IBM ThinkPad 390E Owner's manual

S37L-5153-01
IBM Mobile Systems
ThinkPad 390E (2626)
Hardware Maintenance Manual
March 1999

Before using this information and the product it supports,
be sure to read the general information under “Read This
First” on page 19.
First Edition (March 1999)
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.
It is possible that this publication may contain references
to, or information about, IBM products (machines and pro-
grams), 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 Corpo-
ration 1999. 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.

About This Manual
This manual contains service and reference information for
IBM ThinkPad 390E (2626) products. Use this manual
along with the advanced diagnostic tests to troubleshoot
problems effectively.
The manual is divided into sections as follows:
The Introduction section provides general information,
guidelines, and safety information required to service
computers.
The product-specific section includes service, refer-
ence, and product-specific parts information.
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 information under “Safety Notices
(Multi-lingual Translations)” on page 4 and “Safety
Information” on page 11.
iii

Related Publications
The following product publications are available through
IBM or your IBM Authorized Dealer.
Publication Part, Form Number
Mobile Systems HMM
Volume 1: Laptop, Note-
book, 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 Com-
puters
(Models 340, 355, 360, 370,
700, 701, 720, 750, 755)
30H2357, S82G-1502-03
Mobile Systems HMM
Volume 3: ThinkPad Com-
puters
(Models 365, 380, 385, 560,
760, SelectaDock)
84H8099, S82G-1503-05
Mobile Systems HMM
Volume 4: ThinkPad Com-
puters
(Models 380, 385, 560, 760,
765)
05L1271, S05L-1270-01
iv ThinkPad 390E

Related Diskettes
The following diskettes are available through IBM or your
IBM Authorized Dealer.
Diskette Part, Form Number
ThinkPad 300 (2615)
Advanced Diagnostics
Diskette
33G9361, S33G-9361
ThinkPad 350, 350C, 425,
425C (2618) Advanced
Diagnostics Diskette
A211000, GA21-1000
ThinkPad 365 (2625)
Advanced Diagnostics
Diskette
76H7578, S30H-2498
ThinkPad 380/385 (2635)
Maintenance 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)
Reference Diskette 42G2023, S42G-2023
ThinkPad 720/720C (9552)
Reference Diskette 61G1194, S61G-1194
ThinkPad Hardware
Maintenance 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
v

vi ThinkPad 390E

Contents
Introduction . . . . . . . . . . . . . . . . . . . 1
Important Service Information ........... 1
How to Use Error Messages .......... 2
How to Read POST Error Messages ...... 2
Drive and Diskette Compatibility Matrix ....... 3
Safety Notices (Multi-lingual Translations) ..... 4
Safety Information . . . . . . . . . . . . . . . . 11
General Safety . . . . . . . . . . . . . . . . 11
Electrical Safety . . . . . . . . . . . . . . . . 12
Safety Inspection Guide ............ 13
Handling Electrostatic Discharge-Sensitive Devices 15
Grounding Requirements . . . . . . . . . . . . 15
Laser compliance statement ............ 16
ThinkPad 390E Hardware Maintenance Manual .. 19
Read This First .................. 19
What to Do First ................ 19
How to Disable the Password ......... 20
Product Overview . . . . . . . . . . . . . . . . . 22
Fn Key Combinations ............. 24
Status Indicators . . . . . . . . . . . . . . . . 25
Checkout Guide . . . . . . . . . . . . . . . . . 27
Audio Checkout . . . . . . . . . . . . . . . . 28
Diskette Drive Checkout ............ 28
CD-ROM ASM Checkout ............ 28
Fan ASM Checkout .............. 29
Keyboard and Auxiliary Input Device Checkout . 30
Memory Checkout . . . . . . . . . . . . . . . 31
Modem Board Checkout ............ 32
Power System Checkout ............ 33
TrackPoint Checkout . . . . . . . . . . . . . . 35
Power Management Features ......... 36
Symptom-to-FRU Index . . . . . . . . . . . . . . 39
Numeric Error Codes .............. 40
Error Messages . . . . . . . . . . . . . . . . 43
No Beep Symptoms .............. 43
LCD-Related Symptoms . . . . . . . . . . . . 44
Keyboard-Related Symptoms . . . . . . . . . . 44
Indicator-Related Symptoms . . . . . . . . . . 44
Power-Related Symptoms . . . . . . . . . . . 44
PC Card (PCMCIA)-Related Symptoms ..... 45
Speaker-Related Symptoms . . . . . . . . . . 45
Power Management-Related Symptoms ..... 45
Peripheral-Device-Related Symptom . . . . . . 46
Intermittent Problems . . . . . . . . . . . . . 46
Undetermined Problems . . . . . . . . . . . . 47
CE Utility Program Diskette ............ 48
Setting the LCD Panel ID ........... 48
Setting the Thermal Sensor .......... 48
Writing the RFID Data ............. 49
Contents vii

Flash UUID . . . . . . . . . . . . . . . . . . 49
Running the Diagnostics .............. 50
PC Doctor System Diagnostics ......... 51
FRU Removals and Replacements ......... 60
FRU Service Procedures ............ 61
Battery ASM . . . . . . . . . . . . . . . . . . 62
Hard Disk Drive ................ 63
Combo Bay . . . . . . . . . . . . . . . . . . 64
Diskette Drive (FDD ASM) ........... 64
CD-ROM ASM . . . . . . . . . . . . . . . . . 65
Combo Bay FPC ............... 66
Hard Disk Adapter Combo Bay ASM ...... 67
Modem Card . . . . . . . . . . . . . . . . . 68
Backup Battery (RTC) ............. 69
Keyboard . . . . . . . . . . . . . . . . . . . 70
LED Board . . . . . . . . . . . . . . . . . . 72
Upper Heatsink . . . . . . . . . . . . . . . . 73
PCMCIA Slots . . . . . . . . . . . . . . . . . 74
CPU Board . . . . . . . . . . . . . . . . . . 75
LCD Panel ASM ................ 76
Upper Cover ASM ............... 78
IMM Lower Heatsink ASM ........... 80
FanASM . . . . . . . . . . . . . . . . . . . 81
Power Latch, IR Board, and DC-DC & BATT Board 83
System Board . . . . . . . . . . . . . . . . . 84
Combo Bay Interposer Board .......... 85
LCD Bezel ASM 14.1" ............. 86
Speaker ASM 14.1" .............. 87
VR Board ASM 14.1" ............. 88
Microphone ASM 14.1" ............. 89
LCD Panel ASM 14.1" ............. 89
LCD Inverter ASM 14.1" ............ 91
LCD FPC ASM 14.1" .............. 92
LCD Bezel ASM 13.3" ............. 93
Speaker ASM 13.3" .............. 94
VR Board ASM 13.3" ............. 95
LCD Inverter ASM 13.3" ............ 96
Microphone ASM 13.3" ............. 97
LCD Panel ASM 13.3" ............. 98
LCD FPC ASM 13.3" .............. 99
LCD Bezel ASM 12.1" ............ 100
Speaker ASM 12.1" ............. 101
VR Board ASM 12.1" ............ 102
LCD Inverter ASM 12.1" ........... 103
Microphone ASM 12.1" ............ 104
LCD Panel ASM 12.1" ............ 104
LCD FPC ASM 12.1" ............. 105
Switch Location . . . . . . . . . . . . . . . 106
System Unit Parts Listing ............ 107
LCD Unit Parts Listing .............. 112
12.1" LCD ASM Parts Listing ......... 112
13.3" LCD ASM Parts Listing ......... 114
14.1" LCD ASM Parts Listing ......... 116
viii ThinkPad 390E

Service Tools . . . . . . . . . . . . . . . . 118
Notices . . . . . . . . . . . . . . . . . . . . . 119
Trademarks . . . . . . . . . . . . . . . . . . 119
Contents ix

xThinkPad 390E