindestens 15 Minuten mit Wasser
abgespült und bei Beschwerden anschließend ein Arzt
aufgesucht werden.
Nel caso che caso l’LCD si dovesse rompere ed il
liquido in esso contenuto entrasse in contatto con gli
occhi o le mani, lavare immediatamente le parti
interessate con acqua corrente per almeno 15 minuti;
poi consultare un medico se i sintomi dovessero
permanere.
Si la LCD se rompe y el fluido de su interior entra en
contacto con sus ojos o sus manos, lave
inmediatamente las áreas afectadas con agua durante
15 minutos como mínimo. Obtenga atención medica si
se presenta algún síntoma del fluido despues de
lavarse.

10

ThinkPad A20m/p, A21m/p, A22m/p

Safety notices

Safety notice 6

DANGER
To avoid shock, do not remove the plastic cover
that protects the lower part of the inverter card.
Afin d’éviter tout risque de choc électrique, ne
retirez pas le cache en plastique protégeant la
partie inférieure de la carte d’alimentation.
Aus Sicherheitsgründen die Kunststoffabdeckung,
die den unteren Teil der Spannungswandlerplatine
umgibt, nicht entfernen.
Per evitare scosse elettriche, non rimuovere la
copertura in plastica che avvolge la parte inferiore
della scheda invertitore.
Para evitar descargas, no quite la cubierta de
plástico que rodea la parte baja de la tarjeta
invertida.

Introduction

11

Safety notices

Safety notice 7

DANGER
Though the main batteries have low voltage, a
shorted or grounded battery can produce enough
current to burn personnel or combustible materials.
Bien que le voltage des batteries principales soit
peu élevé, le court-circuit ou la mise à la masse
d’une batterie peut produire suffisamment de
courant pour brûler des matériaux combustibles ou
causer des brûlures corporelles graves.
Obwohl Hauptbatterien eine niedrige Spannung
haben, können sie doch bei Kurzschluß oder
Erdung genug Strom abgeben, um brennbare
Materialien zu entzünden oder Verletzungen bei
Personen hervorzurufen.
Sebbene le batterie di alimentazione siano a basso
voltaggio, una batteria in corto circuito o a massa
può fornire corrente sufficiente da bruciare
materiali combustibili o provocare ustioni ai tecnici
di manutenzione.
Aunque las baterías principales tienen un voltaje
bajo, una batería cortocircuitada o con contacto a
tierra puede producir la corriente suficiente como
para quemar material combustible o provocar
quemaduras en el personal.

12

ThinkPad A20m/p, A21m/p, A22m/p

Safety notices

Safety notice 8

DANGER
Before removing any FRU, power off the computer,
unplug all power cords from electrical outlets,
remove the battery pack, and then disconnect any
interconnecting cables.
Avant de retirer une unité remplaçable en clientèle,
mettez le système hors tension, débranchez tous
les cordons d’alimentation des socles de prise de
courant, retirez la batterie et déconnectez tous les
cordons d’interface.
Die Stromzufuhr muß abgeschaltet, alle Stromkabel
aus der Steckdose gezogen, der Akku entfernt und
alle Verbindungskabel abgenommen sein, bevor
eine FRU entfernt wird.
Prima di rimuovere qualsiasi FRU, spegnere il
sistema, scollegare dalle prese elettriche tutti i cavi
di alimentazione, rimuovere la batteria e poi
scollegare i cavi di interconnessione.
Antes de quitar una FRU, apague el sistema,
desenchufe todos los cables de las tomas de
corriente eléctrica, quite la batería y, a
continuación, desconecte cualquier cable de
conexión entre dispositivos.

Introduction

13

Safety information

Safety information
The following section contains the safety information that
you need to be familiar with before servicing an IBM
mobile computer.

General safety
Follow these rules to ensure general safety:
v Observe good housekeeping in the area of the
machines during and after maintenance.
v When lifting any heavy object:
1. Ensure you can stand safely without slipping.
2. Distribute the weight of the object equally between
your feet.
3. Use a slow lifting force. Never move suddenly or
twist when you attempt to lift.
4. Lift by standing or by pushing up with your leg
muscles; this action removes the strain from the
muscles in your back. Do not attempt to lift any
objects that weigh more than 16 kg (35 lb) or objects
that you think are too heavy for you.
v Do not perform any action that causes hazards to the
customer, or that makes the equipment unsafe.
v Before you start the machine, ensure that other service
representatives and the customer’s personnel are not in
a hazardous position.
v Place removed covers and other parts in a safe place,
away from all personnel, while you are servicing the
machine.
v Keep your toolcase away from walk areas so that other
people will not trip over it.
v Do not wear loose clothing that can be trapped in the
moving parts of a machine. Make sure that your sleeves
are fastened or rolled up above your elbows. If your hair
is long, fasten it.
v Insert the ends of your necktie or scarf inside clothing or
fasten it with a nonconductive clip, approximately 8
centimeters (3 inches) from the end.
v Do not wear jewelry, chains, metal-frame eyeglasses, or
metal fasteners for your clothing.
Attention: Metal objects are good electrical
conductors.
v Wear safety glasses when you are hammering, drilling,
soldering, cutting wire, attaching springs, using solvents,
or working in any other conditions that might be
hazardous to your eyes.
v After service, reinstall all safety shields, guards, labels,
and ground wires. Replace any safety device that is
worn or defective.
v Reinstall all covers correctly before returning the
machine to the customer.

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Safety information

Electrical safety
Observe the following rules when working on electrical
equipment.

Important
Use only approved tools and test equipment. Some
hand tools have handles covered with a soft
material that does not insulate you when working
with live electrical currents.
Many customers have, near their equipment, rubber
floor mats that contain small conductive fibers to
decrease electrostatic discharges. Do not use this
type of mat to protect yourself from electrical shock.
v Find the room emergency power-off (EPO) switch,
disconnecting switch, or electrical outlet. If an electrical
accident occurs, you can then operate the switch or
unplug the power cord quickly.
v Do not work alone under hazardous conditions or near
equipment that has hazardous voltages.
v Disconnect all power before:
– Performing a mechanical inspection
– Working near power supplies
– Removing or installing main units
v Before you start to work on the machine, unplug the
power cord. If you cannot unplug it, ask the customer to
power-off the wall box that supplies power to the
machine and to lock the wall box in the off position.
v If you need to work on a machine that has exposed
electrical circuits, observe the following precautions:
– Ensure that another person, familiar with the
power-off controls, is near you.
Attention: Another person must be there to switch
off the power, if necessary.
– Use only one hand when working with powered-on
electrical equipment; keep the other hand in your
pocket or behind your back.
Attention: An electrical shock can occur only when
there is a complete circuit. By observing the above
rule, you may prevent a current from passing through
your body.
– When using testers, set the controls correctly and
use the approved probe leads and accessories for
that tester.
– Stand on suitable rubber mats (obtained locally, if
necessary) to insulate you from grounds such as
metal floor strips and machine frames.

Introduction

15

Safety information

v
v
v
v

v

v

Observe the special safety precautions when you work
with very high voltages; these instructions are in the
safety sections of maintenance information. Use
extreme care when measuring high voltages.
Regularly inspect and maintain your electrical hand tools
for safe operational condition.
Do not use worn or broken tools and testers.
Never assume that power has been disconnected from
a circuit. First, check that it has been powered off.
Always look carefully for possible hazards in your work
area. Examples of these hazards are moist floors,
nongrounded power extension cables, power surges,
and missing safety grounds.
Do not touch live electrical circuits with the reflective
surface of a plastic dental mirror. The surface is
conductive; such touching can cause personal injury and
machine damage.
Do not service the following parts with the power on
when they are removed from their normal operating
places in a machine:
– Power supply units
– Pumps
– Blowers and fans
– Motor generators

and similar units. (This practice ensures correct
grounding of the units.)
v If an electrical accident occurs:
– Use caution; do not become a victim yourself.
– Switch off power.
– Send another person to get medical aid.

Safety inspection guide
The purpose of this inspection guide is to assist you in
identifying potentially unsafe conditions. As each machine
was designed and built, required safety items were
installed to protect users and service personnel from injury.
This guide addresses only those items. You should use
good judgment to identify potential safety hazards due to
attachment of non-IBM features or options not covered by
this inspection guide.
If any unsafe conditions are present, you must determine
how serious the apparent hazard could be and whether
you can continue without first correcting the problem.
Consider these conditions and the safety hazards they
present:
v Electrical hazards, especially primary power (primary
voltage on the frame can cause serious or fatal
electrical shock)
v Explosive hazards, such as a damaged CRT face or a
bulging capacitor

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Safety information

v Mechanical hazards, such as loose or missing hardware
To determine whether there are any potentially unsafe
conditions, use the following checklist at the beginning of
every service task. Begin the checks with the power off,
and the power cord disconnected.
Checklist:
1. Check exterior covers for damage (loose, broken, or
sharp edges.)
2. Power-off the computer. Disconnect the power cord.
3. Check the power cord for:
a. A third-wire ground connector in good condition.
Use a meter to measure third-wire ground
continuity for 0.1 ohm or less between the external
ground pin and frame ground.
b. The power cord should be the type specified in the
parts list.
c. Insulation must not be frayed or worn.
4. Remove the cover.
5. Check for any obvious non-IBM alterations. Use good
judgment as to the safety of any non-IBM alterations.
6. Check inside the unit for any obvious unsafe
conditions, such as metal filings, contamination, water
or other liquids, or signs of fire or smoke damage.
7. Check for worn, frayed, or pinched cables.
8. Check that the power-supply cover fasteners (screws
or rivets) have not been removed or tampered with.

Handling electrostatic
discharge-sensitive devices
Any computer part containing transistors or integrated
circuits (ICs) should be considered sensitive to electrostatic
discharge (ESD.) ESD damage can occur when there is a
difference in charge between objects. Protect against ESD
damage by equalizing the charge so that the machine, the
part, the work mat, and the person handling the part are all
at the same charge.

Notes
1. Use product-specific ESD procedures when they
exceed the requirements noted here.
2. Make sure that the ESD protective devices you
use have been certified (ISO 9000) as fully
effective.
When handling ESD-sensitive parts:
v Keep the parts in protective packages until they are
inserted into the product.
v Avoid contact with other people.
Introduction

17

Safety information

v Wear a grounded wrist strap against your skin to
eliminate static on your body.
v Prevent the part from touching your clothing. Most
clothing is insulative and retains a charge even when
you are wearing a wrist strap.
v Use the black side of a grounded work mat to provide a
static-free work surface. The mat is especially useful
when handling ESD-sensitive devices.
v Select a grounding system, such as those listed below,
to provide protection that meets the specific service
requirement.

Note
The use of a grounding system is desirable but
not required to protect against ESD damage.
– Attach the ESD ground clip to any frame ground,
ground braid, or green-wire ground.
– Use an ESD common ground or reference point
when working on a double-insulated or
battery-operated system. You can use coax or
connector-outside shells on these systems.
– Use the round ground-prong of the AC plug on
AC-operated computers.

Grounding requirements
Electrical grounding of the computer is required for
operator safety and correct system function. Proper
grounding of the electrical outlet can be verified by a
certified electrician.

Laser compliance statement
Some IBM Personal Computer models are equipped from
the factory with an optical storage device; such as a
CD-ROM drive or DVD-ROM drive. They are also sold
separately as options. The drive is certified in the U.S. to
conform to the requirements of the Department of Health
and Human Services 21 Code of Federal Regulations
(DHHS 21 CFR) Subchapter J for Class 1 laser products.
Elsewhere, the drive is certified to conform to the
requirements of the International Electrotechnical
Commission (IEC) 825 and CENELEC EN 60 825 for
Class 1 laser products.

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Laser compliance statement

When a CD-ROM drive, DVD drive or the other laser
product is installed, note the following:

CAUTION:
Use of controls or adjustments or performance of
procedures other than those specified herein might
result in hazardous radiation exposure.
O uso de controles, ajustes ou desempenho de
procedimentos diferentes daqueles aqui especificados
pode resultar em perigosa exposição à radiação.

Pour éviter tout risque d’exposition au rayon laser,
respectez les consignes de réglage et d’utilisation des
commandes, ainsi que les procédures décrites.
Werden Steuer- und Einstellelemente anders als hier
festgesetzt verwendet, kann gefährliche Laserstrahlung
auftreten.

L’utilizzo di controlli, regolazioni o l’esecuzione di
procedure diverse da quelle specificate possono
provocare l’esposizione a.

El uso de controles o ajustes o la ejecución de
procedimientos distintos de los aquí especificados
puede provocar la exposición a radiaciones peligrosas.

Introduction

19

Laser compliance statement

Opening the CD-ROM drive, DVD-ROM drive or the other
optical storage device could result in exposure to
hazardous laser radiation. There are no serviceable parts
inside those drives. Do not open.
Some CD-ROM drives, DVD-ROM drives or the other
optical storage devices contain an embedded Class 3A or
Class 3B laser diode. Note the following:

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Laser compliance statement

DANGER
Emits visible and invisible laser radiation when
open. Do not stare into the beam, do not view
directly with optical instruments, and avoid direct
exposure to the beam.
Radiação por raio laser ao abrir. Não olhe fixo no
feixe de luz, não olhe diretamente por meio de
instrumentos óticos e evite exposição direta com o
feixe de luz.

Rayonnement laser si carter ouvert. Évitez de fixer
le faisceau, de le regarder directement avec des
instruments optiques, ou de vous exposer au
rayon.
Laserstrahlung bei geöffnetem Gerät. Nicht direkt
oder über optische Instrumente in den Laserstrahl
sehen und den Strahlungsbereich meiden.
Kinyitáskor lézersugár ! Ne nézzen bele se szabad
szemmel, se optikai eszközökkel. Kerülje a
sugárnyalábbal való érintkezést !
Aprendo l’unità vengono emesse radiazioni laser.
Non fissare il fascio, non guardarlo direttamente
con strumenti ottici e evitare l’esposizione diretta al
fascio.

Radiación láser al abrir. No mire fijamente ni
examine con instrumental óptico el haz de luz.
Evite la exposición directa al haz.

Introduction

21

Laser compliance statement

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ThinkPad A20m/p, A21m/p, A22m/p

General descriptions
This chapter includes descriptions for any ThinkPad model
that has the PC-Doctor DOS diagnostics program. Some
descriptions might not apply to your particular computer.

Read this first
Before you go to the checkout guide, be sure to read this
section.

Important notes
v Only certified trained personnel should
service the computer.
v Read the entire FRU removal and replacement
page before replacing any FRU.
v Use new nylon-coated screws when you
replace FRUs.
v Be extremely careful during such write
operations as copying, saving, or formatting.
Drives in the computer that you are servicing
sequence might have been altered. If you select
an incorrect drive, data or programs might be
overwritten.
v Replace FRUs only for the correct model.
When you replace a FRU, make sure the model
of the machine and the FRU part number are
correct by referring to the FRU parts list.
v 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. Consider replacing a FRU only
when a problem recurs. If you suspect that a
FRU is defective, clear the error log and run the
test again. If the error does not recur, do not
replace the FRU.
v Be careful not to replace a nondefective FRU.

What to do first
When you do return a FRU, you must include the following
information in the parts exchange form or parts return form
that you attach to it:
__ 1. Name and phone number of servicer
__ 2. Date of service
__ 3. Date on which the machine failed
__ 4. Date of purchase
__ 5. Failure symptoms, error codes appearing on the
display, and beep symptoms
© Copyright IBM Corp. 2001

23

Read this first

__ 6. Procedure index and page number in which the
failing FRU was detected
__ 7. Failing FRU name and part number
__ 8. Machine type, model number, and serial number
__ 9. Customer’s name and address
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
and some symptoms that might indicate that the system
was subjected to stress beyond normal use.
Before checking problems with the computer, determine
whether the damage is covered under the warranty by
referring to the following:
The following are not covered under warranty:
v LCD panel cracked from the application of excessive
force or from being dropped
v Scratched (cosmetic) parts
v Distortion, deformation or discoloration of the cosmetic
parts
v Cracked or broken plastic parts, broken latches, broken
pins, or broken connectors caused by excessive force
v Damage caused by liquid spilled into the system
v Damage caused by the improper insertion of a PC Card
or the installation of an incompatible card
v Damage caused by foreign material in the diskette drive
v Diskette drive damage caused by pressure on the
diskette drive cover or by the insertion of a diskette with
multiple labels
v Damaged or bent diskette eject button
v Fuses blown by attachment of a nonsupported device
v Forgotten computer password (making the computer
unusable)
v Sticky keys caused by spilling a liquid onto the keyboard
The following symptoms might indicate damage
caused by nonwarranted activities:
v Missing parts might be a symptom of unauthorized
service or modification.
v If the spindle of a hard-disk drive becomes noisy, it may
have been subjected to excessive force, or dropped.

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Related service information

Related service information
This section provides information about the following:
v “Service web site”
v “Product recovery program”
v “Passwords” on page 27
v “Power management” on page 30

Service web site
When the latest maintenance diskette and the system
program service diskette become available, a notice will be
posted on http://www.ibm.com/pc/partner/infotips

Product recovery program
Restoring the pre-installed software:
If the data on a hard-disk drive is damaged or accidentally
erased, you can restore the software that was shipped with
the computer. This software includes the pre-installed
operating system, applications, and device drivers.
To restore the pre-installed software, you can use either
the Product Recovery program or a Recovery CD.
The Product Recovery program is in the Service Partition,
a section of the hard-disk drive that is not displayed by
Windows Explorer. Use the Recovery CD if it was provided
with the computer.
Note: The recovery process might take up to 2 hours.
To use the Product Recovery program to restore the
pre-installed software, do the following:
1. Save all files and shut down the desktop.
2. Turn off the computer.
3. Turn on the computer. A message appears on the
screen: “To start the Product Recovery program,
press F11”; or, for Windows XP models, “Press F11 to
invoke the IBM Product Recovery program”. Press
F11 quickly; this message is displayed for only a few
seconds.
Note: If this message does not appear, you can use a
Recovery Repair diskette to get access to the
Product Recovery program. (Directions for
making a Recovery Repair diskette are given in
“To create a recovery repair diskette” on
page 26.)
4. From the list displayed on the screen, select the
operating system you want to recover.
5. Select the recovery options you want, and follow the
instructions on the screen.

General descriptions

25

Related service information

Creating the service partition:
To create the Service Partition and install the preloaded
system from the Recovery CD, do the following:
To create the Service Partition (SP):
1. Erase all partitions on the hard-disk drive, using FDISK
or a similar application.
2. Boot with the Recovery CD (and the boot diskette if
required.)
3. Following message appears: “Your computer
originally included a Product Recovery program ...
Reinstall the Product Recovery Program? (Y/N) [ ]”.
Note: If the hard-disk drive contains any partitions, you
do not receive this message ; go to step 1.
4. Enter Y. The Service Partition is created and loaded
with the Product Recovery program files.
Note: If you do not want to create the Service
Partition, press N key, and then go to step 8.
5. At next window, press Enter to continue.
v The Service Partition is created. The system
automatically reboots during this process.
v The recovery process copies some files to the
Service Partition and, PKUNZIPs others.
v Follow the prompts. You may be prompted to
change CDs.
v When the process is complete, the system reboots.
Continue to step 6 to install preloaded system.
Install preloaded system from CD:
6. Boot with the Recovery CD (and the boot diskette if
required.)
7. If the hard-disk drive is blank, the following message
appears: “Your computer originally included a
Product Recovery program ... Reinstall the
Product Recovery Program? (Y/N) [ ]”.
v To install the Service Partition, go to step 4.
v To preload the hard-disk drive without installing the
Service Partition, press the N key.
8. If you get a message asking which operating system
to install, highlight the proper operating system and
press Enter.
9. A message appears: “Full Recovery:”. Press Enter to
select.
10. Enter the Y at each of the next three windows.
11. Follow the prompts to complete Recovery.

To create a recovery repair diskette
If the prompt needed for access to the Product Recovery
program does not appear, you can recover it by use of the

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Related service information

Recovery Repair diskette. Make a Recovery Repair
diskette and save it for future use. To make a Recovery
Repair diskette:
1. Shut down and turn off the computer.
2. Attach the external diskette drive to the computer.
3. At the prompt, press F11. (The option to press F11
appears for only a few seconds. You must press F11
quickly.) The Product Recovery program main menu
appears.
4. If you are using Windows 2000 Professional, you are
prompted to select an operating system. This menu
does not appear for Windows 98 SE.
5. From the main menu, select System Utilities. Press
Enter.
6. Select Create a Recovery Repair diskette. Press Enter.
7. Follow the on-screen instructions.
8. When the process is completed, label the diskette as
the Recovery Repair diskette and save it for future use.

To use the recovery repair diskette:
1. Shut down and turn off the computer.
2. Attach the external diskette drive to the computer.
3. Insert the Recovery Repair diskette into the drive; then
turn on the computer.
4. Follow the on-screen instructions.

Note
Should the hard-disk drive need to be replaced, you
must order a Recovery CD with the hard-disk drive
so that you can recover the new hard-disk drive with
the pre-installed software when it arrives. For
information on which CD to order, see “Recovery
CDs” on page 141.

Passwords
As many as three passwords may be needed for any
ThinkPad computer: the power-on password (POP), the
hard-disk password (HDP), and the supervisor password
(SVP).
If any of these passwords have been set, a prompt for it
appears on the screen whenever the computer is turned
on. The computer does not start until the password is
entered.
Exception: If only an SVP is installed, the password
prompt doesn’t appear when the operating
system is booted.

General descriptions

27

Related service information

Power-on password:
A power-on password (POP) protects the system from
being powered on by an unauthorized person. The
password must be entered before an operating system can
be booted.

Hard-disk password:
There are two hard-disk passwords (HDPs):
v User HDP—for the user
v Master HDP—for the system administrator, who can use
it to get access to the hard disk even if the user has
changed the user HDP
Note: There are two modes for the HDP: User only and
Master + User. The Master + User mode requires
two HDPs; the system administrator enters both in
the same operation. The system administrator then
provides the user HDP to the system user.

Attention
If the user HDP has been forgotten, check whether
a master HDP has been set. It it has, it can be used
for access to the hard-disk drive. If no master HDP
is available, IBM does not provide any services to
reset either the user or the master HDP, or to
recover data from the hard-disk drive. The hard-disk
drive can be replaced for a scheduled fee.

Supervisor password:
A supervisor password (SVP) protects the system
information stored in the IBM BIOS Setup Utility. The SVP
must be entered in order to get access to the IBM BIOS
Setup Utility and make changes to system configuration
settings.

Attention
If the SVP has been forgotten and cannot be made
available to the servicer, there is no service
procedure to reset the password. The systemboard
must be replaced for a scheduled fee.

How to remove the power-on password
To remove a POP that you have forgotten, do the
following:
(A) If no SVP has been set:
1. Turn off the computer.
2. Remove the battery pack.

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For how to remove the battery pack, see “1010 Battery
pack” on page 60.
3. Remove the backup battery.
For how to remove the backup battery, see “1040
Backup battery” on page 66.
4. Turn on the computer and wait until the POST ends.
After the POST ends, the password prompt does not
appear. The POP has been removed.
5. Reinstall the backup battery and the battery pack.
(B) If an SVP has been set and is known by the servicer:
1. Turn on the computer by pressing and holding F1.
2. Enter the SVP. The IBM BIOS Setup Utility menu
appears.
3. Select Password, using the cursor keys to move down
the menu.
4. Select Power-On Password.
5. At the Enter Current Password field, enter the SVP.
6. When the Enter New Password field opens, leave it
blank and press Enter twice.
7. In the Changes have been saved window, press Enter.
8. Press F10; then, in the Setup confirmation window,
select Yes .

How to remove the hard-disk password
Attention
If User only mode is selected and the user HDP
has been forgotten and cannot be made available to
the servicer, IBM does not provide any services to
reset the user HDPs or to recover data from the
hard-disk drive. The hard-disk drive can be replaced
for a scheduled fee.
To remove a user HDP that has been forgotten, when the
SVP and the master HDP are known, do the following:
1. Power on the computer by pressing and holding F1.
2. Enter the SVP. The IBM BIOS Setup Utility menu
appears.
3. Select Password, using the cursor keys to move down
the menu.
4. Select Hard-disk x password, where x is the letter of
the hard-disk drive. A pop-up window opens.
5. Select Master HDP.
6. Enter the master HDP; then leave the New Password
field blank and press Enter twice.
7. Press F10.
8. Select Yes in the Setup Configuration window.
Both user HDP and master HDP will have been
removed.

General descriptions

29

Related service information

Power management
To reduce power consumption, the computer has three
power management modes: screen blank, standby, and
hibernation.

Notes
v Screen blank mode is called standby mode in
Windows 95 and Windows NT.
v Standby mode is called suspend mode in
Windows 95 and Windows NT.

Screen blank mode
Screen blank mode has three variants, as follows:
1. If you press Fn + F3, or the time set on the “LCD off
timer” in IBM BIOS Setup Utility expires,
v The LCD backlight turns off.
v The hard-disk drive motor stops.
v The speaker is muted.
2. If you are using the ACPI operating system and you
press Fn + F3,
v The LCD backlight turns off.
v The hard-disk drive motor stops.
3. If the time set on the “Turn off monitor” timer in the
operating system expires,
v The LCD backlight turns off.
To end screen blank mode and resume normal operation,
press any key.

Standby mode
When the computer enters standby mode, the following
events occur in addition to what occurs in screen blank
mode:
v The LCD is powered off.
v The hard-disk drive is powered off.
v The CPU stops.
To enter standby mode, press Fn + F4.
Note: You can change the action of Fn + F4, if you are
using the ACPI operating system.
In certain circumstances, the computer goes into standby
mode automatically:
v If a “suspend time” has been set on the timer, and the
user does not do any operation with the keyboard, the
TrackPoint, the hard disk, the parallel connector, or the
diskette drive within that time.

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v If the battery indicator blinks orange, indicating that the
battery power is low. (Alternatively, if Hibernate when
battery becomes low has been selected in the “Power
Management Properties” window, the computer goes
into hibernation mode.)
Note for the APM operating system:
Even if you do not set the low-battery alarm, the charge
indicator notifies you when the battery is low, and then the
computer enters the power-saving mode automatically.
This default low-battery behavior is independent of the
operating system; so if you have set the low-battery alarm,
the computer may not do what you specified. It chooses
either your setting or the default setting, whichever is
appropriate.
If you are using the ACPI operating system, only the
low-battery alarm is available.
To cause the computer to return from standby mode and
resume operation, do one of the following:
v Press the Fn key.
v Open the LCD cover (only if you are using Windows Me
and you entered standby mode by closing the LCD
cover.)
v Turn on the power switch.
Also, the computer automatically returns from standby
mode and resumes operation in either of the following
events:
v The ring indicator (RI) is signaled by a serial device or a
PC Card device (Windows 2000 does not support the
ring indicator (RI) resume by PC Card device.)
v The time set on the resume timer elapses. In Windows
98, the Scheduled Tasks setting takes priority over the
Resume on timer selection in the “Power Management
Properties” window.
Note: The computer does not accept any input
immediately after it enters standby mode. Wait a
few seconds before taking any action to reenter
operation mode.

Hibernation mode
Note for Windows NT
If you are using Windows NT in the default format,
NTFS, you cannot create a hibernation file. If you
want to use hibernation mode, you will need to
reinstall Windows NT with FAT format.

General descriptions

31

Related service information

Note for OS/2
If you are using OS/2 in the default format, HPFS,
you cannot create a hibernation file. If you want to
use hibernation mode, you will need to reinstall
OS/2 with FAT format.
In hibernation mode, the following occurs:
v The system status, RAM, VRAM, and setup data are
stored on the hard disk.
v The system is powered off.
Note: If the computer enters the hibernation mode while it
is docked to the docking station, do not undock it
from the docking station before resuming normal
operation. If you do undock it and then try to
resume normal operation, you will get an error
message, and you will have to restart the system.
To cause the computer to enter hibernation mode, do any
of the following:
v Press the Fn + F12 keys.
v If you are using the APM operating system and have set
the mode to Power switch mode [Hibernation], turn
off the power switch.
v If you are using the ACPI operating system and have
defined one of the following actions as the event that
causes the system to go into hibernation mode, perform
that action.
– Closing the lid.
– Pressing the power button.
– Pressing Fn + F4 keys.
Also, the computer goes into hibernation mode
automatically in either of the following conditions:
v If a “hibernation time” has been set on the timer, and the
user does not do any operation with the keyboard, the
TrackPoint, the hard-disk drive, the parallel connector, or
the diskette drive within that time.
v If the timer conditions are satisfied in suspend mode.
v If you are using the APM operating system and have set
the mode to Hibernate when battery becomes low,
and the battery charge becomes critically low.
When the power is turned on, the computer returns from
hibernation mode and resumes operation. The hibernation
file in the boot record on the hard-disk drive is read, and
system status is restored from the hard-disk drive.

32

ThinkPad A20m/p, A21m/p, A22m/p

Checkout guide

Checkout guide
Use the following procedures as a guide in identifying and
correcting problems with the ThinkPad computer.
Note: The diagnostic tests are intended to test only IBM
products. The use of non-IBM products, prototype
cards, or modified options can lead to false
indications of errors and invalid system responses.
1. Identify the failing symptoms in as much detail as
possible.
2. Verify the symptoms. Try to re-create the failure by
running the diagnostic test or by repeating the
operation.

Testing the computer
The ThinkPad computer has a test program called
PC-Doctor® DOS (hereafter called PC-Doctor). You can
detect errors by running the diagnostics test included in
PC-Doctor. This section is an overview of the procedure.
For details that depend on model-unique functions, refer to
“Product overview” on page 41.
For some possible configurations of the computer,
PC-Doctor might not run correctly. To avoid this problem,
you need to initialize the computer setup by use of the IBM
BIOS Setup Utility before you run PC-Doctor. On the IBM
BIOS Setup Utility screen, press F9, Enter, F10, and then
Enter.
Note: When you initialize the computer configuration,
some devices are disabled, such as the serial port.
If you test one of these devices, you will need to
enable it by using PS2.EXE.
PC-Doctor cannot be used to test a device that is in the
docking station, even if the computer supports the docking
station. To test a USB device, connect it to the USB
connector of the computer. To test the Ultrabay 2000
device, install it in the Ultrabay 2000 slot of the computer.
To run the test, do as follows:
Note: In the following procedure, you can select an item
not only with the arrow keys, but also with the
TrackPoint. Instead of pressing Enter, click the left
button.
1. Insert the PC-Doctor disk into the diskette drive; then
power on the computer.
If the computer cannot be powered on, go to “Power
system checkout” on page 35, and check the power
sources.
General descriptions

33

Checkout guide

If an error code appears, go to “Symptom-to-FRU
index” on page 49.
On the first screen, select the model and press Enter.
Follow the instructions on the screen.
2. The main panel of PC-Doctor appears.
3. Select Diagnostics with the arrow keys, and press
Enter.
A pull-down menu appears. (Its exact form depends on
the model.)
The options on the test menu are as follows:
Diagnostics

Interactive Tests

v
v
v
v
v
v
v
v
v
v
v
v
v
v
v

v
v
v
v
v
v
v
v
v

Run Normal Test
Run Quick Test
CPU/Coprocessor
Systemboard
Video Adapter
Serial Ports
Parallel Ports
Fixed Disks
Diskette Drives
Other Devices
ZIP Drive (*)
LS-120 Drive (*)
Communication
Memory Test – Full
Memory Test – Quick

Keyboard
Video
Internal Speaker
Mouse
Joystick Test
Diskette
System Load
CD-ROM/DVD Test
Stereo Speaker

Notes:
v In the Keyboard test in Interactive Tests, the Fn key is
scanned only once. Each key should be held down for at least
2 seconds; otherwise, it cannot be sensed.
v The sound card is not recognized in the Stereo Speaker in the
Interactive Tests. To test it, use the audio device test in the
Other Devices (Diagnostics).
v Video Adapter test supports only the LCD display on
ThinkPad. Before running PC-Doctor DOS, detach the external
Monitor.
v ZIP Drive test and LS-120 Drive test are only for some
models. Some model do not have them.

Diagnostics

I n t e r a c t i v e Te s t s

Hardware Info

Utility

Quit

Run Normal Test
Run Quick Test
CPU/Coprocessor
Systemboard
Video Adapter
Serial Ports
Parallel Ports
Fixed Disks
Diskette Drives
Other Devices
ZIP Drive
Communication
Memory Test - Full
Memory Test - Quick

PC-DOCTOR 2.0 Copyright 2001 PC-Doctor, Inc. All Rights Reserved.

Use the cursor keys and ESC to move in menus. Press ENTER to select.

4. Run the applicable function test.

34

ThinkPad A20m/p, A21m/p, A22m/p

F1=Help

Checkout guide

5. Follow the instructions on the screen. If there is a
problem, PC-Doctor shows messages describing it.
6. To exit the test, select Quit — Exit Diag.
To cancel the test, press Esc.
Note: After executing PC-Doctor, check the system
time/date and reset them if needed.

Detecting system information with
PC-Doctor
PC-Doctor can detect the following system information:

Hardware Info
v
v
v
v
v
v
v
v
v
v

System Configuration
Memory Contents
Physical Disk Drives
Logical Disk Drives
VGA Information
IDE Drive Info
PCI Information
PNPISA Info
SMBIOS Info
VESA LCD Info

Utility
v
v
v
v
v
v
v
v
v
v
v

Run External Tests
Surface Scan Hard Disk
Benchmark System
DOS Shell
Tech Support Form
Battery Rundown
View Test Log
Print Log
Save Log
Full Erase Hard Drive
Quick Erase Hard Drive

Power system checkout
To
1.
2.
3.
4.

verify a symptom, do the following:
Power off the computer.
Remove the battery pack.
Connect the ac adapter.
Check that power is supplied when you power on the
computer.
5. Power off the computer.
6. Disconnect the ac adapter and install the charged
battery pack.
7. Check that the battery pack supplies power when you
power on the computer.
If you suspect a power problem, see the appropriate one
of the following power supply checkouts:
General descriptions

35

Checkout guide

v
v
v
v

“Checking
“Checking
“Checking
“Checking

the ac adapter”
operational charging”
the battery pack” on page 37
the backup battery” on page 37

Checking the ac adapter
You are here because the computer fails only when the ac
adapter is used:
v If the power problem occurs only when the port
replicator is used, replace the port replicator.
v If the power-on indicator does not turn on, check the
power cord of the ac adapter for correct continuity and
installation.
v If the computer does not charge during operation, go to
″Checking operational charging.″
To check the ac adapter, do the following:
1. Unplug the ac adapter cable from the computer.
2. Measure the output voltage at the plug of the ac
adapter cable. See the following figure:

2
1

Pin

Voltage (V dc)

1

+15.5 to +17.0

2

Ground

(16 - 10 V)
3. If the voltage is not correct, replace the ac adapter.
4. If the voltage is acceptable, do the following:
v Replace the system board.
v If the problem persists, go to “Product overview” on
page 41.
Note: Noise from the ac adapter does not always indicate
a defect.

Checking operational charging
To check whether the battery charges properly during
operation, use a discharged battery pack or a battery pack
that has less than 50% of the total power remaining when
installed in the computer.
Perform operational charging. If the battery status indicator
or icon does not turn on, remove the battery pack and let it
return to room temperature. Reinstall the battery pack. If
the charge indicator or icon still does not turn on, replace
the battery pack.
If the charge indicator still does not turn on, replace the
system board. Then reinstall the battery pack. If it is still
not charged, go to the next section.

36

ThinkPad A20m/p, A21m/p, A22m/p

Checkout guide

Checking the battery pack
Battery charging does not start until the Power Meter
shows that less than 95% of the total power remains;
under this condition the battery pack can charge to 100%
of its capacity. This protects the battery pack from being
overcharged or from having a shortened life.
To check the status of your battery, move your cursor to
the Power Meter icon in the icon tray of the Windows
taskbar and wait for a moment (but do not click), and the
percentage of battery power remaining is displayed. To get
detailed information about the battery, double-click the
Power Meter icon.
Note: If the battery pack becomes hot, it may not be able
to charge. Remove it from the computer and leave it
at room temperature for a while. After it cools down,
reinstall and recharge it.
To check the battery pack, do the following:
1. Power off the computer.
2. Remove the battery pack and measure the voltage
between battery terminals 1 (+) and 5 (−). See the
following figure:

5(-) 4

3

2

1(+)

Terminal

Voltage (V dc)

1

+ 0 to + 12.6

5

Ground (−)

3. If the voltage is less than +11.0 V dc, the battery pack
has been discharged.
Note: Recharging will take at least 3 hours, even if the
indicator does not turn on.
If the voltage is still less than +11.0 V dc after
recharging, replace the battery.
4. If the voltage is more than +11.0 V dc, measure the
resistance between battery terminals 4 and 5. The
resistance must be 4 to 30 K .
If the resistance is not correct, replace the battery
pack. If the resistance is correct, replace the system
board.

Checking the backup battery
Do the following:
1. Power off the computer, and unplug the ac adapter
from it.
2. Turn the computer upside down.
General descriptions

37

Checkout guide

3. Remove the battery pack (see “1010 Battery pack” on
page 60 ).
4. Remove the backup battery (see “Checking the battery
pack” on page 37).
5. Measure the voltage of the backup battery. See the
following figure.

Red (+)

Black (-)

Wire

Voltage (V dc)

Red

+2.5 to +3.2

Black

Ground

v If the voltage is correct, replace the system board.
v If the voltage is not correct, replace the backup battery.
v If the backup battery discharges quickly after
replacement, replace the system board.

38

ThinkPad A20m/p, A21m/p, A22m/p

ThinkPad A20m/p, A21m/p and
A22m/p
Product overview . . . . . . . . . . . .
Specifications . . . . . . . . . . . .
Status indicators . . . . . . . . . . .
FRU tests . . . . . . . . . . . . .
Fn key combinations . . . . . . . . . .
Symptom-to-FRU index . . . . . . . . . .
Numeric error codes . . . . . . . . . .
Error messages . . . . . . . . . . .
Beep symptoms . . . . . . . . . . .
No beep symptoms . . . . . . . . . .
LCD-related symptoms . . . . . . . . .
Intermittent problems . . . . . . . . . .
Undetermined problems . . . . . . . . .
FRU replacement notices . . . . . . . . .
Screw notices . . . . . . . . . . . .
Retaining serial numbers. . . . . . . . .
Restoring the serial number of the system unit
Retaining the UUID . . . . . . . . .
Removing and replacing a FRU. . . . . . . .
1010 Battery pack. . . . . . . . . . .
1020 DIMM . . . . . . . . . . . .
1030 Mini PCI adapter . . . . . . . . .
For A20m/p, A21m/p series . . . . . . .
For A22m/p series . . . . . . . . .
1040 Backup battery . . . . . . . . . .
1050 Hard-disk drive or RF ID adapter . . . .
1060 Ultrabay 2000 device . . . . . . . .
1070 Keyboard . . . . . . . . . . .
1080 Keyboard CRU insulator . . . . . . .
1090 Hinge cover and clear sheet icon . . . .
1100 Keyboard bezel and speaker . . . . . .
1110 Microphone and speaker cable . . . . .
For A20m/p and A21m/p series (microphone and
speaker cable) . . . . . . . . . .
For A22m/p series (speaker cable) . . . . .
1120 Sub card . . . . . . . . . . . .
1130 PC Card slot assembly . . . . . . .
1140 Fan assembly . . . . . . . . . .
1150 Diskette drive . . . . . . . . . .
1160 Upper shield. . . . . . . . . . .
1170 TV card . . . . . . . . . . . .
1180 CPU socket and CPU . . . . . . . .
1190 System board and RJ45/11 connector
assembly . . . . . . . . . . . .
For A20m/p and A21m/p series . . . . . .
For A22m/p series . . . . . . . . .
Thermal rubbers location. . . . . . . . .
2010 LCD assembly . . . . . . . . . .
2020 Front bezel . . . . . . . . . . .

41
41
44
46
48
49
49
52
53
53
54
55
55
56
56
57
57
57
59
60
61
63
64
65
66
67
69
71
74
75
76
78

© Copyright IBM Corp. 2001

39

78
79
80
82
83
85
87
88
89
91
92
92
93
94
96

12.1-in. panel . . . . . . . . .
14.1-in. and 15.0-in. panels . . . . .
2030 Inverter card . . . . . . . .
12.1-in. panel . . . . . . . . .
14.1-in. and 15.0-in. panels . . . .
2040 LCD panel . . . . . . . . .
12.1-in. panel. . . . . . . . .
14.1-in. and 15.0-in. panels . . . .
3010 ThinkPad Dock PCI cover . . . .
3020 ThinkPad Dock top cover . . . .
Locations . . . . . . . . . . . .
Front view. . . . . . . . . . .
Rear view . . . . . . . . . . .
Bottom view . . . . . . . . . .
Parts list . . . . . . . . . . . .
A series model matrix . . . . . . .
Overall . . . . . . . . . . .
AC adapter . . . . . . . . . .
LCD FRUs . . . . . . . . . .
12.1-in. SVGA TFT . . . . . . .
14.1-in. XGA TFT . . . . . . .
15.0-in. XGA TFT (LG) . . . . . .
15.0-in. XGA TFT (SAMSUNG) . . .
15.0-in. SXGA+ TFT . . . . . .
15.0-in. UXGA TFT . . . . . . .
Keyboard . . . . . . . . . . .
Recovery CDs . . . . . . . . .
For Windows 98 (A22m) . . . . .
For Windows 98 (A22p) . . . . .
For Windows 2000 (A22m). . . . .
For Windows 2000 (A22p) . . . . .
For Windows 2000/Windows NT (A22m)
For Windows 2000/Windows NT (A22p) .
Miscellaneous parts . . . . . . . .
Optional FRUs . . . . . . . . .
Common parts list . . . . . . . .
Tools . . . . . . . . . . .
Power cords (system) . . . . . .
Power cords (docking station) . . . .
Notices . . . . . . . . . . . .
Trademarks . . . . . . . . . .

40

ThinkPad A20m/p, A21m/p, A22m/p

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Product overview

Product overview
This section presents the following product-unique
information:
v “Specifications”
v “Status indicators” on page 44
v “FRU tests” on page 46
v “Fn key combinations” on page 48

Specifications
The following table lists the specifications of the ThinkPad
A20m/p, A21m/p and A22m/p series:
Feature

Description

Processor

A20m
v Intel® Celeron® processor 500 MHz, L2
256-KB cache
v Intel® Celeron® processor 550 MHz, L2
256-KB cache
v Mobile Intel® Pentium® III processor
500 MHz, L2 256-KB cache
v Mobile Intel® Pentium® III processor at
600 MHz featuring Intel® SpeedStep™
technology
v Mobile Intel® Pentium® III processor at
650 MHz featuring Intel® SpeedStep™
technology
v Mobile Intel® Pentium® III processor at
700 MHz featuring Intel® SpeedStep™
technology
A20p
v Mobile Intel® Pentium® III processor at
700 MHz featuring Intel® SpeedStep™
technology
v Mobile Intel® Pentium® III processor at
750 MHz featuring Intel® SpeedStep™
technology
A21m
v Mobile Intel® Pentium® III processor at
700 MHz featuring Intel® SpeedStep™
technology
v Mobile Intel® Pentium® III processor at
750 MHz featuring Intel® SpeedStep™
technology
v Mobile Intel® Pentium® III processor at
800 MHz featuring Intel® SpeedStep™
technology

(continued)

ThinkPad A20m/p, A21m/p and A22m/p

41

Product overview
Feature

Description

Processor

A21p
v Mobile Intel® Pentium® III processor at
850 MHz featuring Intel® SpeedStep™
technology
A22m
v Mobile Intel® Pentium® III processor at
800 MHz featuring Intel® SpeedStep™
technology
v Mobile Intel® Pentium® III processor at
850 MHz featuring Intel® SpeedStep™
technology
v Mobile Intel® Pentium® III processor at
900 MHz featuring Intel® SpeedStep™
technology
v Mobile Intel® Pentium® III processor at
1 GHz featuring Intel® SpeedStep™
technology
A22p
v Mobile Intel® Pentium® III processor at
1 GHz featuring Intel® SpeedStep™
technology

Bus architecture

PCI Bus

Memory (standard)

A20m/p
v 64 MB (on the system board)
v 128 MB (on the system board)
A21m/p
v 64 MB (on the system board)
v 128 MB (on the system board)
v 64 MB (64 MB SO-DIMM × 1)
v 128 MB (128 MB SO-DIMM × 1)
A22m/p
v 64 MB (64 MB SO-DIMM × 1)
v 128 MB (128 MB SO-DIMM × 1)

Memory (optional)

64 MB, 128 MB, or 256 MB DIMM card
(maximum of 512 MB)

CMOS RAM

114 bytes + 128 bytes

Display

v 12.1-inch, 16M colors, SVGA (800×600
resolution) TFT color LCD
v 14.1-inch, 16M colors, XGA (1024×768
resolution) TFT color LCD
v 15.0-inch, 16M colors, XGA (1024×768
resolution) TFT color LCD
v 15.0-inch, 16M colors, SXGA+
(1400×1050 resolution) TFT color LCD
v 15.0-inch, 16M colors, UXGA
(1600×1200 resolution) TFT color LCD

(continued)

42

ThinkPad A20m/p, A21m/p, A22m/p

Product overview
Feature

Description

Diskette drive

1.44 MB (3-mode), 3.5-inch

Hard-disk drive

A20m/p
v 6.0 GB, 2.5-inch, IDE interface
v 12.0 GB, 2.5-inch, IDE interface
v 18.0 GB, 2.5-inch, IDE interface
v 20.0 GB, 2.5-inch, IDE interface
A21m/p
v 10.0 GB, 2.5-inch, IDE interface
v 20.0 GB, 2.5-inch, IDE interface
v 32.0 GB, 2.5-inch, IDE interface
A22m/p
v 10.0 GB,
v 20.0 GB,
v 30.0 GB,
v 32.0 GB,

2.5-inch,
2.5-inch,
2.5-inch,
2.5-inch,

IDE
IDE
IDE
IDE

interface
interface
interface
interface

I/O port

v
v
v
v
v
v
v
v
v
v
v
v
v

Internal modem

56.6 Kbps

Audio

v Internal microphone (for A20m/p,
A21m/p)
v Internal speaker
v Software control volume

External monitor
Line-in
Headphone
Microphone
Mouse or keyboard
Parallel
Port replicator connector
Serial
Universal serial bus (USB) connector
RJ11
RJ45
TV-in/out (for MT2629)
TV-out (for MT2628-Fxx, Gxx, Sxx, Txx,
MT2623-Gxx, Txx)

Infrared transfer

IrDA 1.1

PC Card

One Type-III or two Type-II

AC adapter

72-watt type

Bay device

A20m/p
v 10-24 x CD-ROM drive
v 6 x DVD drive
A21m/p, A22m/p
v 10-24 x CD-ROM drive
v 8 x DVD drive

ThinkPad A20m/p, A21m/p and A22m/p

43

Product overview

Status indicators
The system status indicators show the status of the
computer, as follows:

Indicator

Meaning


1 Battery

Green:
The battery is fully charged.
Blinking green:
The battery has enough power to
operate, but is being charged.
Orange: The battery power is low. The battery
is to being charged.
Blinking orange:
The battery needs to be charged.
when the indicator starts blinking
orange, the computer beeps three
times.


2 Standby
status

Green:
The computer is in standby mode.
Blinking green:
The computer is entering standby
mode or hibernation mode, or is
resuming normal operation. This
indicator does not blink in Windows
2000 and Windows Me.


3 Drive in
use

Green:

Data is being read from or written to
the hard-disk drive, the diskette drive,
or the drive in the Ultrabay 2000.
When this indicator is on, do not put
the computer into standby mode or
turn off the computer.

Note: Do not move the system while the Green
drive in use light is on. Sudden physical shock
could cause drive errors.

(continued)

44

ThinkPad A20m/p, A21m/p, A22m/p

Product overview
Indicator

Meaning


4 Num lock

Green:

The numeric keypad on the keyboard
is enabled. To enable or disable the
keypad, press and hold the Shift key
while pressing the NumLk key.


5 Caps lock

Green:

Caps Lock mode is enabled. To
enable or disable Caps Lock mode,
press Caps Lock key.


6 Scroll lock Green:

Scroll Lock mode is enabled. Arrow
keys can be used as screen-scroll
function keys, but not to move the
cursor. To enable or disable Scroll
Lock mode, press ScrLk key. Not all
application programs support this
function.


7 Power on

This indicator stays lighted whenever
the computer is on. If the power-on
indicator is on and the standby
indicator is off, the system is ready to
use. If both the power-on indicator
and the standby indicator are on, you
can use the computer after it returns
from the standby mode and the
standby indicator goes off.

Green:

ThinkPad A20m/p, A21m/p and A22m/p

45

Product overview

FRU tests
The following table shows the test for each FRU.
FRU

Applicable test

System board

1. Diagnostics --> CPU/Coprocessor
2. Diagnostics --> Systemboard

Power

Diagnostics --> Other Devices --> IBM AC
Adapter, IBM Battery 1 (IBM Battery 2)

LCD unit

1. Diagnostics --> Video Adapter
2. Interactive Tests --> Video

Modem

1. Make sure the modem is set up correctly.
2. Replace the modem jack and the modem
card in turn, and run the following test in
Diagnostics --> Communication:
a. Lucent Modem (M2) Loopback
b. Lucent Modem (M2) Dialtone/DTM
c. Intel Modem Register
d. Intel Modem Loopback/DTMF
e. Intel SP Modem Register
f. Intel SP Modem Loopback/DTMF
g. 3Com MiniPCI Modem Test
h. 3Com MiniPCI Dialtone Test

Audio

1. Interactive Tests --> Internal Speaker
2. Diagnostics --> Other Devices --> Crystal
SoundFusion™ Test

Speaker

Interactive Tests --> Internal Speaker

PC Card slots

Diagnostics --> Systemboard --> PCMCIA,
PCMCIA External Loop

Keyboard

1. Diagnostics --> Systemboard -->
Keyboard
2. Interactive Tests --> Keyboard

TrackPoint or
pointing device

If the TrackPoint does not work, check the
configuration in the ThinkPad Configuration
program. If the TrackPoint is disabled, select
Enable to enable it.
After you use the TrackPoint, the pointer may
drift on the screen for a short time. This drift
can occur when a slight, steady pressure is
applied to the TrackPoint pointer. This symptom
is not a hardware problem. If the pointer stops
after a short time, no service action is
necessary.
If enabling the TrackPoint does not correct the
problem, continue with the following:
v Interactive Tests --> Mouse

Hard-disk drive

Diagnostics --> Fixed Disks

Diskette drive

1. Diagnostics --> Diskette Drives
2. Interactive Tests --> Diskette

(continued)

46

ThinkPad A20m/p, A21m/p, A22m/p

Product overview
FRU

Applicable test

CD-ROM or
DVD drive

1. Diagnostics --> Other Devices -->
CD-ROM/DVD
2. Interactive Tests --> CD-ROM/DVD Test

Memory

1. If two DIMMs are installed, remove one of
them and run Diagnostics --> Memory
Test - Quick.
2. If the problem does not recur, return the
DIMM to its place, remove the other one,
and run the test again.
3. If the test does not detect the error, run
Diagnostics --> Memory Test - Full.

Fan

1. Turn on the computer and check the air
turbulence at the louver near the power
switch.
2. Run Diagnostics --> Other Devices -->
IBM Fan.

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47

Product overview

Fn key combinations
The following table shows the function of each combination
of Fn with a function key.
Key
combination

Description

Fn + F1

Reserved.

Fn + F2

Reserved.

Fn + F3

Turn off the LCD display, leaving the screen
blank. To turn the LCD display on again, press
any key or the TrackPoint stick.

Fn + F4

Turn standby mode on. To return to normal
operation, press the Fn key independently,
without pressing a function key.

Fn + F5

Reserved.

Fn + F6

Reserved.

Fn + F7

Switch between the LCD and an external
monitor (CRT). If an external monitor is
attached, computer output is displayed in the
following three patterns by turns:
v CRT display
v LCD + CRT display
v LCD

Fn + F8

Turn screen expansion on or off. (There is no
symbol on the key.)

Fn + F9

Reserved.

Fn + F10

Reserved.

Fn + F11

Reserved.

Fn + F12

Turn hibernation mode on. To return to normal
operation, press the power button for less than
four seconds.

Fn + PgUp

Turn the ThinkLight on or off.

Fn + Home

The LCD becomes brighter.

Fn + End

The LCD becomes less bright.

48

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Symptom-to-FRU index

Symptom-to-FRU index
The symptom-to-FRU index in this section lists symptoms
and errors and their possible causes. The most likely
cause is listed first, in boldface type.
Note: Do the FRU replacement or other actions in the
sequence shown in the column headed “FRU or
action, in sequence.” If replacing a FRU does not
solve the problem, put the original part back in the
computer. Do not replace a nondefective FRU.
This index can also help you determine, during regular
servicing, what FRUs are likely to need to be replaced
next.
A numeric error is displayed for each error detected in
POST or system operation. In the displays, n can be any
number.
If no numeric code is displayed, check the narrative
descriptions of symptoms. If the symptom is not described
there, go to “Intermittent problems” on page 55.

Note
For an IBM device not supported by diagnostic
codes in the ThinkPad notebook computers, see the
manual for that device.

Numeric error codes
Symptom or error

FRU or action, in sequence

0175
Bad CRC1, stop POST task —
The EEPROM checksum is not
correct.

System board.

0187
EAIA data access error — The
access to EEPROM has failed.

System board.

0188
Invalid RFID serialization
information area or bad CRC2
— The EEPROM checksum is
not correct.

System board.

0189
Invalid RFID configuration
information area — The
EEPROM checksum is not
correct.

System board.

(continued)

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49

Symptom-to-FRU index
Symptom or error

FRU or action, in sequence

0190
Critical low battery error.

1. Charge the battery pack.
2. Battery pack.

0193
RF antenna has been removed.

Enter the supervisor
password.

0194
The computer has been carried
through a security gate.

Enter the supervisor
password.

0200
Hard disk error — The hard
disk is not working.

1. Reseat the hard-disk
drive.
2. Load Setup Defaults in IBM
BIOS Setup Utility.
3. Hard-disk drive.
4. System board.

021x
Stuck key — Keyboard error.

Run interactive tests of the
keyboard and the auxiliary
input device.

0220
Monitor type error — Monitor
type does not match the one
specified in CMOS.

Load Setup Defaults in IBM
BIOS Setup Utility.

0230
Shadow RAM error — The
shadow RAM failure at offset
nnnn.

System board.

0231
System RAM error — System
RAM failure at offset nnnn.

1. DIMM.
2. System board.

0232
Extended RAM error —
Extended RAM failure at offset
nnnn.

1. DIMM.
2. System board.

0250
System battery error — System
battery is dead.

Replace the backup battery
and run IBM BIOS Setup
Utility to reset the time and
date.

0251
System CMOS checksum
bad—Default configuration
used.

Replace the backup battery
and run IBM BIOS Setup
Utility to reset the time and
date.

0252
Password checksum bad —
The password is cleared.

Reset the password by
running IBM BIOS Setup
Utility.

0260
System timer error.

1. Replace the backup
battery and run IBM BIOS
Setup Utility to reset the
time and date.
2. System board.

(continued)

50

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Symptom-to-FRU index
Symptom or error

FRU or action, in sequence

0270
Real-time clock error.

1. Replace the backup
battery and run IBM BIOS
Setup Utility to reset the
time and date.
2. System board.

0271
Date and time error — Neither
the date nor the time is set in
the computer.

Run IBM BIOS Setup Utility to
reset the time and date.

02B2
Incorrect drive A type.

1. Diskette drive.
2. External FDD cable.
3. I/O card.

02F4
EISA CMOS not writable.

1. Load Setup Defaults in
IBM BIOS Setup Utility.
2. Replace the backup battery.
3. System board.

02F5
DIMM test failure.

1. DIMM.
2. System board.

02F6
Software NMI failure.

1. DIMM.
2. System board.

02F7
Fail-safe timer NMI failure.

1. DIMM.
2. System board.

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51

Symptom-to-FRU index

Error messages
Symptom or error

FRU or action, in sequence

Device address conflict.

1. Load Setup Defaults in
IBM BIOS Setup Utility.
2. Backup battery.
3. System board.

Allocation error for device.

1. Load Setup Defaults in
IBM BIOS Setup Utility.
2. Backup battery.
3. System board.

Failing bits: nnnn.

1. DIMM.
2. System board.

Invalid system configuration
data.

1. DIMM.
2. System board.

I/O device IRQ conflict.

1. Load Setup Defaults in
IBM BIOS Setup Utility.
2. Backup battery.
3. System board.

Operating system not found.

1. Check that the operating
system has no failure and is
installed correctly.
2. Enter IBM BIOS Setup
Utility and see whether
the hard-disk drive and
the diskette drive are
properly identified.
3. Reseat the hard-disk drive.
4. Reinstall the operating
system.
5. Diskette drive.
6. Hard-disk drive.
7. System board.

Hibernation error.

1. Restore the system
configuration to what it
was before the computer
entered hibernation mode.
2. If memory size has been
changed, re-create the
hibernation file.

Fan error.

Fan.

52

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Symptom-to-FRU index

Beep symptoms
Symptom or error

FRU or action, in sequence

One beep and a blank,
unreadable, or flashing LCD.

1. Reseat the LCD
connector.
2. LCD assembly.
3. External CRT.
4. System board.

One long and two short beeps,
and a blank or unreadable
LCD.

1. System board.
2. LCD assembly.
3. DIMM.

Two short beeps with error
codes.

POST error. See “Numeric
error codes” on page 49.

Two short beeps with blank
screen.

1. System board.
2. DIMM.

Two or more beeps, or a
continuous beep. Operating
System starts successfully.

If a mini-PCI Ethernet card is
installed, confirm that Alert On
LAN 2 in IBM BIOS Setup
Utility is disabled.

Three short beeps, pause,
three more short beeps, and
one short beep.

1. DIMM.
2. System board

Only cursor appears.

Reinstall operating system.

No beep symptoms
Symptom or error

FRU or action, in sequence

No beep, power-on indicator
on, LCD blank, and no POST.

1. Make sure that every
connector is connected
tightly and correctly.
2. DIMM.
3. System board.

No beep, power-on indicator
on, and LCD blank during
POST.

1. Reseat DIMM.
2. System board.

The power-on password
prompt.

A power-on password or a
supervisor password is set.
Type the password and press
Enter.

The hard-disk password
prompt.

A hard-disk password is set.
Type the password and press
Enter.

The DOS full screen looks
smaller.

Start the ThinkPad
Configuration program and set
the Screen expansion
function.

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53

Symptom-to-FRU index

LCD-related symptoms
Important
The TFT LCD for the notebook computer contains
many thin-film transistors (TFTs). A small number of
dots that are missing, discolored, or always lighted
is characteristic of TFT LCD technology, but
excessive pixel problems can cause viewing
concerns. The LCD should be replaced if the
number of missing, discolored, or lighted dots in any
background is:
v SVGA: 5 or more bright dots, 5 or more dark
dots, or a total of 9 or more bright and dark dots.
v XGA: 8 or more bright dots, 8 or more dark dots,
or a total of 9 or more bright and dark dots.
v SXGA+: 11 or more bright dots, 13 or more dark
dots, or a total of 16 or more bright and dark
dots.
v UXGA: 11 or more bright dots, 16 or more dark
dots, or a total of 16 or more bright and dark
dots.
Note: A bright dot is a white or colored pixel that is
always on. A dark dot is a pixel that is always
off and shows as black.
Symptom or error

FRU or action, in sequence

No beep, power-on indicator
on, and a blank LCD during
POST.

System board.

v LCD backlight not working.
v LCD too dark.
v LCD brightness cannot be
adjusted.
v LCD contrast cannot be
adjusted.

1. Reseat the LCD
connectors.
2. LCD assembly.
3. System board.

v
v
v
v

1. See important note for
“LCD-related symptoms”.
2. Reseat all LCD connectors.
3. LCD assembly.
4. System board.

LCD screen unreadable.
Characters missing pixels.
Screen abnormal.
Wrong color displayed.

Horizontal or vertical lines
displayed on LCD.

54

LCD assembly.

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Symptom-to-FRU index

Intermittent problems
Intermittent system hang problems can be due to a variety
of causes 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 problem recurs.
When analyzing an intermittent problem, do the following:
1. Run the diagnostic test for the system board in loop
mode at least 10 times.
2. If no error is detected, do not replace any FRUs.
3. If any error is detected, replace the FRU shown by the
FRU code. Rerun the test to verify that no more errors
exist.

Undetermined problems
You are here because the diagnostic tests did not identify
which adapter or device failed, wrong devices are installed,
a short circuit is suspected, or the system is inoperative.
Follow these procedures to isolate the failing FRU (do not
isolate FRUs that have no defects).
Verify that all attached devices are supported by the
computer.
Verify that the power supply being used at the time of the
failure is operating correctly. (See “Power system
checkout” on page 35.)
1. Power off the computer.
2. Visually check each FRU for damage. Replace any
damaged FRU.
3. Remove or disconnect all of the following devices:
a. Non-IBM devices
b. Devices attached to the port replicator
c. Printer, mouse, and other external devices
d. Battery pack
e. Hard-disk drive
f. External diskette drive
g. DIMM
h. CD-ROM and diskette drive in the UltraslimBay
i. PC Cards
4. Power on the computer.
5. Determine whether the problem has changed.
6. If the problem does not recur, reconnect the removed
devices one at a time until you find the failing FRU.
7. If the problem remains, replace the following FRUs one
at a time (do not replace a nondefective FRU):
a. System board
b. LCD assembly

ThinkPad A20m/p, A21m/p and A22m/p

55

FRU replacement notices

FRU replacement notices
This section contains notices related to removing and
replacing parts. Read this section carefully before replacing
any FRU.

Screw notices
Loose screws can cause a reliability problem. In IBM
ThinkPad computer, this problem is addressed with special
nylon-coated screws that have the following characteristics:
v They maintain tight connections.
v They do not easily come loose, even with shock or
vibration.
v They are harder to tighten.
v They should be used only once.
Do the following when you service this machine:
v Keep the screw kit (for the P/N, see “Miscellaneous
parts” on page 145) in your tool bag.
v Always use new screws.
v Use a torque screwdriver if you have one.
Tighten screws as follows:
v Plastic to plastic
Turn an additional 90 degrees after the screw head
touches the surface of the plastic part:

90 degrees more

(Cross-section)
v Logic card to plastic
Turn an additional 180 degrees after the screw head
touches the surface of the logic card:

180 degrees more

(Cross-section)
v Torque driver
If you have a torque driver, refer to the “Torque” column
for each step.

56

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FRU replacement notices

v Make sure you use the correct screw. If you have a
torque screwdriver, tighten all screws firmly to the torque
shown in the table. Never use a screw that you
removed. Use a new one. Make sure the screws are
tightened firmly.

Retaining serial numbers
This section includes the following descriptions:
v “Restoring the serial number of the system unit”
v “Retaining the UUID”

Restoring the serial number of the system
unit
When the computer was manufactured, the EEPROM on
the system board was loaded with the serial numbers of
the system and all major components. These numbers
need to remain the same throughout the life of the
computer.
If you replace the system board, you must restore the
serial number of the system unit to its original value.
Before replacing the system board, save the original serial
number by doing the following:
1. Install the ThinkPad hardware maintenance diskette
version 1.62, and restart the computer.
2. From the main menu, select 1. Set System
Identification.
3. Select 2. Read S/N data from EEPROM.
The serial number for each device is displayed. Write
down the serial number of the system unit, designated as
follows:
20: System unit serial number
After you have replaced the system board, restore the
serial number by doing the following:
1. Install the ThinkPad hardware maintenance diskette
version 1.62 and restart the computer.
2. From the main menu, select 1. Set System
Identification.
3. Select 1. Add S/N data from EEPROM.
Follow the instructions on the screen.
Note: The serial number of the system unit is written on
the label attached on the bottom of the computer.

Retaining the UUID
The Universally Unique Identifier (UUID) is a 128-bit
number uniquely assigned to your computer at production
and stored in the EEPROM of your system board. The
algorithm that generates the number is designed to provide

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57

FRU replacement notices

unique IDs until the year A.D. 3400. No two computers in
the world have the same number.
When you replace the system board, you must set the
UUID on the new system board as follows:
1. Install the ThinkPad hardware maintenance diskette
version 1.62, and restart the computer.
2. From the main menu, select 4. Assign UUID.
A new UUID is created and written. If a valid UUID
already exists, it is not overwritten.

58

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Removing and replacing a FRU

Removing and replacing a FRU
This section presents directions and drawings for use in
removing and replacing a FRU. Be sure to observe the
following general rules:
1. Do not try to service any computer unless you have
been trained and certified. An untrained person runs
the risk of damaging parts.
2. Before replacing any FRU, review “FRU replacement
notices” on page 56.
3. Begin by removing any FRUs that have to be removed
before the failing FRU. Any such FRUs are listed at the
top of the page. Remove them in the order in which
they are listed.
4. Follow the correct sequence in the steps for removing
the FRU, as indicated in the drawings by the numbers
in square callouts.
5. When turning a screw to replace a FRU, turn it in the
direction indicated by the arrow in the drawing.
6. When removing the FRU, move it in the direction
indicated by the arrow in the drawing.
7. To put the new FRU in place, reverse the removal
procedure and follow any notes that pertain to
replacement. For information about connecting and
arranging internal cables, see “Locations” on page 112.
8. When replacing a FRU, use the correct screw as
shown in the procedures.

DANGER
Before removing any FRU, power off the computer,
unplug all power cords from electrical outlets,
remove the battery pack, and then disconnect any
interconnecting cables.

Attention: Before the computer is powered on after FRU
replacement, make sure that all screws, springs, and other
small parts are in place and are not loose inside the
computer. Verify this by shaking the computer gently and
listening for rattling sounds. Metallic parts or metal flakes
can cause electrical short circuits.
Attention: The system board is sensitive to, and can be
damaged by, electrostatic discharge. Before touching it,
establish personal grounding by touching a ground point
with one hand or by using an electrostatic discharge (ESD)
strap (P/N 6405959).
ThinkPad A20m/p, A21m/p and A22m/p

59

Removing and replacing a FRU

1010 Battery pack

DANGER
Use only the battery in the parts listing for your
computer. Use of an incorrect battery can result in
ignition or explosion of the battery.

60

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Removing and replacing a FRU

1020 DIMM
For access, remove this FRU:
v “1010 Battery pack” on page 60
Note: Loosen the screw 
1, but do not remove it.

(continued)

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Removing and replacing a FRU

When installing: With the notched end of the DIMM
toward the socket, insert the DIMM into
the socket, then press it firmly. Pivot the
DIMM until it snaps into place. Make
sure that the card is firmly fixed in the
slot and does not move easily.

62

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Removing and replacing a FRU

1030 Mini PCI adapter
For access, remove this FRU:
v “1010 Battery pack” on page 60
Note: Loosen the screw 
1, but do not remove it.

1

2

(continued)

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Removing and replacing a FRU

For A20m/p, A21m/p series

Note: The illustration shows the combo card. Connector
(A) is for the LAN feature and (B) is for the modem
feature. This slot also supports a Mini PCI modem
card or Mini PCI network card. Step 
5 depends
on the card type. Disconnect either (A), (B) or both.
When installing the card, do the following:
v With the notched end of the card toward the socket,
insert the card into the socket, then press it firmly. Pivot
the card until it snaps into place. Make sure that the
card is firmly fixed in the slot and does not move easily.
v Make sure that the connector (A) is placed under the
card when reinstalling the Mini PCI adapter.

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Removing and replacing a FRU

For A22m/p series

Note: The illustration shows the combo card. Connector
(A) is for the LAN feature and (B) is for the modem
feature. This slot also supports a Mini PCI modem
card or Mini PCI network card. Step 
4 depends
on the card type. Disconnect either (A), (B) or both.
When installing: With the notched end of the card toward
the socket, insert the card into the
socket, then press it firmly. Pivot the
card until it snaps into place. Make sure
that the card is firmly fixed in the slot
and does not move easily.

ThinkPad A20m/p, A21m/p and A22m/p

65

Removing and replacing a FRU

1040 Backup battery

DANGER
Use only the battery in the parts listing for your
computer. Use of an incorrect battery can result in
ignition or explosion of the battery.

For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1020 DIMM” on page 61
v “1030 Mini PCI adapter” on page 63

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Removing and replacing a FRU

1050 Hard-disk drive or RF ID adapter
Attention
Do not drop or apply any shock to the hard-disk
drive. The hard-disk drive is sensitive to physical
shock. Incorrect handling can cause damage and
permanent loss of data.
Before removing the drive, have the user make a
backup copy of all the information on the drive if
possible.
Never remove the drive while the system is
operating or is in suspend mode.
For access, remove this FRU:
v “1010 Battery pack” on page 60

Note: The hard disk is attached to the cover.
Step

Screw (quantity)


1

Coin screw (1) or security screw (1)

Note: Use a 2.5-mm Allen wrench to remove the security screw.

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Removing and replacing a FRU

When installing: Make sure that the HDD connector is
firmly connected.

68

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Removing and replacing a FRU

1060 Ultrabay 2000 device
Any of several devices can be inserted into the Ultrabay
2000. The procedure for installing and removing is the
same for every device.
Note: When you release the switch in step 
1 the lever
pops out. Pull the lever a little in step 
2 to release
the device from the bay.

(continued)

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Removing and replacing a FRU

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Removing and replacing a FRU

1070 Keyboard
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69

1

Step

Screw (quantity)

Torque


1

M2.5 × 15 mm, nylon-coated (3)

0.392 Nm
(4 kgfcm)

(continued)

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Removing and replacing a FRU

(continued)

72

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Removing and replacing a FRU

When installing: When installing the keyboard, do as
follows:
1. Install the new keyboard, following the directions in the
figure. Make sure that the keyboard edges, shown in
the figure as (A), (B), and (C), are under the frame.

2. Push the Y key 
1 to connect the keyboard to the
connector on the underside of the key; then push the
frame of the keyboard 
2 to latch the latches.

3. After the fastening of three screws of bottom side, push
the Y key again to connect the keyboard firmly to the
connector on the underside of the key.

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Removing and replacing a FRU

1080 Keyboard CRU insulator
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71

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Removing and replacing a FRU

1090 Hinge cover and clear sheet icon
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71
v “1080 Keyboard CRU insulator” on page 74

Step

Screw (quantity)

Torque


1

M2.5 × 15 mm, nylon-coated (1)

0.392 Nm
(4 kgfcm)

When installing: Stick the new clear sheet icon suitable
for the model onto the new hinge cover,
and then attach it to the computer.

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Removing and replacing a FRU

1100 Keyboard bezel and speaker
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71
v “1080 Keyboard CRU insulator” on page 74
v “1090 Hinge cover and clear sheet icon” on page 75

Step

Screw (quantity)

Torque


1

M2.5 × 4.8 mm, nylon-coated (7)

0.392 Nm
(4 kgfcm)

(continued)

76

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Removing and replacing a FRU

Step

Screw (quantity)

Torque


2

M2.5 × 15 mm, nylon-coated (2)

0.392 Nm
(4 kgfcm)

Cable routing: When replacing the cable, see the
preceding figure for its cable routing.

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Removing and replacing a FRU

1110 Microphone and speaker cable
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71
v “1080 Keyboard CRU insulator” on page 74
v “1090 Hinge cover and clear sheet icon” on page 75
v “1100 Keyboard bezel and speaker” on page 76

For A20m/p and A21m/p series (microphone
and speaker cable)

When installing: Make sure that you fasten the connector
firmly.
(continued)

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Removing and replacing a FRU

For A22m/p series (speaker cable)

When installing: Make sure that you fasten the connector
firmly.

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Removing and replacing a FRU

1120 Sub card
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71
v “1080 Keyboard CRU insulator” on page 74
v “1090 Hinge cover and clear sheet icon” on page 75
v “1100 Keyboard bezel and speaker” on page 76

Step

Screw (quantity)

Torque


1

M2.6 × 2.8 mm, nylon-coated (2)

0.392 Nm
(4 kgfcm)

(continued)

80

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

Step

Screw (quantity)

Torque


4

M2.5 × 4.8 mm, nylon-coated (1)

0.392 Nm
(4 kgfcm)

ThinkPad A20m/p, A21m/p and A22m/p

81

Removing and replacing a FRU

1130 PC Card slot assembly
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71
v “1080 Keyboard CRU insulator” on page 74
v “1090 Hinge cover and clear sheet icon” on page 75
v “1100 Keyboard bezel and speaker” on page 76
v “1120 Sub card” on page 80
Note: Step 
1 (PC Card slot spacer) is only for MT2629.
Other model do not have the spacer. Remove it
gently; it will be reused when installing new PC
Card slot assembly.

Step

Screw (quantity)

Torque


2

M2.0 × 9.5 mm, nylon-coated (2)

0.245 Nm
(2.5 kgfcm)

82

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

1140 Fan assembly
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71
v “1080 Keyboard CRU insulator” on page 74
v “1090 Hinge cover and clear sheet icon” on page 75
v “1100 Keyboard bezel and speaker” on page 76
Note: Step 
1a is for the MT2628-Fxx, Gxx, Pxx, Qxx,
Rxx, Sxx, Txx, Xxx, MT2633-Gxx, Txx, and
MT2629. Other model do not have the screw 
1a.

Step

Screw (quantity)

Torque


1a

M2.5 × 4.8 mm, nylon-coated (2)

0.392 Nm
(4 kgfcm)


1

M2.5 × 4.8 mm, nylon-coated (3)

0.392 Nm
(4 kgfcm)

ThinkPad A20m/p, A21m/p and A22m/p

83

Removing and replacing a FRU

Installation notice for A21m/p and A22m/p series
When installing the fan assembly, apply the thermal grease
(05K5751) on the 
a-part of the fan as shown in the
following figure.

84

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

1150 Diskette drive
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71
v “1080 Keyboard CRU insulator” on page 74
v “1090 Hinge cover and clear sheet icon” on page 75
v “1100 Keyboard bezel and speaker” on page 76
v “1110 Microphone and speaker cable” on page 78
Note: Step 
1a are for the MT2628-Fxx, Gxx, Pxx, Qxx,
Rxx, Sxx, Txx, Xxx, MT2633-Gxx, Txx, and
MT2629. Other model do not have the screws 
1a.

Step

Screw (quantity)

Torque


1a

M2.5 × 4.8 mm, nylon-coated (3)

0.392 Nm
(4 kgfcm)

(continued)

ThinkPad A20m/p, A21m/p and A22m/p

85

Removing and replacing a FRU

Notes:
1. The heatpipe A and the screw 
1a are for the
MT2628-Fxx, Gxx, Pxx, Qxx, Rxx, Sxx, Txx, Xxx,
MT2633-Gxx, Txx, and MT2629. Other models do not
have them.
2. Step 
4 (diskette drive spacer) is only for MT2629.
Other models do not have the spacer. Remove it
gently; it will be reused when installing new diskette
drive.
Step

Screw (quantity)

Torque


1a

M2.5 × 4.8 mm, nylon-coated (1)

0.392 Nm
(4 kgfcm)


1

M2.5 × 4.8 mm, nylon-coated (1)

0.392 Nm
(4 kgfcm)


2

M2.5 × 15 mm, nylon-coated (2)

0.392 Nm
(4 kgfcm)

When installing: Do not press the 
a-part of the diskette
drive to avoid the damage.

86

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

1160 Upper shield
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71
v “1080 Keyboard CRU insulator” on page 74
v “1090 Hinge cover and clear sheet icon” on page 75
v “1100 Keyboard bezel and speaker” on page 76
v “1110 Microphone and speaker cable” on page 78
v “1120 Sub card” on page 80
v “1130 PC Card slot assembly” on page 82
v “1140 Fan assembly” on page 83
v “1150 Diskette drive” on page 85

Step

Screw (quantity)

Torque


1

M2.5 × 15 mm, nylon-coated (2)

0.392 Nm
(4 kgfcm)


2

M2.5 × 4.8 mm, nylon-coated (2)

0.392 Nm
(4 kgfcm)

ThinkPad A20m/p, A21m/p and A22m/p

87

Removing and replacing a FRU

1170 TV card
Note
This section is only for MT2628-Fxx,-Gxx, -Sxx,-Txx,
MT2633-Gxx,-Txx, and MT2629. Other models do
not have the TV card.
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71
v “1080 Keyboard CRU insulator” on page 74
v “1090 Hinge cover and clear sheet icon” on page 75
v “1100 Keyboard bezel and speaker” on page 76
v “1110 Microphone and speaker cable” on page 78
v “1120 Sub card” on page 80
v “1130 PC Card slot assembly” on page 82
v “1140 Fan assembly” on page 83
v “1150 Diskette drive” on page 85
v “1160 Upper shield” on page 87

Cable routing: When replacing the modem cable, see the
figure for the cable routing.

88

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

1180 CPU socket and CPU
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1020 DIMM” on page 61
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71
v “1080 Keyboard CRU insulator” on page 74
v “1090 Hinge cover and clear sheet icon” on page 75
v “1100 Keyboard bezel and speaker” on page 76
v “1110 Microphone and speaker cable” on page 78
v “1120 Sub card” on page 80
v “1130 PC Card slot assembly” on page 82
v “1140 Fan assembly” on page 83
v “1150 Diskette drive” on page 85
v “1160 Upper shield” on page 87
Note: MT2628-Exx, -Dxx do not have the CPU removal
procedure.

Rotate the screw head (A) 180° to the direction of the
arrow 
a to release the lock and then remove the CPU.
Step

Screw (quantity)

Torque


1

M2.5 × 15 mm, nylon-coated (3)

0.392 Nm
(4 kgfcm)

ThinkPad A20m/p, A21m/p and A22m/p

89

Removing and replacing a FRU

When installing the CPU, do as shown in the figure.
v Rotate the screw head (A) 180° to the direction of the
arrow 
b to lock the CPU.
v When attach the CPU to the socket, do as shown in the
step 
c.

90

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

1190 System board and RJ45/11
connector assembly
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1020 DIMM” on page 61
v “1030 Mini PCI adapter” on page 63
v “1040 Backup battery” on page 66
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71
v “1080 Keyboard CRU insulator” on page 74
v “1090 Hinge cover and clear sheet icon” on page 75
v “1100 Keyboard bezel and speaker” on page 76
v “1110 Microphone and speaker cable” on page 78
v “1120 Sub card” on page 80
v “1130 PC Card slot assembly” on page 82
v “1140 Fan assembly” on page 83
v “1150 Diskette drive” on page 85
v “1160 Upper shield” on page 87
v “1170 TV card” on page 88
v “1180 CPU socket and CPU” on page 89

Step

Screw (quantity)

Torque


1

M2.5 × 4.8 mm, nylon-coated (2)

0.392 Nm
(4 kgfcm)

(continued)

ThinkPad A20m/p, A21m/p and A22m/p

91

Removing and replacing a FRU

Note: Step 
4 (thermal rubbers) are only for
MT2628-Pxx, -Qxx, -Rxx, -Sxx, -Txx, -Xxx, and
MT2629-Hxx, -Uxx. When replacing the system
board for those models, remove the thermal rubbers
from the removed system board and put them onto
the new system board. And then install the new
system board to the base cover. (For the location of
the therma rubbers, see “Thermal rubbers location”
on page 93.)

For A20m/p and A21m/p series

For A22m/p series

Note: When installing the new RJ45/11 connector
assembly onto the system board, make sure that
the connector is firmly attached.

92

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

Thermal rubbers location
Before installing the new system board, make sure that the
thermal rubbers are placed on the system board as shown
in the following figures.
For A21m/p series
Upper side of the system board

Bottom side of the system board

For A22m/p series
Upper side of the system board

ThinkPad A20m/p, A21m/p and A22m/p

93

Removing and replacing a FRU

2010 LCD assembly
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71
v “1080 Keyboard CRU insulator” on page 74
v “1090 Hinge cover and clear sheet icon” on page 75
v “1100 Keyboard bezel and speaker” on page 76
Note: Screws 
1a are for MT2628-Fxx, -Gxx, -Pxx, -Qxx,
-Rxx, -Sxx, -Txx, -Xxx, MT2633-Gxx, -Txx and
MT2629. Other models do not have them.

Step

Screw (quantity)

Torque


1a

M2.5 × 4.8 mm, nylon-coated (3)

0.392 Nm
(4 kgfcm)


1

M2.5 × 4.8 mm, nylon-coated (4)

0.392 Nm
(4 kgfcm)

(continued)

94

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

Step

Screw (quantity)

Torque


2

M2.6 × 2.8 mm, nylon-coated (2)

0.392 Nm
(4 kgfcm)


4

M2.5 × 4.8 mm, nylon-coated (2)

0.392 Nm
(4 kgfcm)

ThinkPad A20m/p, A21m/p and A22m/p

95

Removing and replacing a FRU

2020 Front bezel
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71
v “1080 Keyboard CRU insulator” on page 74
v “1090 Hinge cover and clear sheet icon” on page 75
v “1100 Keyboard bezel and speaker” on page 76
v “2010 LCD assembly” on page 94

12.1-in. panel

Step

Screw (quantity)

Torque


1

M2.5 × 4.8 mm, nylon-coated (3)

0.392 Nm
(4 kgfcm)

96

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

14.1-in. and 15.0-in. panels

Step

Screw (quantity)

Torque


1

M2.5 × 4.8 mm, nylon-coated (2)

0.392 Nm
(4 kgfcm)

ThinkPad A20m/p, A21m/p and A22m/p

97

Removing and replacing a FRU

Note: Only the front bezel for the 15.0-in. XGA TFT (LG)
has a identifying mark (V), as in the following
figure. For the FRU list, see “15.0-in. XGA TFT
(LG)” on page 138.

98

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

2030 Inverter card
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71
v “1080 Keyboard CRU insulator” on page 74
v “1090 Hinge cover and clear sheet icon” on page 75
v “1100 Keyboard bezel and speaker” on page 76
v “2010 LCD assembly” on page 94
v “2020 Front bezel” on page 96

12.1-in. panel

Step

Screw (quantity)

Torque


1

M2.5 × 4.8 mm, nylon-coated (1)

0.392 Nm
(4 kgfcm)

(continued)

ThinkPad A20m/p, A21m/p and A22m/p

99

Removing and replacing a FRU

14.1-in. and 15.0-in. panels

Step

Screw (quantity)

Torque


1

M2.5 × 4.8 mm, nylon-coated (1)

0.392 Nm
(4 kgfcm)

100

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

2040 LCD panel
For access, remove these FRUs, in order:
v “1010 Battery pack” on page 60
v “1050 Hard-disk drive or RF ID adapter” on page 67
v “1060 Ultrabay 2000 device” on page 69
v “1070 Keyboard” on page 71
v “1080 Keyboard CRU insulator” on page 74
v “1090 Hinge cover and clear sheet icon” on page 75
v “1100 Keyboard bezel and speaker” on page 76
v “2010 LCD assembly” on page 94
v “2020 Front bezel” on page 96
v “2030 Inverter card” on page 99

12.1-in. panel

Step

MT

Screw (quantity)

Torque


1

2628-Dxx, Qxx,
1xx, 2xx

M2.5 × 7.0 mm,
nylon-coated (4)

0.392 Nm
(4 kgfcm)

(continued)

ThinkPad A20m/p, A21m/p and A22m/p

101

Removing and replacing a FRU

(continued)

102

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

14.1-in. and 15.0-in. panels

Step

MT

Screw (quantity)

Torque


1

2628-Fxx, Pxx,
Rxx, 3xx

M2 × 5.7 mm,
nylon-coated (4)

0.245 Nm
(2.5 kgfcm)

2628-Exx, Gxx,
M2 × 5.7 mm,
Xxx, Txx and
nylon-coated (4)
2633-Gxx, Txx, 4xx

0.167 Nm
(1.7 kgfcm)

2628-Sxx and
2629

0.196 Nm
(2.0 kgfcm)

M2 × 5.1 mm,
nylon-coated (4)

(continued)

ThinkPad A20m/p, A21m/p and A22m/p

103

Removing and replacing a FRU

v For the 14-in. LCD, the LCD cable is taped onto the
connector. Tear off the tape before disconnecting the
LCD cable in step 
4.
v The LCD cable for the 15.0-in. UXGA LCD (27L0598)
and the LCD cable for the 15.0-in. SXGA+ LCD
(27L0488) have the UltraPort connector and need step

6. If the UltraPort adapter has been screwed onto the
LCD, remove the adapter before step 
6. To do this,
remove the screws from both sides of the adapter as
shown in the figure 
2a. For other cable, do as shown
in the figure 
2b.

104

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

3010 ThinkPad Dock PCI cover
Before replacing the PCI cover:
There are two types of ThinkPad Dock as follows:
v ThinkPad Dock: FRU part no. 08N1546 (PCI cover: FRU
part no. 05K6246)

v ThinkPad Dock with extension plate: FRU part no.
08N1537 (PCI cover: FRU part no. 08N7317)

Make sure that the PCI cover FRU suits the ThinkPad
Dock you are servicing.

ThinkPad A20m/p, A21m/p and A22m/p

105

Removing and replacing a FRU

Note: Following illustration shows the PCI cover removal
of ThinkPad Dock (FRU no. 08N1546.) Do the
same procedure for the PCI cover removal of
ThinkPad Dock with extension plate (FRU part no.
08N1537.)

1
1
2

(Bottom view)

106

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

3020 ThinkPad Dock top cover
Note
This section is only for the ThinkPad Dock (FRU no.
08N1546.) Top cover and screw kit for ThinkPad
Dock (FRU part no. 12P4143) is not available for
the ThinkPad Dock with extension plate (FRU part
no. 08N1537.)

1

(Rear view)
Step

Screw (quantity)

Torque


1

M2.5 × 4.8 mm (2)

0.392 Nm
(4 kgfcm)

(continued)

ThinkPad A20m/p, A21m/p and A22m/p

107

Removing and replacing a FRU

2

2
2

(Bottom view)
Step

Screw (quantity)

Torque


2

M2.5 × 4.8 mm (8)

0.392 Nm
(4 kgfcm)

(continued)

108

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

Make sure that the system lock key A is set to the Unlock
position. Release the front latches in step 
3, and then
remove the top cover 
4. For step 
5, see the inside
view, shown in the circle.

4

3

5

A

ThinkPad A20m/p, A21m/p and A22m/p

109

Removing and replacing a FRU

When replacing the top cover, do the following:
v Make sure that the springs placed correctly.

v Make sure that the device release lever is seated
correctly.

(continued)

110

ThinkPad A20m/p, A21m/p, A22m/p

Removing and replacing a FRU

v Make sure that the release button works correctly.

ThinkPad A20m/p, A21m/p and A22m/p

111

Locations

Locations
Front view

1

2

3

4

5

6

7

8

System status indicators
Battery and standby mode status indicators
Built-in stereo speakers
PC Card eject button
PC Card slots
Bay latch
Eject button
Ultrabay 2000 device


9

10

11

12

13

14

15

Note: The Ultrabay 2000 accepts storage
devices, such as a DVD drive or a
CD-ROM drive.
Video-out connector
Video-in connector
TrackPoint pointing stick
TrackPoint buttons
ThinkPad button
Volume and mute buttons
Power switch

13

14

1

15

2

3

12

11

10

112

9

8

7

6

5

ThinkPad A20m/p, A21m/p, A22m/p

4

Locations

Rear view

1

2

3

4

5

6

7

8

9

Security keyhole
Parallel connector
Modem connector
Network connector
Serial connector
External-monitor connector
Universal serial bus (USB) connector
External-input-device connector
Power jack

ThinkPad A20m/p, A21m/p and A22m/p

113

Locations

Bottom view

1

2

3

4

5

6

7

8

9

10

11

12

114

Battery pack
Battery pack latches
Mini PCI card slot
Docking connector
DIMM slot
Stereo headphone jack
Stereo line-in jack
Diskette drive
Microphone jack
Infrared port
Hard-disk drive
LCD latches

ThinkPad A20m/p, A21m/p, A22m/p

Parts list

Parts list
A series model matrix
The A series includes several models. The following table
summarizes the characteristics of each model, to help you
determine which FRU in the part list meets your need.
Model

CPU

Bay
device

Mini PCI LCD
adapter

HDD

A20m (Memory, 64 MB; Video memory, 4 MB)
2628-11x except
11J, 11K
2628-12x except
12J, 12K

Cel
500

CDROM

Modem

2628-11J, 11K,
12J, 12K

Ethernet

2628-14x, 1Rx,
1Sx, 1Tx

Combo
(Intel)

12.1-in.
SVGA

6 GB

2628-1Ox

—

—

—

2628-1Ax except Cel
1AJ, 1AK
550
2628-1Cx except
1CJ, 1CK

CDROM

Modem

6 GB

2628-1AJ, 1AK,
1CJ, 1CK

Ethernet

2628-1Ux, 1Vx

Combo
(Intel)

2628-1Zx
2628-21x except
21J, 21K
2628-22x except
22J, 22K

CM
500

—

—

—

CDROM

Modem

6 GB

2628-21J 21K,
22J, 22K

Ethernet

2628-24x, 2Sx,
2Tx

Combo
(Intel)

2628-2Ox

—

—

—

(continued)

ThinkPad A20m/p, A21m/p and A22m/p

115

Parts list
Model

CPU

Bay
device

Mini PCI LCD
adapter

HDD

A20m (Memory, 64 MB; Video memory, 8 MB)
2628-31x
except 31J, 31K
2628-32x
except 32J, 32K

Cel
500

CDROM

Modem

2628-31J, 31K,
32J, 32K

Ethernet

2628-3Sx, 3Tx

Combo
(Intel)

2628-3Ax
except 3AJ
2628-3Cx
except 3CJ

Cel
550

12 GB

Modem

2628-3AJ, 3CJ

Ethernet

2628-3Ux, 3Vx

Combo
(Intel)

2628-3Zx

15.0-in.
XGA

—

—

—

CM
700G

DVDROM

Modem

18 GB

2628-47x, 48x

Cel
500

CDROM

Modem

2628-4Ax
except 4AK
2628-4Cx
except 4CK

CM
600G

DVDROM

Modem

2628-3Jx, 3Kx
*1

2628-4AK, 4CK

Ethernet

2628-4Ux, 4Vx

Combo
(Intel)

2628-4Zx
2628-4Dx, 4Ex

CM
650G

2628-4Fx, 4Gx
2628-41x
except 41J, 41K
2628-42x
except 42J, 42K
2628-44x
except 44J, 44K

CM
700G

14.1-in.
XGA

—

—

—

CDROM

Modem

12 GB

DVDROM

Modem

CDROM

Modem

2628-41J, 41K,
42J, 42K, 44J,
44K

Ehternet

2628-43x, 45x

—

*1: Memory 128 MB
(continued)

116

12 GB

ThinkPad A20m/p, A21m/p, A22m/p

Parts list
Model

CPU

Bay
device

Mini PCI LCD
adapter

HDD

A20m (Memory, 64 MB; Video memory, 8 MB)
2628-4Lx

*1

CM
700G

2628-4Sx, 4Tx

CDROM

Modem
Combo
(Intel)

14.1-in.
XGA

12 GB

2628-4Ox

—

—

—

2628-4Wx, 4Xx

CDROM

Combo
(3Com)

12 GB

*1

DVDROM

Modem

18 GB

2633-41x
except 41J, 41K
42x except 42J,
42K

CDROM

Modem

12 GB

2628-4Hx, 4Ix

2633-41J, 41K,
42J, 42K

Ethernet

2633-43x, 45x

—

2633-4Sx, 4Tx

Combo
(Intel)

2633-4Wx, 4Xx

Combo
(3Com)

A20p (Memory, 128 MB; Video memory, 16 MB)
2629-61x
except 61J, 61K
2629-62x
except 62J, 62K

CM
700G

DVDROM

Modem

2629-61J, 61K,
62J, 62K

Ehternet

2629-6Sx, 6Tx

Combo
(Intel)

2629-6Ox
2629-6Ax
except 6AJ,
6AK
2629-6Cx
except 6CJ,
6CK

CM
750G

18 GB

—

—

—

DVDROM

Modem

20 GB

2629-6AJ, 6AK,
6CJ, 6CK

Ethernet

2629-6Ux, 6Vx

Combo
(Intel)

2629-6Zx

15.0-in.
SXGA+

—

—

—

*1: Memory 128 MB
(continued)

ThinkPad A20m/p, A21m/p and A22m/p

117

Parts list
Model

CPU

Bay
device

Mini PCI LCD
adapter

HDD

A21m (Memory, 64 MB; Video memory, 4 MB)
2628-C1x, C2x
2628-C4x

Cel
600

CDROM

2628-CXx, CYx

2628-D4x

Combo
(Intel)

CM
700G

—

—

CDROM

Modem

10 GB

Combo
(Intel)
Combo
(3Com)

2628-DOx

—

—

2628-EDx, EEx

CDROM

Modem

2628-E1x, E2x

DVDROM

2628-ESx, ETx
2628-EXx, EWx

—
14.1-in.
XGA

10 GB

Combo
(Intel)
Combo
(3Com)

2628-EFx, EGx

Modem

2628-EOx
Cel
700

—

—

CDROM

Modem

2628-JAJ, JCJ

Ethernet

2628-JUx
except JUY
2628-JVx

Combo
(Intel)

2628-JUY

Combo
(3Com)

20 GB
—
15.0-in.
XGA

(continued)

118

10 GB

—

2628-DXx, DWx

2628-JAx
except JAJ
2628-JCx
except JCJ

12.1-in.
SVGA

Combo
(3Com)

2628-COx
2628-D1x, D2x

Modem

ThinkPad A20m/p, A21m/p, A22m/p

20 GB

Parts list
Model

CPU

Bay
device

Mini PCI LCD
adapter

HDD

A21m (Memory, 64 MB; Video memory, 8 MB)
2628-F1x, F2x
except F2J

CM
750G

CDROM

Modem

2628-F2J

Ethernet

2628-FXx, FWx

Combo
(3Com)

2628-FSx, FTx

Combo
(Intel)

2628-FOx
2628-FDC

*1

CM
800G

2628-G1x
except G1J
2628-G2x
except G2J
2628-G4x
except G4J
2628-GLx

15.0-in.
XGA

20 GB

—

—

—

DVDROM

Modem

20 GB

DVDROM

Modem

14.1-in.
XGA

*1

2628-G1J, G2J,
G4J

Ethernet

2628-G3x, G5x

—

2628-GSx, GTx

Combo
(Intel)

2628-GXx, GWx

Combo
(3Com)

2628-GOx

—

—

—

2633-G1x
except G1J,
G1K
2633-G2x
except G2J,
G2K

DVDROM

Modem

20 GB

2633-G1J, G1K,
G2J, G2K

Ethernet

2633-GSx, GTx

Combo
(Intel)

2633-GXx, GWx

Combo
(3Com)

*1: Memory 128 MB
(continued)

ThinkPad A20m/p, A21m/p and A22m/p

119

Parts list
Model

CPU

Bay
device

Mini PCI LCD
adapter

HDD

A21p (Memory, 128 MB; Video memory, 16 MB)
2629-H1x, H2x
except H2J

CM
850G

DVDROM

Modem

2629-H2J

Ehternet

2629-HSx, HTx

Combo
(Intel)

2629-HXx, HWx

Combo
(3Com)

2629-HOx

—

15.0-in.
UXGA

—

32 GB

—

A22m (Memory, 64 MB; Video memory, 4 MB)
2628-P1x
except P1J
2628-P2x
except P2J

CM
800G

CDROM

Modem

2628-P1J, P2J

Ethernet

2628-PSx, PTx,
PQH, PRA

Combo
(Intel)

2628-Q1x
except Q1J
2628-Q2x
except Q2J

Modem

2628-Q1J, Q2J

Ethernet

2628-QSx, QTx

Combo
(Intel)

2628-QQx,
QRx, QUx, QVx
2628-XxG

CM
850G

DVDROM

2628-R1x
except R1J
2628-R2x
except R2J

CM
850G

DVDROM

2628-R1J, R2J

15.0-in.
XGA

10 GB

12.1-in.
SVGA

20 GB

14.1-in.
XGA
Modem

15.0-in.
XGA

Ethernet

2628-RAC

CDROM

Modem

2628-RSx, RTx,
RQA

DVDROM

Combo
(Intel)

(continued)

120

ThinkPad A20m/p, A21m/p, A22m/p

Parts list
Model

CPU

Bay
device

Mini PCI LCD
adapter

HDD

A22m (Memory, 64 MB; Video memory, 8 MB)
2628-S1x
excepting S1J
2628-S2x
excepting S2J

CM
900G

2628-S1J, S2J
2628-SAC

DVDROM

Modem

15.0-in.
SXGA+

20 GB

14.1-in.
XGA

30 GB

Ethernet

*1

Modem

2628-SSx, STx
2628-T1x
excepting T1J
2628-T2x
excepting T2J

Combo
(Intel)
CM
1KG

Modem

*1

2628-T7x, T8x,
TMx, TNx
2628-T1J, T2J

Ethernet

*1

2628-T3x, T5x

—

*1

2628-TSx, TTx,
TUx *1

Combo
(Intel)

2628-TQx, TRx,
TUx, TVx *1
2628-TXx, TWx
*1

Combo
(3Com)

2633-T1x
excepting T1J,
T1K
2633-T2x
excepting T2J,
T2K *1

Modem

2633-T1J, T1K,
T2J, T2K *1

Ethernet

2633-T3x, T5x

—

*1

2633-TSx, TTx
*1

2633-TXx, TWx
*1

Combo
(Intel)
Combo
(3Com)

*1: Memory 128 MB
(continued)

ThinkPad A20m/p, A21m/p and A22m/p

121

Parts list
Model

CPU

Bay
device

Mini PCI LCD
adapter

HDD

A22p (Memory, 128 MB; Video memory, 16 MB)
2629-Y1x
except Y1J
2629-Y2x
except Y2J

CM
900G

CD-R/W Modem

2629-Y1J, Y2J

2629-YUx, YVx

DVDROM
CM
1KG

Combo
(Intel)

CD-R/W Modem

2629-U1J, U2J

Ethernet

2629-USx, UTx

Combo
(Intel)

2629-UQx, URx,
UUx, UVx
CMxxx:

32 GB

Ethernet

2629-YSx, YTx

2629-U1x
except U1J
2629-U2x
except U2J

15.0-in.
UXGA

Mobile Intel® Pentium® III processor xxx MHz, L2
256-KB cache

CM xxxG:
Mobile Intel® Pentium® III processor at xxx MHz
featuring Intel® SpeedStep™ technology
CMG xKG:

Celxxx:

122

Mobile Intel® Pentium® III processor at x GHz
featuring Intel® SpeedStep™ technology
Intel® Celeron® processor xxx MHz, L2 256-KB cache

ThinkPad A20m/p, A21m/p, A22m/p

Parts list

Overall
1

31
2

30

29

3

28b
4

28a

5
6

27

7

26

8
25

9

24
22

a

23

10

21
23

20
19

11
32

12

33
14

13

15
18
17
16

ThinkPad A20m/p, A21m/p and A22m/p

123

Parts list

v Each FRU is available for all types/models, unless
specific types or models are given.
v The FRUs marked with asterisk are CRUs (customer
replacable units).
v The FRUs marked with 
OP are also available as
optional FRUs.
No.

FRU

a

See “Miscellaneous parts” on page 145.

1

LCD unit (see “LCD FRUs” on page 136)

2

P/N

Hinge cover (for A20m/A20p)
12.1/14.1-in. LCD models
2628-1xx, 2xx, 4xx, Bxx, 2633-all

04P3970

15.0-in. LCD models
2628-3xx

04P3972

15.0-in. LCD with heatpipe models
2629-all

04P3971

Hinge cover (for A21m/A21p)
12.1/14.1-in. LCD models
2628-Cxx, Dxx, Exx

04P3970

15.0-in. LCD models
2628-Jxx

04P3972

12.1/14.1-in. LCD with heatpipe models
2628-Gxx, 2633-Gxx

04P3490

15.0-in. LCD with heatpipe models
2628-Fxx

04P3971

15.0-in. LCD with heatpipe models
2629-Hxx

08K0863

Hinge cover (for A22m/A22p)

3

12.1/14.1-in. LCD with heatpipe models
2628-Qxx, Txx, Xxx, 2633-Txx

08K7301

15.0-in. LCD with heatpipe models
2628-Pxx, Rxx, Sxx, 2629-Uxx, Yxx

08K7302

Speaker assembly
12.1/14.1-in. LCD models
2628-1xx, 2xx, 4xx, Bxx, Cxx, Dxx, Exx,
Gxx, Kxx, Qxx, Txx, Xxx
2633-4xx, Gxx, Txx

02K5007

15.0-in. LCD models
2628-3xx, Fxx, Jxx, Pxx, Rxx, Sxx
2629-6xx, Hxx, Uxx, Yxx

02K5644

(continued)

124

ThinkPad A20m/p, A21m/p, A22m/p

Parts list
No.
4

FRU

P/N

Keyboard bezel for 12.1/14.1-in. LCD models
2628-1xx, 2xx, 4xx, Dxx, Exx, Gxx, Qxx,
Txx except xxK
2628-Bxx, Xxx
2633-4xx, Gxx, Txx except xxK

08K5667

2628-1xK, 2xK, 4xK, DxK, ExK, GxK, QxK, 08K5669
TxK
2633-4xK, GxK, TxK
Keyboard bezel for 12.1/14.1-in. LCD (1 slot) models
2628-Cxx except CxK

04P3726

2628-CxK

08K7090

Keyboard bezel for 15.0-in. LCD models
2628-3xx, Fxx, Pxx, Rxx, Sxx except xxK
2629-6xx, Hxx, Uxx , Yxx except xxK

08K7162

2628-3xK, FxK, PxK, RxK, SxK
2629-6xK, HxK, UxK

08K7163

Keyboard bezel for 15.0-in. LCD (1slot) models
2628-Jxx except JxK

08K7164

2628-JxK

08K7165

5

Heatpipe hinge (lower)
2628-Fxx, Gxx, Pxx, Qxx, Rxx, Sxx, Txx
2629-6xx, Fxx, Gxx, Hxx, Uxx, Yxx
2633-Gxx, Txx

08K7287

6

Spacer, PC card slots
2629-6xx, Hxx, Uxx, Yxx

04P3223

7

Sub card

8

9

for A20m, A20p

10L1418

for A21m, A22m except 2628-Sxx

08K3306

for 2628-Sxx, A21p, A22p

08K3261

PC card slots (2 slots)
all models except 2628-Cxx, Jxx

04P3523

PC card slot (1 slot)
2628-Cxx, Jxx

04P3398

Fan assembly
2628-1xx, 2xx, 47x, 48x, Bxx
2628-3xx except 3JC, 3KC

08K5650

2628-4xx except 47x, 48x
2628-3JC, 3KC
2633-4xx
2629-6xx

08K6614

(continued)

ThinkPad A20m/p, A21m/p and A22m/p

125

Parts list
No.
9

FRU

2628-Cxx, Dxx, Exx, Jxx

04P3482

2628-Fxx, Gxx, Pxx, Qxx, Rxx
2633-Gxx
2629-Fxx, Gxx, Hxx

04P3483

2628-Sxx, Txx, 2629-Uxx, 2633-Txx
10

P/N

Fan assembly

26P9207

TV card (out only)
2628-Fxx, Gxx, Sxx, Txx, Xxx
2633-Gxx, Txx

08K3259

TV card (in/out)
2629-6xx, Hxx, Uxx

10L1419

11

Backup battery

02K6572

12

Mini PCI adapter
Mini PCI combo card (Intel) for A20m/p,
A21m/p 
OP
2628-14U, 14F, 1Sx, 1Tx, 24U, 24F, 2Sx,
2Tx, 3Sx, 3Tx, 4Sx, 4Tx
2628-1Ux, 1Vx, 3Ux, 3Vx, 4Ux, 4Vx
2628-xxJ, xxK
2629-6Sx, 6Tx, 6Ux, 6Vx
2629-xxJ, xxK
2633-4Sx, 4Tx
2633-xxJ, xxK

08K3125*

Mini PCI combo card (Intel) for A22m/p 
OP
2628-xSx, xTx
2629-xSx, xTx
2633-xSx, xTx

06P3809*

Mini PCI combo card (3Com) for A20m, A21m

OP
2628-4Wx, 4Xx, GWx, GXx
2633-4Wx, 4Xx, GWx, GXx

00N8117*

Mini PCI combo card (3Com) for A22m 
OP
2628-xXx, xWx
2633-xXx, xWx

22P6753*

Mini PCI combo card (CR) for A21m/p 
OP
2628-all except xxJ, xxK
2629-all except xxJ, xxK
2633-all except xxJ, xxK

19K5888*

(continued)

126

ThinkPad A20m/p, A21m/p, A22m/p

Parts list
No.
12

FRU

P/N

Mini PCI adapter
Mini PCI modem card (Ambit) for A20m/p,
A21m/p
2628-11x, 12x, 21x, 22x, 31x, 32x, 41x,
42x, 44x, 47x, 48x, 4Dx, 4Ex, 4Fx, 4Gx,
4Hx, 4Ix, Bxx except xxJ, xxK, xxA
2628-1Ax, 1Cx, 3Ax, 3Cx, 4Ax, 4Cx, 4Lx
except xxA, xxJ, xxK
2628-Cxx, Dxx, Exx, Fxx, Gxx except xxA
2628-3JC, 3KC
2628-JAx, JCx except xxA
2629-61x, 62x except xxA, xxJ, xxK
2629-Hxx except xxA
2633-41x, 42x except xxA, xxJ, xxK
2633-Gxx except xxA

08K3252

Mini PCI modem card (Ambit) for A22m/p
2628-x1x, x2x except xxJ, xxK
2629-U1x, U2x except xxJ, xxK
2633-x1x, x2x except xxJ, xxK

08K3383

Mini PCI modem card (M2) (IBM) for A20m/p
2628-11A, 12A, 1AA, 1CA, 21A, 22A, 31A,
32A, 3AA, 3CA, 41A, 42A, 44A, 47A, 48A,
4AA, 4CA, 4LA, 4DA, 4EA, 4FA, 4GA,
4HA, 4IA
2629-61A, 62A
2633-41A, 42A

08K3429

Mini PCI modem card (IBM CR) for A21m/p
2628-xxA
2629-xxA
2633-xxA

08K3338

Mini PCI Ethernet card (Intel) 2.6 for A20m/p
2628-xxJ, xxK except 43x, 45x
2629-xxJ, xxK
2633-41J, 41K, 42J, 42K

10L1423

Mini PCI Ethernet card (Intel) 3.0
for A21m/p
2628-xxJ, xxK
2629-xxJ, xxK
2633-xxJ, xxK

08K3348

for A22m/p
2628-x1J, x1K, x2J, x2K
2629-U1J, U1K, U2J, x2K
2633-x1J, x1K, x2J, x2K

(continued)

ThinkPad A20m/p, A21m/p and A22m/p

127

Parts list
No.
13

FRU

P/N

Base cover for A20m
2628-1xx, 2xx, 3xx, 4xx except xxK, xxT,
2628-Bxx

04P3410

2628-1xK, 2xK, 3xK, 4xK

04P3412

2628-1xT, 2xT, 3xT, 4xT

04P3411

2633-4xx except 4xK, 4xT

08K5901

2633-4xK

08K5904

2633-4xT

08K5902

Base cover for A20p
2629-6xx except 6xK, 6xT

08K5640

2629-6xK

08K5646

2629-6xT

08K5642

Base cover for A21m
2628-Dxx, Exx, Fxx, Gxx except xxK, xxT 04P3711
2628-Jxx except JxK, JxT

04P3712

2628-DxK, ExK, FxK, GxK

04P3719

2628-JxK

04P3720

2628-DxT, ExT, FxT, GxT

04P3715

2628-JxT

04P3716

2633-Gxx except GxK, GxT

04P3714

2633-GxK

04P3722

2633-GxT

04P3718

Base cover for A21p
2629-Hxx except HxK, HxT

04P3713

2629-HxK

04P3721

2629-HxT

04P3717

Base cover for A22m
2628-Pxx, Qxx, Rxx, Sxx, Txx except
xxK, xxT

26P9523

2628-PxK, QxK, RxK, SxK

26P9529

2628-PxT, QxT, RxT, SxT

26P9529

2633-Txx except TxK, TxT

26P9525

2633-TxK

26P9531

2633-TxT

26P9528

Base cover for A22p
2629-Uxx except UxK, UxT

26P9524

2629-UxK

26P9530

2629-UxT

26P9527

(continued)

128

ThinkPad A20m/p, A21m/p, A22m/p

Parts list
No.

FRU

P/N

14

Blank cap RJ45
2628-x1x, x2x, x4x except xxJ, xxK
2628-xAx, xCx except xxJ, xxK
2628-3JC, 3KC, 4Lx
2628-47G, 48G, 4DC, 4EC, 4FC, 4GC,
4HC, 4IC
2628-xSx, xTx, xWx, xXx, x1J, x1K, x2J,
x2K
2629-x1x, x2x, x4x except xxJ, xxK
2629-xAx, xCx except xxJ, xxK
2629-USx, UTx, U1J, U1K, U2J, U2K
2633-x1x, x2x, x4x except xxJ, xxK
2633-xSx, xTx, xWx, xXx, x1J, x1K, x2J,
x2K

04P3975

15

Ultrabay 2000 device
CD-ROM drive (TOSHIBA) 
OP
2628-1xx except 10U, 1ZU
2628-2xx except 20U
2628-3xx except 30U, 3JC, 3KC, 3ZU
2628-4xx except 40U
2628-Bxx
2633-4xx

05K9158

CD-ROM drive (LG) 
OP
2628-1xx except 10U, 1ZU
2628-2xx except 20U
2628-3xx except 30U, 3JC, 3KC, 3ZU
2628-4xx except 40U
2628-Bxx
2628-Cxx, Dxx, Fxx, Jxx
2633-4xx

05K9159

CD-ROM drive (LG) 
OP
2628-Bxx
2628-Pxx, Qxx, RAx
2633-4xx

08K9545

CD-ROM drive (TEAC) 
OP
2628-Bxx
2628-Cxx, Dxx, Fxx, Jxx
2628-Pxx, Qxx, RAx
2633-4xx

27L3436

DVD-ROM drive (MKE) 
OP
2628-4Ax, 4Cx, 4Ux, 4Vx, 3JC, 3KC
2628-6xx except 6ZU
2629-6xx except 60U

05K9188

DVD-ROM drive (TOSHIBA) 
OP
2628-4Ax, 4Cx, 4Ux, 4Vx, 3JC, 3KC
2628-6xx except 6ZU
2629-6xx except 60U

05K9160

(continued)

ThinkPad A20m/p, A21m/p and A22m/p

129

Parts list
No.
15

FRU

P/N

Ultrabay 2000 device
DVD-ROM drive 8x (MKE) 
OP
2628-Exx, Gxx
2628-Rxx except RAx, Sxx, Txx, Xxx
2629-Exx, Gxx, Hxx
2629-UUx
2633-Txx

27L3447

DVD-ROM drive (HITACHI) 
OP
2628-Exx, Gxx
2629-Exx, Gxx, Hxx
2633-Gxx

08K9513

DVD-ROM drive (HITACHI) 
OP
2628-Rxx except RAx, Sxx, Txx, Xxx
2629-UUx
2633-Txx

27L4087

CD-R/W drive (SONY) 
OP
2629-Uxx except UUx

08K9617

for optional Ultrabay 2000 device, see “Optional FRUs” on
page 147.
16

Cover, Mini PCI adapter slot

17

Battery pack (6 cell)
Panasonic Li-Ion
2628-1xx, 2xx, 3xx, 4xx, Bxx
2628-Cxx, Dxx, Exx, Fxx, Gxx, Jxx except
xxE, xxJ, xxK
2628-Pxx, Qxx, Rxx, Sxx, Txx except xxE,
xxJ
2633-4xx, Txx
2633-Cxx, Dxx, Exx, Fxx, Gxx, Jxx except
xxE, xxJ, xxK

02K6614*

SANYO Li-Ion
2628-1xx, 2xx, 3xx, 4xx, Bxx
2628-Cxx, Dxx, Exx, Fxx, Gxx, Jxx except
xxE, xxJ, xxK
2628-Pxx, Qxx, Rxx, Sxx, Txx except xxE,
xxJ
2633-4xx, Txx
2633-Cxx, Dxx, Exx, Fxx, Gxx, Jxx except
xxE, xxJ, xxK

02K6618*

Panasonic Li-Ion (ECO)
2628-xxE
2628-DxJ, ExJ, FxJ, GxE, GxJ, IxJ
2628-xxJ except CxJ, JxJ
2633-DxJ, ExJ, FxJ, GxE, GxJ, IxJ

02K6769*

(continued)

130

08K7294

ThinkPad A20m/p, A21m/p, A22m/p

Parts list
No.
17

FRU

P/N

Battery pack (6 cell)
SANYO Li-Ion (ECO)
2628-xxE, xxJ
2628-DxJ, ExJ, FxJ, GxE, GxJ, IxJ
2628-xxJ except CxJ, JxJ
2633-DxJ, ExJ, FxJ, GxE, GxJ, IxJ

02K6770*

Panasonic NiMH (ECO)
2628-CxK

02K6720*

SANYO NiMH (ECO)
2628-CxJ, JxJ

02K6864*

Battery pack (9 cell)
Panasonic Li-Ion 
OP
2629-6xx
2629-Hxx except HxJ
2629-Uxx except UxE, UxJ

02K6615*

SANYO Li-Ion 
OP
2629-6xx
2629-Hxx except HxJ
2629-Uxx except UxE, UxJ

02K6619*

Panasonic Li-Ion (ECO)
2629-HxJ, UxE, UxJ

02K6860*

SANYO Li-Ion (ECO)
2629-HxJ, UxE, UxJ

02K6862*

18

Cover, DIMM slot

08K7295

19

Hard-disk drive (6.0 GB), STD 
OP
2628-1xx except 10U, 1ZU
2628-2xx except 20U
2628-Bxx

05K9227

Hard-disk drive (6.0 GB), HITACHI 
OP
2628-1xx except 10U, 1ZU
2628-2xx except 20U
2628-Bxx

05K9228

Hard-disk drive (10.0 GB), STD 
OP
2628-Cxx, Dxx, Exx, Jxx, Pxx

08K9508

Hard-disk drive (10.0 GB), HITACHI 
OP
2628-Cxx, Dxx, Exx, Jxx, Pxx

08K9531

Hard-disk drive (12.0 GB), STD 
OP
2628-3xx except 30U, 3JC, 3KC, 3ZU
2628-4xx except 40U, 4ZU
2633-4xx

05K9229

Hard-disk drive (12.0 GB), HITACHI 
OP
2628-3xx except 30U, 3JC, 3KC, 3ZU
2628-4xx except 40U, 4ZU
2633-4xx

05K9230

Hard-disk drive (18.0 GB), STD 
OP
2628-3JC, 3KC
2629-6xx except 60U

27L4073

(continued)

ThinkPad A20m/p, A21m/p and A22m/p

131

Parts list
No.
19

20

FRU

P/N

Hard-disk drive (18.0 GB), STD 
OP
2628-3JC, 3KC
2629-6xx except 60U

27L4073

Hard-disk drive (20.0 GB), STD 
OP
2628-Qxx, Rxx, Sxx, Xxx, T7x, T8x, TUx,
TVx
2629-6Ax, 6Cx, 6Ux, 6Vx

27L4075

Hard-disk drive (20.0 GB), STD 
OP
2628-Fxx, Gxx, Jxx
2633-Gxx

27L3427

Hard-disk drive (20.0 GB), HITACHI 
OP
2628-Fxx, Gxx, Jxx
2628-Qxx, Rxx, Sxx, Xxx, T7x, T8x, TUx,
TVx
2633-Gxx

08K9533

Hard-disk drive (30.0 GB), STD 
OP
2628-Txx except T7x, 8x, TUx, TVx
2633-Txx

08K9564

Hard-disk drive (30.0 GB), HITACHI 
OP
2628-Txx except T7x, 8x, TUx, TVx
2633-Txx

08K9692

Hard-disk drive (32.0 GB), STD 
OP
2629-Hxx, Uxx

08K9509

Cover, hard-disk drive for 12.1/14.1-in. models
2628-1xx, 2xx, 4xx, Bxx, Cxx, Dxx, Exx,
Gxx, Qxx, Rxx, Txx
2633-4xx, Gxx, Txx

08K5675

Cover, hard-disk drive for 15.0-in. models
2628-3xx, Fxx, Jxx, Pxx, Sxx
2629-6xx, Fxx, Hxx, Jxx, Uxx

08K5676

—

Asset ID RF adapter (see “Optional FRUs” on page 147)

21

System board for A20
Video memory 4 MB
2628-1xx, 2xx, Bxx

08K3314

Video memory 8 MB
2628-3xx except 3JC, 3KC

08K3315

Video memory 8 MB
2628-4xx, 3JC, 3KC, 2633-4xx

08K3316

Video memory 16 MB
2629-6xx

08K3317

System board for A21
Video memory 4 MB
2628-Cxx, Jxx

08K3262

Video memory 4 MB
2628-Dxx, Exx

08K3263

Video memory 4 MB
2628-Jxx

26P7975

(continued)

132

ThinkPad A20m/p, A21m/p, A22m/p

Parts list
No.
21

FRU

P/N

System board for A21
Video memory 8 MB
2628-Gxx, Fxx, 2633-Gxx

08K3264

Video memory 16 MB
2629-Hxx

08K3265

System board for A22

22

23

without Video memory
2628-Sxx

26P8104

Video memory 4 MB
2628-Qxx

26P8105

Video memory 4 MB
2628-Pxx, Rxx, Xxx

26P8106

Video memory 8 MB
2628-Txx, 2633-Txx

26P8102

Video memory 16 MB
2629-Uxx, Yxx

26P8103

64-MB SDRAM SO DIMM (PC100) 
OP
2628-1xx except 10U, 1ZU
2628-2xx except 20U
2628-3xx except 30U, 3JC, 3KC, 3ZU
2628-4xx except 40U, 4Hx, 4Ix, 4Lx
2628-Cxx, Dxx, Exx, Fxx, Gxx, Jxx, Pxx,
Qxx, Rxx, Xxx, T7x, T8x, TUx, TVx
2633-4xx, Gxx

20L0264*

128-MB SDRAM SO DIMM (PC100) 
OP
2628-4Hx, 4Ix
2628-3JC, 3KC, 4Lx
2628-Txx except T7x, T8x, TUx, TVx
2629-6xx except 60U, 6ZU
2629-Hxx, Uxx
2633-Txx

20L0265*

Thermal rubbers
2628-Pxx, Qxx, Rxx
2629-Uxx
2633-Txx

08K7157

2628-Sxx, Txx
2629-Uxx
2633-Txx

26P9337

(continued)

ThinkPad A20m/p, A21m/p and A22m/p

133

Parts list
No.

FRU

P/N

CPU, Celeron 500 MHz
2628-1xx, 3xx, 47x, 48x

08K3149

CPU, Celeron 550 MHz
2628-1Ax, 1Cx, 1Ux, 1Vx, 1ZU, 3Ax, 3Cx,
3Ux, 3Vx, 3ZU

08K3211

CPU, Pentium III 500 MHz
2628-2xx, Bxx

10L1415

CPU, Pentium III 600 MHz with SpeedStep
technology
2628-4Ax, 4Cx, 4Ux, 4Vx, 4ZU

08K3213

CPU, Pentium III 650 MHz with SpeedStep
technology
2628-4Dx, 4Ex, 4Fx, 4Gx

10L1405

CPU, Pentium III 650 MHz with SpeedStep
technology
2628-Hxx

12P3450

CPU, Pentium III 700 MHz with SpeedStep
technology
2628-4xx except 47x, 48x, 4Dx, 4Ex, 4Fx,
4Gx
2628-3JC, 3KC, 4Lx
2629-6xx
2633-4xx

10L1417

CPU, Pentium III 750 MHz with SpeedStep
technology
2628-Fxx
2629-6Ax, 6Cx, 6Ux, 6Vx, 6ZU

08K3191

CPU, Pentium III 800 MHz with SpeedStep
technology
2628-Gxx, Pxx, Qxx
2633-Gxx

12P3448

CPU, Pentium III 850 MHz with SpeedStep
technology
2628-Rxx, Xxx

12P3450

CPU, Pentium III 900 MHz with SpeedStep
technology
2628-Sxx

26P8126

CPU, Pentium III 900 MHz with SpeedStep
technology
2629-Yxx

08K3346

CPU, Pentium III 1 GHz with SpeedStep
technology
2628-Txx
2629-Uxx
2633-Txx

08K3392

25

Upper shield assembly, front

08K7286

26

Diskette drive (TEAC)

05K9157

Diskette drive (SONY)

08K9552

24

(continued)

134

ThinkPad A20m/p, A21m/p, A22m/p

Parts list
No.

FRU

P/N

27

Spacer, diskette drive for 2629

04P3225

28a

Microphone/speaker cable for A20m/A20p,
A21m/A21p
2628-1xx, 2xx, 3xx, 4xx, Bxx, Dxx, Exx,
Fxx, Gxx
2629-6xx, Dxx, Fxx, Gxx, Hxx
2633-4xx, Gxx

27L0484

28b

Speaker cable for A22m/A22p
2628-Cxx, Jxx, Pxx, Qxx, Rxx, Sxx, Txx
2629-Uxx
2633-Txx

27L0601

29

Keyboard* (see “Keyboard” on page 140)

30

Pointing stick cap for A20, 21

84G6536*

Pointing stick cap for A22

26P9212*

31

Clear sheet LED icon for A22

08K7304

32

Fan duct for A22
2628-Sxx, Txx, 2629-Uxx, 2633-Txx

26P9208

33

RJ45/11 connector assembly for A22

27L0645

—

Telephone cable

27L0603*

—

Video cable
2628-Fxx, Gxx
2629-6xx, Fxx, Gxx, Hxx, Uxx
2633-Gxx

27L0531

—

AC adapter (see “AC adapter” on page 136.)

—

Recovery CD (see “Recovery CDs” on page 141.)

ThinkPad A20m/p, A21m/p and A22m/p

135

Parts list

AC adapter
All of the AC adapters listed below are CRUs (customer
replaceable units.)
FRU

P/N

AC adapter (72 W), 2-pin (ASTEC)
models xxE, xxF, xxJ, xxP, xxS, xxU, xxX

02K6669

AC adapter (72 W), 2-pin (DELTA)
models xxE, xxF, xxJ, xxP, xxS, xxU, xxX

02K6673

AC adapter (72 W), 2-pin (SANKEN)
models xxE, xxF, xxJ, xxP, xxS, xxU, xxX

02K6677

AC adapter (72 W), 3-pin (ASTEC)
models xxC, xxG, xxH, xxK, xxT, xxY

02K6666

AC adapter (72 W), 3-pin (DELTA)
models xxC, xxG, xxH, xxK, xxT, xxY

02K6670

AC adapter (72 W), 3-pin (SANKEN)
models xxC, xxG, xxH, xxK, xxT, xxY

02K6674

LCD FRUs
12.1-in. SVGA TFT
Following FRUs are available for MT2628-1xx, 2xx, Bxx,
Cxx, Dxx, Qxx.
FRU

P/N

LCD cover assembly
2628-1xx, 2xx, Bxx, Cxx, Dxx except xxK

08K5655

2628-1xK, 2xK
2628-CxK, DxK

08K5659

2628-Qxx except QxK (with heatpipe)

08K7288

2628-QxK (with heatpipe)
LCD cable 12.1

08K7289
27L0485

LCD panel 12.1 SVGA (SANYO)

05K9577

Hinges 12.1

08K5664

Inverter card 12.1/14.1/15.0
2628-1xx, 2xx, Bxx

08K3120

Inverter card 12.1 (large)
2628-Cxx, Dxx, Qxx

08K3325

136

ThinkPad A20m/p, A21m/p, A22m/p

Parts list

14.1-in. XGA TFT
Following FRUs are available for MT2628-4xx, Exx, Gxx,
Txx, Xxx, MT2633-4xx, Gxx, Txx.
FRU

P/N

LCD cover assembly 14.1 XGA
2628-4xx, Exx except xxK
2633-4xx except 4xK

08K5656

2628-4xK, ExK
2633-4xK

08K5660

2628-Txx except TxK
2628-Xxx
2633-Txx except TxK
2633-Xxx

12P4215

2628-TxK
2633-TxK

08K7291

with heatpipe
2628-Gxx except GxK
2633-Gxx except GxK

04P3485

with heatpipe
2628-GxK
2633-GxK

08K7111

LCD cable 14.1
2628-4xx, Exx, Gxx, Txx, Xxx
2633-4xx, Gxx,Txx

27L0486

LCD panel 14.1 XGA (DBU)
2628-4xx, Exx, Gxx, Txx, Xxx
2633-4xx, Gxx, Txx

05K9578

LCD panel 14.1 XGA (SAMSUNG)
2628-4xx, Exx, Gxx, Txx, Xxx
2633-4xx, Gxx, Txx

05K9588

Hinges 14.1
2628-4xx, Exx, Gxx, Txx, Xxx
2633-4xx, Gxx, Txx

08K5665

Inverter card 12.1/14.1/15.0
2628-4xx
2633-4xx

08K3120

Inverter card 12.1/14.1/15.0
2628-Exx

12P3051

Inverter card (slim)
2628-Gxx, Txx
2633-Gxx, Txx

12P3053

ThinkPad A20m/p, A21m/p and A22m/p

137

Parts list

15.0-in. XGA TFT (LG)
Following FRUs are available for MT2628-3xx, Jxx, Pxx,
Rxx.
FRU

P/N

LCD cover assembly 15.0 XGA
2628-3xx, Jxx except xxK (without heatpipe)

26P9403

2628-3xK, JxK (without heatpipe)

26P9404

2628-Pxx, Rxx except xxK(with heatpipe)

26P9405

2628-PxK, RxK(with heatpipe)

26P9406

LCD cable 15.0 XGA (LG)
2628-3xx, Jxx, Pxx, Rxx

27L0578

LCD panel 15.0 XGA (LG)
2628-3xx, Jxx, Pxx, Rxx

05K9647

Hinges 15.0 (LG) (for 2628-3xx)

04P3051

Hinges 15.0
2628-3xx, Jxx, Pxx, Rxx

04P3488

Inverter card 12.1/14.1/15.0 (for 2628-3xx)

08K3120

Inverter card 15.0 XGA (for 2628-Jxx)

08K3326

Inverter card (slim) (for 2628-Pxx, Rxx)

12P3053

Misc kit for 15.0 XGA (LG) for 2628-Jxx (see “Miscellaneous
parts” on page 145.)

15.0-in. XGA TFT (SAMSUNG)
Following FRUs are available for MT2628-3xx, Fxx, Jxx,
Pxx, Rxx .
FRU

P/N

LCD cover assembly 15.0 XGA
2628-3xx, Jxx except xxK (without heatpipe)

26P9403

2628-3xK, JxK (without heatpipe)

26P9404

2628-Fxx, Pxx, Rxx except xxK(with heatpipe)

26P9405

2628-FxK, PxK, RxK(with heatpipe)

26P9406

LCD cable 15.0 XGA (SAMSUNG)
2628-3xx, Fxx, Jxx, Pxx, Rxx

27L0487

LCD panel 15.0 XGA (SAMSUNG)
2628-3xx, Fxx, Jxx, Pxx, Rxx

05K9580

Hinges 15.0
2628-3xx, Fxx, Jxx, Pxx, Rxx, Sxx

04P3488

Inverter 12.1/14.1/15.0 (for 2628-3xx)

08K3120

Inverter card 15.0 XGA (for 2628-Jxx)

08K3326

Inverter card (slim) (for 2628-Gxx, Pxx, Rxx, Sxx)

12P3053

138

ThinkPad A20m/p, A21m/p, A22m/p

Parts list

15.0-in. SXGA+ TFT
Following FRUs are available for MT2628-Sxx and
2629-6xx.
FRU

P/N

LCD cover assembly
2628-Sxx except SxK (with heatpipe LM)

26P9210

2628-SxK (with heatpipe LM)

26P9211

2629-6xx except 6xK

26P9532

2629-6xK

26P9533

LCD cable 15.0 SXGA+ (for 2629-6xx)

27L0488

LCD cable 15.0 SXGA+
2628-Sxx
2629-6xx

27L0662

LCD panel 15.0 SXGA+ (DBU)
2628-Sxx
2629-6xx

05K9581

Hinges 15.0
2628-Fxx, Jxx, Sxx
2629-6xx

04P3488

Inverter card (slim) (for 2629-Fxx, Gxx)

12P3053

15.0-in. UXGA TFT
Following FRUs are available for MT2629-Hxx, Uxx, Yxx.
FRU

P/N

LCD cover assembly
2629-6xx, Hxx, Uxx except xxK

26P9532

2629-6xK, HxK, UxK

26P9533

LCD cable 15.0 UXGA (for 2629-Hxx, Uxx)

27L0664

LCD panel 15.0 UXGA (DBU) (for 2629-Hxx, Uxx)

05K9835

LCD panel 15.0 UXGA (LG) (for 2629-Hxx, Uxx)

05K9693

Hinges 15.0 (for 2629-Hxx, Uxx)

04P3488

Inverter card (slim) (for 2629-Hxx, Uxx)

12P3053

ThinkPad A20m/p, A21m/p and A22m/p

139

Parts list

Keyboard
All of the keyboards listed below are CRUs (customer
replaceable units.)
Language

P/N
A20m/p

A21m/p

A22m/p

Arabic

02K5051

02K5476

Belgian

02K5045

02K5470

Canadian French

02K5035

02K5456

Chinese, traditional

02K5057

02K5459

Czech

02K5055

02K5480

Danish

02K5042

02K5467

Dutch

02K5039

02K5464

English, U.K.

02K5036

02K5461

English, U.S.

02K5034

02K5455

French, European

02K5038

02K5463

German

02K5037

02K5462

Greek

02K5048

02K5473

Hebrew

02K5049

02K5474

Hungarian

02K5054

02K5479

Italian

02K5043

02K5468

Japanese

02K5056

02K5458

Korean

02K5058

02K5460

Norwegian

02K5041

02K5466

Polish

02K5150

02K5481

Portuguese

02K5047

02K5472

Russian

02K5052

02K5477

Slovak

02K5053

02K5478

Slovenian

02K5151

02K5482

Spanish, European

02K5044

02K5469

Spanish, Latin American

02K5059

02K5457

Swedish or Finnish

02K5040

02K5465

Swiss

02K5046

02K5471

Thai
Turkish

140

—

—

02K5050

ThinkPad A20m/p, A21m/p, A22m/p

02K5759
02K5475

Parts list

Recovery CDs
For Windows 98 (A22m)
Language

P/N

Arabic

23P8930

Chinese, Simplified

27P2266

Chinese, Traditional

27P2261

Czech

23P8931

Danish

23P8897

Dutch

23P8904

English, U.S.

23P8892

English, U.K.

23P8893

Finnish

23P8903

French, Canadian

23P8894

French, European

23P8898

German

23P8899

Greek

23P8935

Hebrew

23P8932

Hungarian

23P8936

Italian

23P8902

Japanese

46P4403

Norwegian

23P8905

Polish

23P8933

Portuguese

23P8896

Spanish, European

23P8900

Spanish, Latin American

23P8895

Slovenian

23P8938

Slovak

23P8939

Swedish

23P8901

Thai

23P8940

Turkish

23P8934

Russian

23P8937

ThinkPad A20m/p, A21m/p and A22m/p

141

Parts list

For Windows 98 (A22p)
Language

P/N

Arabic

23P9062

Arabic (modem enabled)

14P9553

Chinese, Simplified

27P2256

Chinese, Traditional

27P2251

Czech

23P9063

Danish

23P9029

Dutch

23P9036

English, U.S.

14P9569

English, U.K.

14P9582

Finnish

23P9035

French, Canadian

23P9026

French, European

23P9030

German

14P9586

Greek

23P9067

Hebrew

23P9064

Hungarian

23P9068

Italian

23P9034

Japanese

46P4400

Norwegian

23P9037

Polish

23P9065

Portuguese

23P9028

Spanish, European

23P9032

Spanish, Latin American

23P9027

Slovenian

23P9070

Slovak

23P9071

Swedish

14P9590

Thai

23P9072

Turkish

23P9066

Russian

23P9069

142

ThinkPad A20m/p, A21m/p, A22m/p

Parts list

For Windows 2000 (A22m)
Language

P/N

Chinese, Simplified

27P2268

Chinese, Traditional

27P2263

For Windows 2000 (A22p)
Language

P/N

Chinese, Simplified

27P2258

Chinese, Traditional

27P2253

For Windows 2000/Windows NT (A22m)
Language

P/N

Arabic

23P9002

Czech

23P9003

Danish

23P8957

Dutch

23P8964

English, U.S.

23P8952

English, U.K.

23P8953

Finnish

23P8963

French, Canadian

23P8954

French, European

23P8958

German

23P8959

Greek

23P9007

Hebrew

23P9004

Hungarian

23P9008

Italian

23P8962

Japanese

27P1871

Norwegian

23P8965

Polish

23P9005

Portuguese

23P8956

Spanish, European

23P8960

Spanish, Latin American

23P8955

Slovenian

23P9010

Slovak

23P9011

Swedish

23P8961

Thai

23P9012

Turkish

23P9006

Russian

23P9009

ThinkPad A20m/p, A21m/p and A22m/p

143

Parts list

For Windows 2000/Windows NT (A22p)
Language

P/N

Arabic

23P9134

Arabic (modem enabled)

14P9558

Czech

23P9135

Danish

23P9089

Dutch

23P9096

English, U.S.

14P9572

English, U.K.

14P9594

Finnish

23P9095

French, Canadian

23P9086

French, European

23P9090

German

23P9091

Greek

23P9139

Hebrew

23P9136

Hungarian

23P9140

Italian

23P9094

Japanese

46P4400

Norwegian

23P9097

Polish

23P9137

Portuguese

23P9088

Spanish, European

23P9092

Spanish, Latin American

23P9087

Slovenian

23P9142

Slovak

23P9143

Swedish

23P9093

Thai

23P9144

Turkish

23P9138

Russian

23P9141

144

ThinkPad A20m/p, A21m/p, A22m/p

Parts list

Miscellaneous parts
FRU

P/N

Screw kit (including nylon-coated screws):
v M2 x 3.6 mm, flat head (3)
v M2 x 5.1 mm, flat head (5)
v M2 x 5.7 mm, flat head (5)
v M2 x 16 mm, bind head (3)
v M2.5 x 4.8 mm, flat head (42)
v M2.5 x 5.5 mm, flat head (2)
v M2.5 x 15 mm, flat head (15)
v M2.6 x 2.8 mm, bind head (7)
v M3 x 2.8 mm, small head (5)
v Coin screw (1)
v Security screw (1)
v Screw caps (14)

04P3973

Base miscellaneous parts:
v Lens, IR
v Lens, Ultrabay 2000 LES
v Lock, battery
v Spring, battery lock
v Lid, docking FR
v Lid, docking RR
v Spring, lid docking
v Rubber foot
v Sponge
v Sponge, shield lower
v Sponge, small
v Blank cap, battery
v Screw caps
v Cu tape

08K5647

System miscellaneous parts (for A20m/p, A21m/p):
v Door, PC card slots
v Door, PC card 1 slot
v Spring, PC card slots
v Lens, LED hinge
v Blank cap, TV connector
v Eject knob, Ultrabay 2000
v Lock lever, Ultrabay 2000
v Spring, Ultrabay 2000
v Insulator, hard-disk drive
v Insulator, keyboard CRU
v Mini PCI guide
v (a) Stiffner, CPU socket
v Screw caps

04P3966

(continued)

ThinkPad A20m/p, A21m/p and A22m/p

145

Parts list
FRU

P/N

System miscellaneous parts (for A22m/p):
v Keyboard stopper
v Door, PC card slots
v Door, PC card 1 slot
v Spring, PC card slots door
v Lens, LED hinge
v Blank cap, TV connector
v Eject knob, Ultrabay 2000
v Lock lever, Ultrabay 2000
v Spring 1, Ultrabay 2000
v Spring 2, Ultrabay 2000
v Insulator, hard-disk drive
v Insulator, keyboard CRU
v Mini PCI guide
v (a) Stiffner, CPU socket - upper
v Screw caps

26P9209

Miscellaneous parts, for system board (for A20m/p,
A22m/p):
v I/O bracket (right/left)
v Guide, keyboard connector
v Hex stud
v I/O bracket spacer
v FDD sponge
v Docking hole cap
v Flat head screw (M2.5 x 4.8)
v Screw caps

26P9335

Miscellaneous parts, for diskette drive:
v Bezel
v Bezel without icon
v Bracket
v Flexible cable
v Screw caps

26P9336

Miscellaneous parts, for LCD:
v Latch (right/left)
v Spring
v Spacer (for 15.0-in.)
v Blank cap, UltraPort
v Screw caps

04P3968

Miscellaneous kit for LCD 15.0-in. LG
v Latch (RH 15.0 LG)
v Latch (LH 15.0 LG)
v Spring (15.0 LG)
v Spacer (for 15.0-in.)
v Screw caps

04P3050

146

ThinkPad A20m/p, A21m/p, A22m/p

Parts list

Optional FRUs
FRU

P/N

Ultrabay 2000 SuperDisk drive

05K9235

ZIP-250

00N8254

Multiple battery charger

02K6642

Ultrabay 2000 2nd HDD adapter

08K6067

Ultrabay 2000 battery

02K6645

UltraPort camera for MT2629

02K5153

IBM tripod

08K6449

UltraPort adapter and connector cover

08K6105

USB cable attachment

08K6108

USB cable

27L0542

ThinkPad Dock
PCI cover
ThinkPad Dock with extension plate
PCI cover with foot

08N1546
05K6246
08N1537
08K7317

Top cover and screw kit for ThinkPad Dock

12P4143

ThinkPad Port Replicator

08N1536

Asset ID RF adapter

08K6065

ThinkPad A20m/p, A21m/p and A22m/p

147

Parts list

Common parts list
Tools
Tools

P/N

Triconnector wrap plug

72X8546

PC test card

35G4703

Audio wrap cable

66G5180

USB parallel test cable

05K2580

Screwdriver kit

95F3598

Torque screwdriver

05K4695

5 mm socket wrench

05K4694

Screwdriver

27L8126

ThinkPad hardware maintenance diskette version
1.62
Note: Download the file from the Web site.

—

Power cords (system)
IBM power cords for a specific country are usually
available only in that region:
For 2-pin power cords:
Region

P/N

Canada, United States of America

13H5264

Japan

13H5273

Argentina

36L8870

For 3-pin power cords:
Region

P/N

Australia, New Zealand

76H3514

Taiwan, Thailand

76H3516

Italy

76H3530

Denmark

76H3520

U.K., China (Hong Kong S.A.R.)

76H3524

European countries

76H3518

India, South Africa

76H3522

Israel

76H3532

Korea

76H3535

China (P.R.C.) (other than Hong Kong)

02K0539

Switzerland

76H3528

148

ThinkPad A20m/p, A21m/p, A22m/p

Parts list

Power cords (docking station)
IBM power cords for a specific country are usually
available only in that region:
For 3-pin power cords:
Region

P/N

Argentina

36L8868

Australia, New Zealand

75H8988

Canada, Thailand, United States of America

75H8989

Denmark

75H8992

European countries

75H8990

India, South Africa

75H8993

Israel

75H8999

Italy

75H8998

Japan

75H8996

Korea

76H3536

People’s Republic of China (other than Hong Kong)

02K0540

Switzerland

75H8997

United Kingdom

75H8994

ThinkPad A20m/p, A21m/p and A22m/p

149

Notices

Notices
References in this publication to IBM products, programs,
or services do not imply that IBM intends to make these
available in all countries in which IBM operates. Any
reference to an IBM product, program, or service is not
intended to state or imply that only that IBM product,
program, or service may be used. Any functionally
equivalent product, program, or service that does not
infringe any of the intellectual property rights of IBM may
be used instead of the IBM product, program, or service.
The evaluation and verification of operation in conjunction
with other products, except those expressly designated by
IBM, are the responsibility of the user.
IBM may have patents or pending patent applications
covering subject matter in this document. The furnishing of
this document does not give you any license to these
patents. You can send license inquiries, in writing, to the
IBM Director of Licensing, IBM Corporation, 500 Columbus
Avenue, Thornwood, NY 10594, U.S.A.

Trademarks
The following terms are trademarks of the IBM Corporation
in the United States or other countries or both:
Asset ID
IBM
OS/2
ThinkLight
ThinkPad
TrackPoint
Ultrabay
UltraPort
Microsoft, Windows, Windows NT, and the Windows logo
are trademarks of Microsoft Corporation in the United
States and/or other countries.
Pentium is trademark of Intel Corporation in the United
States and/or other countries. (For a complete list of Intel
trademarks, see the legal information on
http://www.intel.com/)
Other company, product, or service names may be the
trademarks or service marks of others.

150

ThinkPad A20m/p, A21m/p, A22m/p

Notices

ThinkPad A20m/p, A21m/p and A22m/p

151



Part Number: 23P0896

(1P) P/N: 23P0896



---

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