Lenovo ThinkPad G41 Owner's manual

ThinkPad Computer
Hardware Maintenance Manual
July 2005
This manual supports: ThinkPad G40, G41

Note
Before using this information and the product it
supports, be sure to read the general information
under “Notices” on page 156.
First Edition (July 2005)
©Copyright Lenovo 2005.
Portions ©Copyright International Business Machines
Corporation 2005.
All rights reserved.
U.S. GOVERNMENT USERS –RESTRICTED RIGHTS:
Our products and/or services are provided with
RESTRICTED RIGHTS. Use, duplication or disclosure by
the Government is subject to the GSA ADP Schedule
contract with Lenovo Group Limited, if any, or the standard
terms of this commercial license, or if the agency is unable
to accept this Program under these terms, then we provide
this Program under the provisions set forth in Commercial
Computer Software–Restricted Rights at FAR 52.227-19,
when applicable, or under Rights in Data-General, FAR
52.227.14 (Alternate III).

Contents
About this manual ...........1
Introduction .............3
Important service information .........3
Strategy for replacing FRUs ........3
How to use error messages ........4
Diskette compatibility matrix .........4
Safety notices: multilingual translations ......4
Safety information............16
General safety ............16
Electrical safety ...........17
Safety inspection guide .........19
Handling devices that are sensitive to electrostatic
discharge ............20
Grounding requirements .........21
Laser compliance statement.........21
General descriptions ..........25
Read this first .............25
What to do first ...........25
Related service information .........28
Service Web site ...........28
Restoring the preloaded system ......28
Passwords .............30
Power management ..........33
Checkout guide ............35
Testing the computer ..........35
Detecting system information with PC-Doctor...37
Power system checkout .........38
ThinkPad G40, G41 ...........43
Product overview ............45
Specifications ............45
Status indicators ...........47
FRU tests .............49
Fn key combinations ..........51
Symptom-to-FRU index ..........52
Numeric error codes ..........52
Error messages ...........56
Beep symptoms ...........58
No-beep symptoms ..........58
LCD-related symptoms .........59
Intermittent problems ..........60
Undetermined problems .........60
FRU replacement notices .........61
Screw notices ............61
Retaining serial numbers.........62
Removing and replacing aFRU........65
1010 Battery pack...........66
1020 Hard disk drive ..........67
©Lenovo 2005. Portions ©IBM Corp. 2005. iii

1030 DIMM door ...........69
1040 DIMM ............70
1050 Modem daughter card (MDC) .....71
1060 Backup battery ..........72
1070 Keyboard ...........73
1080 Middle cover ..........75
1090 Hinge cover ...........76
1095 FDD assembly ..........77
1100 Blank bezel FDD assembly ......78
1110 VGA heatsink assembly .......79
1120 VGA card assembly ........80
1130 CD-ROM/DVD drive and ODD bracket ...81
1140 Mini PCI adapter .........82
1150 PC card slot assembly........83
1160 LCD and Keyboard bezel assembly ....86
1170 LCD assembly ..........89
1180 Keyboard bezel ..........92
1190 Fan assembly ..........94
2000 Fan (CPU 3GHz) and CPU fixture ....96
2010 CPU .............98
2020 CD-ROM/DVD drive bracket ......99
2030 FDD bracket .......... 100
2040 System board .......... 101
2050 Lower case assembly ....... 102
2060 Modem cable .......... 103
2070 PC card slot assembly ....... 104
2080 LCD front bezel ......... 105
2090 Inverter card .......... 106
3000 Speaker assembly ........ 107
3010 LCD cable assembly ........ 108
3020 Wireless antenna and rear cover ....110
3030 LCD panel and hinge assembly..... 111
Locations ..............112
Front view.............112
Rear view .............113
Bottom view ............114
Parts list ..............115
G40, G41 series ...........115
Overall ............. 139
LCD FRUs ............ 146
Keyboard ............. 149
Recovery CDs ........... 150
Miscellaneous parts .......... 153
AC adapters ............ 153
Telephone cable ........... 153
Optional FRUs ........... 154
Common parts list .......... 154
Notices .............. 156
Trademarks ............. 158
iv ThinkPad G40, G41

About this manual
This manual contains service and reference information for
ThinkPad G40 and G41 products. Use this manual along
with the advanced diagnostic tests to troubleshoot
problems.
The manual is divided into sections as follows:
vThe common sections provide general information,
guidelines, and safety information required in servicing
computers.
vThe 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 ThinkPad products, be sure to
review the safety information under “Safety notices:
multilingual translations” on page 4, “Safety
information” on page 16, and “Laser compliance
statement” on page 21.
©Lenovo 2005. Portions ©IBM Corp. 2005. 1

2ThinkPad G40, G41

Introduction
Important service information
Important
BIOS and device driver fixes are
customer-installable. The BIOS and device drivers
are posted on the customer support site
http://www.lenovo.com/think/support
Advise customers to contact the Customer Support
Center at 800-426-7378 if they need assistance in
obtaining or installing any diskette fixes.
Customers in Canada should call the Customer
Support Center at 800-565-3344 for assistance or
download information.
Strategy for replacing FRUs
Before replacing parts
Make sure that all software fixes are installed before
replacing any FRUs listed in this manual.
Use the following strategy to prevent unnecessary expense
for replacing and servicing FRUs:
vIf you are instructed to replace aFRU but the
replacement does not correct the problem, reinstall
the original FRU before you continue.
vSome computers have both aprocessor 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.
vIf 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. Loading Setup
Defaults or replacing the system board may alter the
settings. Note the current configuration settings (using the
BIOS Setup Utility); then, when service has been
completed, verify that those settings remain in effect.
©Lenovo 2005. Portions ©IBM Corp. 2005. 3

Strategy for replacing ahard disk drive
Always try to run alow-level format before replacing ahard
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:
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
Safety notices: multilingual translations
In this manual, safety notices appear in English with a
page number reference to the appropriate multilingual,
translated safety notice found in this section.
The following safety notices are provided in English,
French, German, Hebrew, Italian, and Spanish.
Important service information
4ThinkPad G40, G41

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 éstata
effettuata la sostituzione di una FRU, accertarsi che
tutte le viti, le molle etutte le altri parti di piccole
dimensioni siano nella corretta posizione enon siano
sparse all’interno dell’elaboratore. Verificare ciò
scuotendo l’elaboratore eprestando attenzione ad
eventuali rumori; eventuali parti opezzetti 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 yno
se encuentran sueltas dentro del sistema.
Compruébelo agitando el sistema yescuchando los
posibles ruidos que provocarían. Las piezas metálicas
pueden causar cortocircuitos eléctricos.
Safety notices
Introduction 5

Safety notice 2
DANGER
Some standby batteries contain asmall amount of
nickel and cadmium. Do not disassemble astandby
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 àl’eau.
Ne les mettez pas en court-circuit. Pour les mettre
au rebut, conformez-vous àla réglementation en
vigueur. Lorsque vous remplacez la pile de
sauvegarde ou celle de l’horloge temps réel, veillez
àn’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)
Safety notices
6ThinkPad G40, G41