Lenovo MT 1871 Owner's manual

ThinkPad Computer
Hardware Maintenance Manual
July 2005
This manual supports:
ThinkPad R50/R50p, R51 series
ThinkPad Dock II (MT 2877)
(MT 1829, 1830, 1831, 1832, 1833,
2889, 2894, 2895)
1836, 1840, 1841, 2883, 2887, 2888,

Note
Before using this information and the product it
supports, be sure to read the general information
under “Notices” on page 224.
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.........22
General descriptions ..........25
Read this first .............25
What to do first ...........25
Related service information .........27
Service Web site ...........27
Restoring the pre-installed system ......27
Passwords .............28
Power management ..........32
Checkout guide ............34
Testing the computer ..........34
Detecting system information with PC-Doctor...37
Power system checkout .........37
ThinkPad R50/R50p and R51 Series ......41
Product overview ............43
Specifications ............43
Status indicators ...........48
FRU tests .............50
Fn key combinations ..........52
Symptom-to-FRU index ..........54
Numeric error codes ..........54
Error messages ...........58
Beep symptoms ...........59
No-beep symptoms ..........59
LCD-related symptoms .........60
Intermittent problems ..........61
Undetermined problems .........61
FRU replacement notices .........62
Screw notices ............62
Retaining serial numbers.........63
Removing and replacing aFRU........66
1010 Battery pack...........67
1020 Ultrabay Enhanced device ......68
©Lenovo 2005. Portions ©IBM Corp. 2005. iii

1030 Hard disk drive ..........69
1040 DIMM (optional) .........71
1050 Keyboard ...........72
1060 DIMM (standard) .........76
1070 Modem daughter card (MDC/MDC-2) ...77
1080 Bluetooth/Modem daughter card
(BMDC/BMDC-2) ..........79
1090 Keyboard bezel ..........81
1100 Mini PCI adapter .........85
1110 Fan assembly ..........89
1120 CPU .............90
1130 Backup battery ..........91
1140 Speaker assembly .........92
1150 IEEE 1394 cable .........94
1160 PC Card slots assembly .......97
1170 Ultrabay Enhanced shield kit ......98
1180 LCD assembly.......... 105
1190 VGA and Ultrabay Enhanced device eject
button cable ........... 109
1200 System board, interposer card, and base
cover .............112
2010 LCD front bezel .........119
2020 Inverter card .......... 121
2030 LCD panel, LCD cable assembly, wireless
LAN antenna assembly, hinges, and LCD cover. 122
3010 ThinkPad Dock II PCI cover...... 132
3020 ThinkPad Dock II top cover ...... 133
Locations .............. 136
Front view ............ 136
Rear view ............. 138
Bottom view ............ 139
Parts list .............. 140
Overall ............. 140
LCD FRUs ............ 188
AC adapters ............ 206
Keyboard ............. 207
Recovery CDs ........... 209
Miscellaneous parts .......... 217
Optional FRUs ........... 221
Common parts list .......... 222
Notices .............. 224
Trademarks ............. 226
iv R50/R50p, R51 Series

About this manual
This manual contains service and reference information for
ThinkPad
® R50/R50p and R51 series (MT1829, 1830,
1831, 1832, 1833, 1836, 1840, 1841, 2883, 2887, 2888,
2889, 2894, 2895), and ThinkPad Dock II (MT2877)
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 aThinkPad product, 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 22.
©Lenovo 2005. Portions ©IBM Corp. 2005. 1

2R50/R50p, R51 Series

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 diskette 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 adevice 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.
©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 whether 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
4R50/R50p, R51 Series

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
6R50/R50p, R51 Series