IBM ThinkPad i Series 1400 Owner's manual

S09N-1084-01
IBM Mobile Systems
ThinkPad i Series 1400/1500 (2621, 2651)
Hardware Maintenance
Manual
February 2000

S09N-1084-01
IBM Mobile Systems
ThinkPad i Series 1400/1500 (2621, 2651)
Hardware Maintenance
Manual
February 2000
IBM

Before using this information and the product it supports,
be sure to read the general information under
“Introduction” on page 2, and “Read this first” on page 19.
First Edition (February 2000)
The following paragraph does not apply to the United
Kingdom or any country where such provisions are
inconsistent with local law:
INTERNATIONAL BUSINESS MACHINES CORPO-
RATION PROVIDES THIS PUBLICATION "AS IS"
WITHOUT ANY WARRANTY OF ANY KIND, EITHER
EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED
TO, THE LIMITED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. Some states do not allow disclaimers or
express or implied warranties in certain transactions; there-
fore, this statement may not apply to you.
This publication could include technical inaccuracies or
typographical errors. Changes are periodically made to the
information herein; these changes will be incorporated in
new editions of the publication. IBM may make improve-
ments or changes in the products or the programs
described in this publication at any time.
Requests for technical information about IBM products
should be made to your IBM Authorized Dealer or your
IBM Marketing Representative.
 Copyright International Business Machines Corpo-
ration 2000. All rights reserved. Note to US Government
Users — Documentation related to restricted rights — Use,
duplication, or disclosure is subject to restrictions set forth
in GSA ADP Schedule Contract with IBM Corp.

Preface
About this manual
This manual contains service and reference information for
IBM ThinkPad i Series 1400/1500 (2621) products. Use
this manual along with the advanced diagnostic tests to
troubleshoot problems effectively.
The manual is divided into sections as follows:
Common sections provides general information,
guidelines, and safety information required to service
computers.
Product-specific sections includes service, reference,
and product-specific parts information.
– Part I includes information on the models in
Group-A and B. (See the 2621 model table on
page iii.)
– Part II includes information on the models in
Group-C. (See the 2621 model table on page iii.)
Table 1 (Page 1 of 2). 2621– Model Table
I: 12.1"
TFT II: 14.1" TFT
III:
15.0"
TFT
IV:
13.0"
HPA
Group-A 447,
44T/44C,
44H/44K,
44S/44X
480/48U,
460/46U,
484/464,
487/467,
48M/46M,
48A/46A,
48T/46T,
48C/46C,
48H/46H,
48K/46K,
48F/46F,
48S/46S,
48P/46P,
48X/46X,
560/567
420/42U,
424/42N,
427,
42A/42M,
42S/42F,
42D/42X,
540/547
Group-B 441/445,
448/4BA,
4BT/4BC,
4BH/4BY,
4BK/4BF,
4BS/4BP,
4BX,
541/548
465/4CM,
4CA/4CT,
4CC/4CH,
4CK/4CF
421/428,
425/43J,
4AA/4AM,
4AF/4AS,
4AP/4AX
Preface iii

Important
This manual is intended for trained servicers who are
familiar with ThinkPad products. Use this manual
along with the advanced diagnostic tests to trouble-
shoot problems effectively. Before servicing an IBM
ThinkPad product, be sure to review the safety infor-
mation under “Safety Notices (Multilingual
Translations)” on page 4 and “Safety Information” on
page 11.
Related publications
The following product publications are available through
IBM or your IBM Authorized Dealer.
Related diskettes
The following diskettes are available through IBM or your
IBM Authorized Dealer.
Table 1 (Page 2 of 2). 2621– Model Table
I: 12.1"
TFT II: 14.1" TFT
III:
15.0"
TFT
IV:
13.0"
HPA
Group-C 442/4FT,
4FC/4FH,
4FK/4FF,
4FS/4FP,
4FX,
542/549,
5FF
482/489,
486/4GM,
4GA/4GT,
4GC/4GH,
4GK/4GF,
4GS/4GP,
4GX,
562/569
492/499,
496/49M,
49A/49T,
49C/49H,
49K/49F,
592
442/4E2,
429/4EM,
4EA/4EF,
4ES/4EP,
4EX
Publication Part, Form Number
Mobile Systems HMM Volume
1: Laptop, Notebook, Portable,
and ThinkPad Computers
(Models L40, CL57, N45, N51,
P70/P75, ThinkPad 300, 350,
500, 510, 710T, Expansion
Unit, Dock I, Dock II)
30H2356, S82G-1501-01
Mobile Systems HMM Volume
2: ThinkPad Computers
(Models 340, 355, 360, 370,
700, 701, 720, 750, 755)
30H2357, S82G-1502-03
Mobile Systems HMM Volume
3: ThinkPad Computers
(Models 365, 380, 385, 560,
760, SelectaDock)
84H8099, S82G-1503-05
Mobile Systems HMM Volume
4: ThinkPad Computers
(Models 380, 385, 560, 760,
765)
05L1271, S05L-1270-01
iv ThinkPad i Series 1400/1500 HMM

Diskette Part, Form Number
ThinkPad 300 (2615) Advanced
Diagnostics Diskette 33G9361, S33G-9361
ThinkPad 350, 350C, 425,
425C (2618) Advanced Diag-
nostics Diskette
A211000, GA21-1000
ThinkPad 365 (2625) Advanced
Diagnostics Diskette 76H7578, S30H-2498
ThinkPad 380/385 (2635) Main-
tenance Diskette 06J0333, S06J-0333
ThinkPad 500 (2603) Advanced
Diagnostics Diskette 71G3702, S71G-3702
ThinkPad 510 (2604) Advanced
Diagnostics Diskette 83G8095, S83G-8095
ThinkPad 700 (9552) Reference
Diskette 42G2017, S42G-2017
ThinkPad 700C (9552) Refer-
ence Diskette 42G2023, S42G-2023
ThinkPad 720/720C (9552) Ref-
erence Diskette 61G1194, S61G-1194
ThinkPad i Series 1400 (2611)
Diagnostic and Utilities
diskettes
01K4841, S01K-4841-00
ThinkPad Hardware Mainte-
nance Diskette (for all Models
355, 360, 560, 750, 755, 760)
78H5384, S78H-5384
ThinkPad Dock I (3545) 71G4140, S71G-4140
Docking Station (3550) 42G2428, S42G-2428
Data/Fax Modem 61G1556, S61G-1556
FaxConcentrator/A 84F8540, S84F-8540
Preface v

vi ThinkPad i Series 1400/1500 HMM

Contents
Preface . . . . . . . . . . . . . . . . . . . . . iii
ThinkPad i Series 1400/1500 Hardware Maintenance
Manual . . . . . . . . . . . . . . . . . . . . . 1
General Descriptions . . . . . . . . . . . . . . . 1
Introduction . . . . . . . . . . . . . . . . . . . . 2
Important Service Information .......... 2
Drive and Diskette Compatibility Matrix ..... 3
Safety Notices (Multilingual Translations) .... 4
Safety Information . . . . . . . . . . . . . . . 11
Laser Compliance Statement .......... 16
Read this first ................... 19
What to do first ................ 19
FRU replacement notices ............. 21
LCD replacement notice ............ 21
Screw notices . . . . . . . . . . . . . . . . . 21
System board/Inverter replacement notice .... 22
Bios Levels . . . . . . . . . . . . . . . . . . 23
Flash (BIOS) update procedure ......... 23
Related service information ............ 24
Power button as reset switch .......... 24
Running a low-level format ........... 24
Service Web site ............... 24
Passwords . . . . . . . . . . . . . . . . . . 24
Power management features .......... 26
Fn key combinations .............. 27
Checkout guide . . . . . . . . . . . . . . . . . . 28
Testing the computer ............. 28
Related service information ........... 29
Power systems checkout ............ 30
Symptom-to-FRU Index . . . . . . . . . . . . . . 33
Numeric Error Codes and Messages ...... 33
LCD-Related Symptoms . . . . . . . . . . . . 34
Keyboard/TrackPoint-Related Symptoms . . . . 35
Indicator-Related Symptoms . . . . . . . . . . 35
Power-Related Symptoms . . . . . . . . . . . 35
Memory-Related Symptoms . . . . . . . . . . 36
Audio-Related Symptoms . . . . . . . . . . . 36
PC Card (PCMCIA)-Related Symptoms ..... 37
Power Management-Related Symptoms ..... 37
Peripheral-Device-Related Symptom . . . . . . 37
Modem-Related Symptoms . . . . . . . . . . . 38
Intermittent Problems . . . . . . . . . . . . . 38
Undetermined Problems . . . . . . . . . . . . 38
Locations . . . . . . . . . . . . . . . . . . . . . 40
Front View . . . . . . . . . . . . . . . . . . 40
Rear View . . . . . . . . . . . . . . . . . . . 41
Bottom View . . . . . . . . . . . . . . . . . . 42
Switch Locations . . . . . . . . . . . . . . . . 43
ThinkPad i Series 1400/1500 (Part I) ........ 43
Contents vii

Product overview . . . . . . . . . . . . . . . 44
FRU removals and replacements ........ 50
Parts list (ThinkPad i Series 1400/1500) ..... 90
ThinkPad i Series 1400/1500 (Part II) ...... 107
Product overview . . . . . . . . . . . . . . 108
FRU removals and replacements ....... 113
Parts list (ThinkPad i Series 1400/1500) .... 142
Notices . . . . . . . . . . . . . . . . . . . . . 160
Trademarks . . . . . . . . . . . . . . . . . . 161
viii ThinkPad i Series 1400/1500 HMM

ThinkPad i Series 1400/1500
Hardware Maintenance Manual
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.
ThinkPad i Series 1400/1500 1