IBM THINKPAD 760XL 9546 User Manual

S82G-1503-05  
IBM Mobile Systems  
Hardware Maintenance Manual  
Volume 3: ThinkPad Computers  
March 1997  
We Want Your Comments!  
(Please see page 611)  
This Manual Supports:  
ThinkPad 365C/CD  
ThinkPad 365CS/CSD  
ThinkPad 365X/XD  
ThinkPad 380  
ThinkPad 385  
ThinkPad 560  
ThinkPad 760C/CD  
ThinkPad 760E/ED  
ThinkPad 760L/LD  
ThinkPad 760EL/ELD  
ThinkPad 760XL  
ThinkPad 760XD  
SelectaDock  
(2625)  
(2625)  
(2625)  
(2635)  
(2635)  
(2640)  
(9546)  
(9546)  
(9546)  
(9547)  
(9546)  
(9547)  
(3547)  
S82G-1503-05  
IBM Mobile Systems  
Hardware Maintenance Manual  
Volume 3: ThinkPad Computers  
March 1997  
We Want Your Comments!  
(Please see page 611)  
IBM  
Note  
Before using this information and the product it  
supports, be sure to read the general information  
under “Notices” on page 616.  
Sixth Edition (March 1997)  
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 WARRANTY OF ANY  
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT  
NOT LIMITED TO, THE IMPLIED WARRANTIES OF  
MERCHANTABILITY OR FITNESS FOR A PARTICULAR  
PURPOSE. Some states do not allow disclaimer of  
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 and/or changes in the product(s) and/or the  
program(s) described in this publication at any time.  
This publication was developed for products and services  
offered in the United States of America. IBM may not offer  
the products, services, or features discussed in this  
document in other countries, and the information is subject  
to change without notice. Consult your local IBM  
representative for information on the products, services,  
and features available in your area.  
Requests for technical information about IBM products  
should be made to your IBM reseller or IBM marketing  
representative.  
Copyright International Business Machines  
Corporation 1997. All rights reserved.  
Note to U.S. 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.  
ii IBM Mobile Systems - ThinkPad HMM Volume 3  
About This Manual  
This manual contains service and reference information for  
IBM ThinkPad 365, 380, 385, 560, 760, and SelectaDock  
products. Use this manual along with the advanced  
diagnostic tests to troubleshoot problems effectively.  
The manual is divided into sections as follows:  
Ÿ
The Introduction section provides general information,  
guidelines, and safety information required to service  
computers.  
Ÿ
Ÿ
The product-specific sections include service,  
reference, and product-specific parts information.  
The Common Devices Checkout section provides  
procedures for testing the devices that are commonly  
attached to ThinkPad computers.  
Ÿ
The Miscellaneous Information section contains  
information about acronyms, abbreviations, terms,  
and a telephone number listing.  
Important  
This manual is intended for trained servicers who are  
familiar with ThinkPad products. Use this manual  
along with the advanced diagnostic tests to  
troubleshoot problems effectively.  
Before servicing an IBM mobile product, be sure to  
review the safety information under “Safety Notices  
(Multi-lingual Translations)” on page 8 and “Safety  
Information” on page 15.  
iii  
Related Publications  
The following mobile product publications are available  
through IBM or your IBM Authorized Dealer.  
Publication  
Part, Form Number  
Mobile Systems HMM  
Volume 1: Laptop,  
30H2356, S82G-1501-01  
Notebook, Portable, and  
ThinkPad Computers  
(Models L40, CL57, N45,  
N51, P70/P75, ThinkPad  
300, 350, 500, 510, 710T,  
Expansion Unit, Dock I,  
Dock II)  
Mobile Systems HMM  
Volume 2: ThinkPad  
Computers  
30H2357, S82G-1502-03  
(Model 340, 355, 360, 370,  
700, 701, 720, 750, 755)  
ThinkPad 700 (9552) HMS  
ThinkPad 700 (9552) HMR  
ThinkPad 700C (9552) HMS  
ThinkPad 700C (9552) HMR  
42G2016, S42G-2016  
42G2015, S42G-2015  
42G2022, S42G-2022  
42G2021, S42G-2021  
61G1193, S61G-1193  
ThinkPad 720/720C (9552)  
HMS  
ThinkPad 720/720C (9552)  
HMR  
61G1187, S61G-1187  
ThinkPad 730T (2524) HMM  
82G5497, S82G-5497  
42G2338, S42G-2338  
ThinkPad Exp. Crtg. (3550)  
HMS  
ThinkPad Exp. Crtg. (3550)  
HMR  
42G2339, S42G-2339  
PS/2 FaxConcentrator HMS  
PS/2 FaxConcentrator HMR  
15F2262, S15F-2262  
84F8541, S84F-8541  
10G5993, S10G-5993  
PS/2 Comm. Cartridge I  
HMS  
PS/2 Comm. Cartridge I  
HMR  
10G5992, S10G-5992  
61G1556, S61G-1556  
IBM High Speed Internal,  
PCMCIA Data/Fax Modems  
iv IBM Mobile Systems - ThinkPad HMM Volume 3  
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  
76H7578, S30H-2498  
71G3702, S71G-3702  
83G8095, S83G-8095  
ThinkPad 365 (2625)  
Advanced Diagnostics  
Diskette  
ThinkPad 500 (2603)  
Advanced Diagnostics  
Diskette  
ThinkPad 510 (2604)  
Advanced Diagnostics  
Diskette  
ThinkPad 700 (9552)  
Reference Diskette  
42G2017, S42G-2017  
42G2023, S42G-2023  
61G1194, S61G-1194  
78H5384, S78H-5384  
ThinkPad 700C (9552)  
Reference Diskette  
ThinkPad 720/720C (9552)  
Reference Diskette  
ThinkPad Hardware  
Maintenance Diskette  
(for all Models 355, 360,  
560, 750, 755, 760)  
ThinkPad Dock I (3545)  
Docking Station (3550)  
Data/Fax Modem  
71G4140, S71G-4140  
42G2428, S42G-2428  
61G1556, S61G-1556  
84F8540, S84F-8540  
FaxConcentrator/A  
v
vi IBM Mobile Systems - ThinkPad HMM Volume 3  
Contents  
Introduction . . . . . . . . . . . . . . . . . . .  
Portable Computer Descriptions . . . . . . . . . .  
Drive and Diskette Compatibility Matrix . . . . . . .  
1
2
5
6
8
Important Service Information  
Safety Notices (Multi-lingual Translations)  
Safety Information  
Laser Compliance Statement  
Screw Size Chart . . . . . . . . . . . . . . . . . 22  
. . . . . . . . . . .  
. . . . .  
. . . . . . . . . . . . . . . . 15  
. . . . . . . . . . . 20  
ThinkPad 365 (2625)  
. . . . . . . . . . . . . . 25  
Read This First . . . . . . . . . . . . . . . . . . 27  
General Checkout . . . . . . . . . . . . . . . . . 30  
Symptom-to-FRU Index . . . . . . . . . . . . . . 41  
Related Service Procedures . . . . . . . . . . . . 50  
Diagnostic Test Programs . . . . . . . . . . . . . 52  
Using the Diagnostics Test Programs  
. . . . . . . 54  
Product Overview (365C, CD, CS, CSD) . . . . . . 58  
Product Overview (365E, ED) . . . . . . . . . . . 59  
FRU Removals and Replacements . . . . . . . . . 60  
Locations . . . . . . . . . . . . . . . . . . . . . 81  
Parts Listing 365C, CD, CS, CSD (2625)  
. . . . . 84  
Parts Listing 365E, ED (2625) . . . . . . . . . . . 87  
ThinkPad 365X, 365XD (2625) . . . . . . . . . . 91  
Read This First . . . . . . . . . . . . . . . . . . 93  
Checkout Guide  
. . . . . . . . . . . . . . . . . 96  
Symptom-to-FRU Index . . . . . . . . . . . . . 106  
Related Service Procedures . . . . . . . . . . . 117  
Product Overview (365X, 365XD) . . . . . . . . 126  
FRU Removals and Replacements . . . . . . . . 127  
Locations . . . . . . . . . . . . . . . . . . . . 164  
Parts Listing 365X, 365XD (2625) . . . . . . . . 170  
ThinkPad 380, 380D, 385, 385D (2635) . . . . . 183  
Read This First . . . . . . . . . . . . . . . . . 185  
Checkout Guide  
. . . . . . . . . . . . . . . . 189  
Symptom-to-FRU Index . . . . . . . . . . . . . 199  
Related Service Procedures . . . . . . . . . . . 210  
Product Overview (380, 380D, 385, 385D) . . . . 215  
FRU Removals and Replacements . . . . . . . . 216  
Locations . . . . . . . . . . . . . . . . . . . . 249  
Parts Listing 380/385 (2635)  
. . . . . . . . . . 252  
ThinkPad 560 (2640)  
Read This First . . . . . . . . . . . . . . . . . 265  
Checkout Guide . . . . . . . . . . . . . . . . 268  
. . . . . . . . . . . . . 263  
Symptom-to-FRU Index . . . . . . . . . . . . . 279  
Related Service Procedures . . . . . . . . . . . 291  
Product Overview (560) . . . . . . . . . . . . . 296  
FRU Removals and Replacements . . . . . . . . 297  
Locations . . . . . . . . . . . . . . . . . . . . 321  
Copyright IBM Corp. 1997  
vii  
Parts Listing 560 (2640) . . . . . . . . . . . . . 325  
ThinkPad 760 (9546, 9547)  
Read This First . . . . . . . . . . . . . . . . . 338  
Checkout Guide . . . . . . . . . . . . . . . . 341  
. . . . . . . . . . 335  
Symptom-to-FRU Index . . . . . . . . . . . . . 359  
Related Service Procedures . . . . . . . . . . . 372  
Product Overview (760) . . . . . . . . . . . . . 377  
FRU Removals and Replacements . . . . . . . . 382  
LCD Removal and Replacement . . . . . . . . . 427  
LCD Unit, 12.1 SVGA (P/N 29H9226, ASM P/N  
29H9029) . . . . . . . . . . . . . . . . . . . 428  
LCD Unit, 12.1 SVGA (P/N 29H9226, ASM P/N  
73H6599) . . . . . . . . . . . . . . . . . . . 433  
LCD Unit, 10.4 SVGA (P/N 29H9227)  
LCD Unit, 10.4 VGA (P/N 46H5355) . . . . . . . 444  
LCD Unit, 11.3 DSTN (P/N 39H6232) . . . . . . 449  
LCD Unit, 12.1 XGA . . . . . . . . . . . . . . 454  
LCD Unit, 12.1 SVGA (P/N 82H8496) . . . . . . 460  
. . . . . . 439  
LCD Unit, 12.1 SVGA (P/N 11J8867, ASM P/N  
11J8855) . . . . . . . . . . . . . . . . . . . 466  
LCD Unit, 12.1 SVGA (P/N 46H5725, ASM P/N  
46H5723) . . . . . . . . . . . . . . . . . . . 472  
Locations . . . . . . . . . . . . . . . . . . . . 478  
Parts Listing 760 (9546, 9547)  
. . . . . . . . . 483  
LCD Parts List . . . . . . . . . . . . . . . . . 520  
ThinkPad SelectaDock Docking System  
. . . . 547  
Read This First . . . . . . . . . . . . . . . . . 548  
General Preparation . . . . . . . . . . . . . . . 550  
Checkout Guide  
Printer . . . . . . . . . . . . . . . . . . . . . 554  
Running Diagnostics . . . . . . . . . . . . . . 559  
. . . . . . . . . . . . . . . . 551  
Symptom-to-FRU Index . . . . . . . . . . . . . 565  
Undetermined Problems . . . . . . . . . . . . . 573  
FRU Removals and Replacements . . . . . . . . 574  
Locations . . . . . . . . . . . . . . . . . . . . 583  
Parts Listing SelectaDock (3547)  
. . . . . . . . 588  
Common Devices Checkout . . . . . . . . . . 591  
External Diskette Drive Test . . . . . . . . . . . 592  
External Display Self-Test . . . . . . . . . . . . 592  
External Keyboard/Auxiliary Input Device Checkout  
Fax/Modem Checkout . . . . . . . . . . . . . . 594  
Printer Checkout . . . . . . . . . . . . . . . . 596  
593  
Port Replicator Checkout  
TrackPoint Checkout  
. . . . . . . . . . . . 597  
. . . . . . . . . . . . . . 598  
TV Tuner . . . . . . . . . . . . . . . . . . . . 599  
Common Parts Listing . . . . . . . . . . . . . 605  
Miscellaneous Information . . . . . . . . . . . 609  
Acronyms, Abbreviations and Terms . . . . . . . 609  
Send Us Your Comments! . . . . . . . . . . . . 611  
viii IBM Mobile Systems - ThinkPad HMM Volume 3  
Do You Need Technical References?  
. . . . . . 612  
Problem Determination Tips . . . . . . . . . . . 613  
Phone Numbers, U.S. and Canada . . . . . . . . 614  
Notices . . . . . . . . . . . . . . . . . . . . . 616  
Contents ix  
x
IBM Mobile Systems - ThinkPad HMM Volume 3  
Introduction  
Portable Computer Descriptions . . . . . . . . . .  
Drive and Diskette Compatibility Matrix . . . . . . .  
2
5
6
7
7
8
Important Service Information  
How to Use Error Messages  
. . . . . . . . . . .  
. . . . . . . . . .  
How to Read POST Error Messages  
Safety Notices (Multi-lingual Translations)  
. . . . . .  
. . . . .  
Safety Information  
General Safety  
. . . . . . . . . . . . . . . . 15  
. . . . . . . . . . . . . . . . 15  
Electrical Safety . . . . . . . . . . . . . . . . 16  
Safety Inspection Guide . . . . . . . . . . . . 17  
Handling Electrostatic Discharge-Sensitive Devices 19  
Grounding Requirements . . . . . . . . . . . . 19  
Laser Compliance Statement  
. . . . . . . . . . . 20  
Screw Size Chart . . . . . . . . . . . . . . . . . 22  
Copyright IBM Corp. 1997  
1
Portable Computer Descriptions  
Models N51, CL57, and P70/75 and Thinkpads 700x and  
720x are Micro Channel systems. All others are AT/ISA  
bus systems.  
Model  
Type  
Processor  
Memory Hrd Dsk  
Model L40SX  
Model N45 SL  
8543-044 386SX-20  
2614-065 386SL-25  
2614-067 386SL-25  
8551-025 386SLC-16  
8551-033 386SX-16  
8554-045 386SX-20  
8573-031 80386-16  
8573-061 80386-20  
8573-121 80386-20  
8573-161 80486-33  
8573-401 80486-33  
2615-065 386SL-25  
2615-067 386SL-25  
2M/18M  
2M/8M  
2M/8M  
2M/10M  
2M/10M  
2M/16M  
2M/8M  
60M  
80M  
120M  
80M  
40M  
80M  
Model N51 SLC  
Model N51 SX  
Model CL57 SX  
Model P70 386  
30M  
60M  
2M/8M  
2M/8M  
120M  
160M  
400M  
80M  
120M  
125M  
200M  
360M  
360M  
540M  
85M  
Model P75 486  
ThinkPad 300  
8M/16M  
8M/16M  
4M/12M  
4M/12M  
4M/12M  
4M/12M  
4M/12M  
4M/20M  
4M/20M  
4M/20M  
4M/20M  
4M/20M  
4M/20M  
4M/20M  
4M/16M  
4M/16M  
4M/16M  
2M/16M  
2M/16M  
4M/16M  
4M/16M  
4M/16M  
4M/16M  
4M/16M  
4M/16M  
4M/16M  
4M/16M  
4M/16M  
4M/16M  
4M/16M  
4M/16M  
4M/16M  
4M/16M  
8M/24M  
8M/24M  
8M/24M  
8M/24M  
8M/24M  
8M/24M  
8M/24M  
8M/24M  
8M/24M  
8M/24M  
8M/40M  
8M/40M  
8M/40M  
4M/32M  
4M/32M  
4M/32M  
ThinkPad 340  
2610  
2610  
2610  
2610  
2610  
486SLC2-50/25  
ThinkPad 340CSE  
ThinkPad 340CSE  
ThinkPad 345  
ThinkPad 345CS  
ThinkPad 350  
486SLC2-50/25  
486SLC2-66/33  
486DX4-75  
DX4-75  
2618-AOE 486SL-25  
2618-JOA 486SL-25  
2618-LOA 486SL-25  
2618-NOA 486SL-25  
2618-POA 486SL-25  
125M  
250M  
125M  
250M  
125M  
125M  
250M  
170M  
250M  
170M  
340M  
170M  
340M  
170M  
340M  
170M  
340M  
540M  
170M  
340M  
540M  
170M  
340M  
340M  
540M  
540M  
540M  
540M  
810M  
1.0G  
ThinkPad 350C  
ThinkPad 355  
ThinkPad 355C  
2619  
2619  
2619  
2619  
2619  
2620  
2620  
2620  
2620  
2620  
2620  
2620  
2620  
2620  
2620  
2620  
2620  
2620  
2620  
486SX-33  
486SX-33  
486SX-33  
486SX-33  
486SX-33  
486SX-33  
486SX-33  
486SX-33  
486SX-33  
486SX-33  
486SX-33  
486DX2-50/25  
486DX2-50/25  
486DX2-50/25  
486DX2-50/25  
486DX2-50/25  
486DX2-50/25  
486SX-33  
ThinkPad 355Cs  
ThinkPad 360  
ThinkPad 360C  
ThinkPad 360Cs  
ThinkPad 360Ce  
ThinkPad 360Cse  
ThinkPad 360P  
ThinkPad 365C  
486SX-33  
2625-205 486DX4-75  
2625-x05 486DX4-75  
ThinkPad 365E  
ThinkPad 365ED  
ThinkPad 365X/XD  
2625  
2625  
2625  
2625  
2625  
2625  
2625  
2625  
2625  
2625  
2625  
9545  
9545  
9545  
5x86-100/33  
5x86-100/33  
Pentium-100  
Pentium-100  
Pentium-100  
Pentium-120  
Pentium-120  
Pentium-120  
Pentium-133  
Pentium-133  
Pentium-133  
486DX4-75/25  
486DX4-75/25  
486DX4-75/33  
T
ThinkPad 365X/XD  
ThinkPad 365X/XD  
ThinkPad 370C  
540M  
810M  
1.0G  
810M  
1.0G  
1.3G  
340M  
540M  
810M  
C
M
P
Color  
Megabyte  
Pen  
Tablet  
ThinkPad File  
TPF  
2
IBM Mobile Systems - ThinkPad HMM Volume 3  
Model  
Type  
Processor  
Memory Hrd Dsk  
ThinkPad 380  
2635  
2635  
2635  
2635  
2635  
2635  
Pentium-150  
Pentium-150  
Pentium-150  
Pentium-150  
Pentium-150  
Pentium-150  
16M/48M  
16M/48M  
16M/48M  
16M/48M  
16M/48M  
16M/48M  
4M/12M  
4M/12M  
8M/40M  
8M/40M  
8M/40M  
8M/40M  
8M/40M  
8M/40M  
8M/40M  
8M/40M  
8M/40M  
4M/16M  
4M/16M  
4M/16M  
4M/32M  
4M/32M  
8M/32M  
8M/32M  
4M/32M  
4M/32M  
8M/32M  
8M/32M  
4M/12M  
4M/12M  
4M/12M  
4M/16M  
4M/16M  
4M/16M  
4M/12M  
4M/12M  
4M/20M  
4M/20M  
4M/20M  
4M/20M  
4M/20M  
4M/20M  
4M/20M  
4M/20M  
4M/20M  
4M/32M  
4M/32M  
4M/32M  
4M/32M  
4M/32M  
4M/32M  
8M/32M  
8M/32M  
8M/32M  
8M/32M  
8M/32M  
8M/32M  
8M/32M  
8M/32M  
8M/32M  
8M/32M  
8M/32M  
8M/32M  
8M/32M  
8M/32M  
8M/32M  
8M/32M  
1.08G  
1.35G  
2.10G  
1.08G  
1.35G  
2.10G  
80M  
170M  
540M  
810M  
1.0G  
540M  
810M  
1.0G  
540M  
810M  
1.0G  
ThinkPad 385  
ThinkPad 500  
ThinkPad 560  
2603-081 486SLC2-50/25  
2603-171 486SLC2-50/25  
2640  
2640  
2640  
2640  
2640  
2640  
2640  
2640  
2640  
Pentium-100  
Pentium-100  
Pentium-100  
Pentium-120  
Pentium-120  
Pentium-120  
Pentium-130  
Pentium-130  
Pentium-130  
ThinkPad 560  
ThinkPad 560  
ThinkPad 700  
9552-300 486SLC-25  
9552-301 486SLC-25  
9552-30B 486SLC-25  
80M  
120M  
120M  
360MB  
540MB  
360MB  
540MB  
360MB  
540MB  
360MB  
540MB  
TPF  
60M  
60M  
120M  
160M  
160M  
0M  
ThinkPad 700C  
ThinkPad 701C  
2630  
2630  
2630  
2630  
2630  
2630  
2630  
2630  
486DX2-25/50  
486DX2-25/50  
486DX4-25/75  
486DX4-25/75  
486DX2-25/50  
486DX2-25/50  
486DX4-25/75  
486DX4-25/75  
ThinkPad 701Cs  
ThinkPad 710T  
ThinkPad 720  
2523-09Y 486SLC2-25  
2523-302 486SLC2-25  
2523-303 486SLC2-25  
9552-307 486SLC-25/50  
9552-308 486SLC-25/50  
9552-30J 486SLC-25/50  
ThinkPad 720C  
ThinkPad 730T  
2524  
2524  
486SLC2-25  
486SLC2-25  
60M  
ThinkPad 750  
9545-006 486SL-33  
9545-008 486SL-33  
9545-306 486SL-33  
9545-308 486SL-33  
9545  
9545  
9545  
170M  
340M  
170M  
340M  
340M  
170M  
340M  
170M  
340M  
170M  
340M  
540M  
170M  
340M  
540M  
540M  
810M  
540M  
810M  
340M  
540M  
810M  
170M  
340M  
540M  
170M  
340M  
540M  
340M  
540M  
810M  
ThinkPad 750C  
ThinkPad 750Ce  
ThinkPad 750Cs  
P24S-50/25  
486SL-33  
486SL-33  
ThinkPad 750P  
ThinkPad 755C  
9545-40C 486SL-33  
9545-40E 486SL-33  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
9545  
486DX4-50/25  
486DX4-50/25  
486DX4-50/25  
486DX4-75/25  
486DX4-75/25  
486DX4-75/25  
486DX4-100/33  
486DX4-100/33  
486DX4-100/33  
486DX4-100/33  
486DX4-100/33  
486DX4-100/33  
486DX4-100/33  
486DX4-50/25  
486DX4-50/25  
486DX4-50/25  
486DX4-75/25  
486DX4-75/25  
486DX4-75/25  
486DX4-100/33  
486DX4-100/33  
486DX4-100/33  
T
ThinkPad 755CD  
ThinkPad 755CDV  
ThinkPad 755Ce  
ThinkPad 755Cs  
ThinkPad 755Cse  
C
M
P
Color  
Megabyte  
Pen  
Tablet  
ThinkPad File  
TPF  
Introduction  
3
Model  
Type  
Processor  
Memory Hrd Dsk  
ThinkPad 755CV  
9545  
9545  
9545  
9545  
9546  
9546  
9546  
9546  
9546  
9546  
9546  
9546  
9546  
9547  
9547  
9547  
9547  
9547  
9547  
9547  
9547  
9547  
9547  
9547  
9547  
9547  
9547  
9547  
9546  
9546  
9547  
9547  
486DX4-100/33  
486DX4-100/33  
486DX4-100/33  
486DX4-100/33  
Pentium-90  
8M/32M  
8M/32M  
8M/32M  
8M/32M  
8M/40M  
8M/40M  
8M/40M  
8M/40M  
8M/80M  
8M/80M  
8M/80M  
8M/80M  
8M/80M  
8M/80M  
8M/80M  
8M/80M  
8M/80M  
8M/80M  
8M/80M  
8M/80M  
8M/80M  
8M/80M  
8M/40M  
8M/40M  
8M/40M  
8M/40M  
8M/40M  
8M/40M  
32M/80M  
32M/80M  
16M/80M  
16M/80M  
540M  
810M  
540M  
810M  
360M  
720M  
810M  
1.2G  
810M  
1.0G  
1.2G  
1.3G  
2.1G  
810M  
1.0G  
1.2G  
810M  
1.0G  
1.2G  
810M  
1.0G  
1.2G  
810M  
1.1G  
1.2G  
810M  
1.1G  
1.2G  
3.0G  
3.0G  
2.1G  
3.0G  
ThinkPad 755CV  
ThinkPad 760C/CD  
Pentium-120  
Pentium-90  
Pentium-120  
Pentium-120  
Pentium-133  
Pentium-150  
Pentium-166  
Pentium-166  
Pentium-100  
Pentium-100  
Pentium-100  
Pentium-120  
Pentium-120  
Pentium-120  
Pentium-133  
Pentium-133  
Pentium-133  
Pentium-90  
ThinkPad 760E/ED  
ThinkPad 760EL/ELD  
ThinkPad 760L/LD  
Pentium-90  
Pentium-90  
Pentium-120  
Pentium-120  
Pentium-120  
Pentium-150  
Pentium-166  
Pentium-166  
Pentium-166  
ThinkPad 760X  
ThinkPad 760XD  
ThinkPad 760XL  
C
M
P
Color  
Megabyte  
Pen  
T
TPF  
Tablet  
ThinkPad File  
4
IBM Mobile Systems - ThinkPad HMM Volume 3  
Drive and Diskette Compatibility Matrix  
The following table provides identification information for  
3.5-inch drives.  
Diskette  
Drive  
Identifying  
Mark  
3.5-Inch - 1.44MB  
3.5-Inch - 2.88MB  
1.44 on the eject button  
2.88 on the eject button  
The following table provides compatibility information for  
3.5-inch diskettes and 3.5-inch diskette drives.  
Diskette  
Capacity  
1.44MB  
Drive  
2.88MB  
Drive  
1.0MB  
2.0MB  
4.0MB  
Read/Write  
Read/Write  
Not Compatible  
Read/Write  
Read/Write  
Read/Write  
The following table provides identification information for  
5.25-inch diskette drives.  
Diskette  
Drive  
Identifying  
Mark  
5.25-Inch - 360KB (External)  
5.25-Inch - 1.2MB (Internal)  
Asterisk on bezel  
1.2 on the eject button  
The following table provides compatibility information for  
5.25-inch diskettes and 5.25-inch diskette drives.  
Diskette  
Capacity  
360KB  
Drive  
1.2MB  
Drive  
360KB  
1.2MB  
Read/Write  
Not Compatible  
Read/Write  
Read/Write  
Note: A 360KB diskette written to or formatted on a  
1.2MB drive can be read reliably only on a 1.2MB  
drive.  
Introduction  
5
Important Service Information  
Important  
Diskette fixes are customer installable. The diskette  
fixes are located on the PC Company Bulletin Board  
Service (BBS). The direct phone line for modem  
connection is 919-557-0001 or tieline 255-0001.  
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 down-load information.  
The Canadian BBS phone numbers are:  
Montreal  
Toronto  
514-938-3022  
905-316-4255  
Vancouver 604-664-6464  
Winnipeg 204-934-2735  
FRU Replacement Strategy  
Before Replacing Parts  
Ensure that all diskette fixes are installed prior to  
replacing any FRUs listed in this manual.  
Use the following strategy to prevent unnecessary FRU  
replacement and service expense:  
Ÿ
If you are instructed to replace a FRU and that  
does not correct the problem, reinstall the original  
FRU before you continue.  
Ÿ
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 the first  
board that you replaced does not correct the problem,  
reinstall the original board, then replace the other  
(processor or system) board.  
Ÿ
If an adapter or device consists of more than one  
FRU, an error code may be caused by any of the  
FRUs. 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  
A customized setup configuration (other than default  
settings) may exist on the computer you are servicing.  
Running Automatic Configuration may alter those  
settings. Note the current configuration settings (using  
the View Configuration option) and verify that the  
settings are in place when service is complete.  
6
IBM Mobile Systems - ThinkPad HMM Volume 3  
The advanced diagnostic tests are intended to test only  
IBM products. Non-IBM products or modified options can  
give false errors and invalid responses.  
Hard Disk Drive Replacement Strategy:  
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 might have been changed. Be extremely  
careful during write operations such as copying,  
saving, or formatting. Data or programs can be  
overwritten if you select an incorrect drive.  
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. The cause of the  
first error code can result in false error codes being  
displayed. 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.  
How to Read POST Error Messages  
POST error messages are displayed on the screen as  
three, four, five, or eight digits. The error messages that  
can be displayed as shorter POST messages are  
highlighted in this index. Some digits will represent  
different information for SCSI errors versus non-SCSI  
errors.  
The following example shows which digits display the  
shorter POST error messages and also defines the SCSI  
information in an eight-digit error message.  
Shorter POST Messages  
┌────┬────┬────┬────┐  
┌────┬────┬────┬────┬────┬────┬────┬────┐  
│ ð │ ð │ ð │ ð │ ð │ ð │ ð │ ð │  
└────┴────┴────┴────┴────┴────┴────┴────┘  
Reserved │  
Size (SCSI)  
└────┴────┘  
Device Code  
Slot Number (SCSI)  
Logical Unit Number (SCSI)  
ID (SCSI)  
All SCSI devices are set to a different SCSI ID.  
Duplicate SCSI ID settings can generate a false error  
message. Use the SCSI ID to determine whether the error  
message is coming from an internal or an external device.  
Introduction  
7
Safety Notices (Multi-lingual  
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, or 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.  
8
IBM Mobile Systems - ThinkPad HMM Volume 3  
Safety Notice 2  
Some standby batteries contain a small amount of  
nickel and cadmium. Do not disassemble it, 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.  
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  
9
Safety Notice 3  
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.  
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.  
10 IBM Mobile Systems - ThinkPad HMM Volume 3  
Safety Notice 4  
The lithium battery can cause a fire, explosion, or  
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.  
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 bateria de repuesto es una bateria 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 11  
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.  
12 IBM Mobile Systems - ThinkPad HMM Volume 3  
Safety Notice 6  
To avoid shock, do not remove the plastic cover that  
surrounds the lower portion 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.  
Safety Notice 7  
Though main batteries have low voltage, a shorted or  
grounded battery can produce enough current to burn  
combustible materials or personnel.  
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.  
Introduction 13  
Safety Notice 8  
Before removing any FRU, power-off the computer,  
unplug all power cords from electrical outlets, remove  
the battery pack, 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.  
14 IBM Mobile Systems - ThinkPad HMM Volume 3  
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:  
Ÿ
Ÿ
Observe good housekeeping in the area of the  
machines during and after maintenance.  
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.  
Do not perform any action that causes hazards to the  
customer, or that makes the equipment unsafe.  
Before you start the machine, ensure that other  
service representatives and the customer's personnel  
are not in a hazardous position.  
Ÿ
Ÿ
Ÿ
Place removed covers and other parts in a safe  
place, away from all personnel, while you are  
servicing the machine.  
Ÿ
Ÿ
Keep your tool case away from walk areas so that  
other people will not trip over it.  
Do not wear loose clothing that can be trapped in the  
moving parts of a machine. Ensure that your sleeves  
are fastened or rolled up above your elbows. If your  
hair is long, fasten it.  
Ÿ
Ÿ
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.  
Do not wear jewelry, chains, metal-frame eyeglasses,  
or metal fasteners for your clothing.  
Attention: Metal objects are good electrical  
conductors.  
Ÿ
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.  
Ÿ
Ÿ
After service, reinstall all safety shields, guards,  
labels, and ground wires. Replace any safety device  
that is worn or defective.  
Reinstall all covers correctly before returning the  
machine to the customer.  
Introduction 15  
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.  
Ÿ
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.  
Ÿ
Ÿ
Do not work alone under hazardous conditions or  
near equipment that has hazardous voltages.  
Disconnect all power before:  
Performing a mechanical inspection  
Working near power supplies  
Removing or installing main units  
Ÿ
Ÿ
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.  
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: There must be a complete circuit to  
cause electrical shock. 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.  
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.  
16 IBM Mobile Systems - ThinkPad HMM Volume 3  
Ÿ
Regularly inspect and maintain your electrical hand  
tools for safe operational condition.  
Ÿ
Ÿ
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.  
Ÿ
Ÿ
Ÿ
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.)  
Ÿ
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 intent of this inspection guide is to assist you in  
identifying potentially unsafe conditions on these products.  
Each machine, as it was designed and built, had required  
safety items installed to protect users and service  
personnel from injury. This guide addresses only those  
items. However, good judgment should be used 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:  
Ÿ
Electrical hazards, especially primary power (primary  
voltage on the frame can cause serious or fatal  
electrical shock).  
Ÿ
Ÿ
Explosive hazards, such as a damaged CRT face or  
bulging capacitor  
Mechanical hazards, such as loose or missing  
hardware  
Introduction 17  
The guide consists of a series of steps presented in a  
checklist. 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 appropriate type  
as specified in the parts listings.  
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.  
18 IBM Mobile Systems - ThinkPad HMM Volume 3  
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:  
Ÿ
Keep the parts in protective packages until they are  
inserted into the product.  
Ÿ
Ÿ
Avoid contact with other people.  
Wear a grounded wrist strap against your skin to  
eliminate static on your body.  
Ÿ
Ÿ
Ÿ
Prevent the part from touching your clothing. Most  
clothing is insulative and retains a charge even when  
you are wearing a wrist strap.  
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.  
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.  
Introduction 19  
Laser Compliance Statement  
Some IBM Personal Computer models are equipped from  
the factory with a CD-ROM drive. CD-ROM drives are  
also sold separately as options. The CD-ROM drive is a  
laser product. The CD-ROM 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.  
When a CD-ROM drive 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  
20 IBM Mobile Systems - ThinkPad HMM Volume 3  
puede provocar la exposición a radiaciones  
peligrosas.  
Opening the CD-ROM drive could result in exposure to  
hazardous laser radiation. There are no serviceable parts  
inside the CD-ROM drive. Do not open.  
Some CD-ROM drives contain an embedded Class 3A or  
Class 3B laser diode. Note the following.  
DANGER:  
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  
Screw Size Chart  
Use the chart below to match the size and shape of the  
screws used in the computer you are servicing.  
A
B
Silver  
Black  
C
D
E
F
G
H
J
Silver  
Brass  
Black  
Black  
Black  
Brass  
Silver  
Brass  
Silver  
K
L
M
N
Silver  
Silver  
P
Black  
Brass  
Q
22 IBM Mobile Systems - ThinkPad HMM Volume 3  
Screw Size Chart (continued): Use the chart below  
to match the size and shape of the screws used in the  
computer you are servicing.  
R
S
Brass  
Black  
Brass  
Black  
T
U
V
W
X
Y
Brass  
Black  
Black  
Brass  
Z
Brass  
AA  
BB  
Black  
Brass  
CC  
DD  
Brass  
Black  
EE  
FF  
Black  
Silver  
Introduction 23  
Screw Size Chart (continued): Use the chart below  
to match the size and shape of the screws used in the  
computer you are servicing.  
GG  
HH  
JJ  
Silver  
Brass  
Silver  
Black  
KK  
LL  
Brass  
Brass  
MM  
NN  
PP  
QQ  
RR  
SS  
TT  
Silver  
Brass  
Brass  
Brass  
Brass  
Black  
UU  
Black  
WW  
Silver  
Black  
XX  
24 IBM Mobile Systems - ThinkPad HMM Volume 3  
ThinkPad 365 (2625)  
Read This First . . . . . . . . . . . . . . . . . . 27  
What to Do First . . . . . . . . . . . . . . . . 28  
General Checkout . . . . . . . . . . . . . . . . . 30  
Memory Checkout . . . . . . . . . . . . . . . 31  
Keyboard/Auxiliary Input Device Checkout . . . . 33  
TrackPoint III Checkout  
Audio Card Checkout  
Diskette Drive Checkout  
Power Systems Checkout  
. . . . . . . . . . . . 34  
. . . . . . . . . . . . . 34  
. . . . . . . . . . . . 34  
. . . . . . . . . . . 35  
Power Management Features  
. . . . . . . . . 38  
Setup Utility . . . . . . . . . . . . . . . . . . 40  
Symptom-to-FRU Index . . . . . . . . . . . . . . 41  
Beep Symptoms . . . . . . . . . . . . . . . . 41  
No Beep Symptoms . . . . . . . . . . . . . . 43  
Error Messages . . . . . . . . . . . . . . . . 44  
LCD Related Symptoms  
Keyboard/TrackPoint Related Symptoms  
. . . . . . . . . . . . 46  
. . . . 47  
Indicator Related Symptoms  
Power Related Symptoms  
Audio Related Symptoms  
. . . . . . . . . . 47  
. . . . . . . . . . . 47  
. . . . . . . . . . . 48  
Peripheral Device Related Symptoms . . . . . . 48  
Other Symptoms . . . . . . . . . . . . . . . . 48  
Intermittent Problems  
Undetermined Problems  
. . . . . . . . . . . . . 48  
. . . . . . . . . . . . 49  
Related Service Procedures . . . . . . . . . . . . 50  
System Status Indicators . . . . . . . . . . . . 50  
I/O Status Indicators . . . . . . . . . . . . . . 50  
How to Run Diagnostics  
. . . . . . . . . . . . 51  
Diagnostic Test Programs . . . . . . . . . . . . . 52  
Error Messages . . . . . . . . . . . . . . . . 53  
Return Codes . . . . . . . . . . . . . . . . . 53  
Using the Diagnostics Test Programs  
. . . . . . . 54  
Viewing the Test Groups . . . . . . . . . . . . 55  
Stopping the Tests . . . . . . . . . . . . . . . 56  
System Key Combinations . . . . . . . . . . . 57  
External Keyboard Key Combinations . . . . . . 57  
Product Overview (365C, CD, CS, CSD) . . . . . . 58  
Product Overview (365E, ED) . . . . . . . . . . . 59  
FRU Removals and Replacements . . . . . . . . . 60  
1010 Rear Connector Door  
1015 Foot . . . . . . . . . . . . . . . . . . 61  
1020 Battery Pack . . . . . . . . . . . . . . 62  
1030 SO-DIMM/Memory Board . . . . . . . . 63  
. . . . . . . . . . 61  
1040 Hard Disk Drive . . . . . . . . . . . . . 64  
1050 Keyboard Unit . . . . . . . . . . . . . . 65  
1055 Mylar Cover . . . . . . . . . . . . . . . 67  
1060 Processor Card  
. . . . . . . . . . . . . 68  
1065 LCD Inverter Card . . . . . . . . . . . . 69  
1068 LCD Panel  
1070 LCD Assembly  
. . . . . . . . . . . . . . . 70  
. . . . . . . . . . . . . 71  
1080 Sound Card . . . . . . . . . . . . . . . 72  
Copyright IBM Corp. 1997  
25  
1090 CD-ROM Drive  
. . . . . . . . . . . . . 73  
1100 Diskette Drive . . . . . . . . . . . . . . 74  
1110 DC/DC Card  
1120 Keyboard Card  
. . . . . . . . . . . . . . 75  
. . . . . . . . . . . . . 76  
1130 LED/IR Board . . . . . . . . . . . . . . 77  
1140 System Board . . . . . . . . . . . . . . 78  
1150 PCMCIA Assembly  
. . . . . . . . . . . 80  
Locations . . . . . . . . . . . . . . . . . . . . . 81  
System Front View . . . . . . . . . . . . . . . 81  
System Rear View . . . . . . . . . . . . . . . 82  
System Board Switch Settings  
Memory Board Switch Settings . . . . . . . . . 83  
Parts Listing 365C, CD, CS, CSD (2625) . . . . . 84  
. . . . . . . . . 83  
Parts Listing 365E, ED (2625) . . . . . . . . . . . 87  
26 IBM Mobile Systems - ThinkPad HMM Volume 3  
Read This First  
This hardware maintenance manual contains information  
for the IBM ThinkPad 365 computer.  
Ÿ
Be extremely careful during write operations such  
as copying, saving, or formatting. Drives in the  
computer that you are servicing might have been  
rearranged or the drive startup sequence might have  
been altered. If you select an incorrect drive, data or  
programs can be written over.  
Ÿ
Ÿ
Use only the correct FRUs. When you replace a  
FRU, make sure the model of the machine and FRU  
part number are correct by referring to the parts  
listing.  
FRUs should not be replaced because of a single,  
un-reproducible failure. Single failures can occur  
from a variety of reasons that have nothing to do with  
a hardware defect such as electrostatic discharge or  
software errors. FRU replacement should only be  
considered when a recurring problem exists.  
The servicer must include the following in the parts  
exchange form or part return form that is attached to the  
returned FRU.  
1. Name and phone number of servicer.  
2. Date of service.  
3. Date when part failed.  
4. Date of purchase.  
5. Failure symptoms, error codes appearing on  
display, and beep symptoms.  
6. Procedure index and page number in which  
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.  
ThinkPad 365 (2625) 27  
What to Do First  
Before servicing the computer, determine whether or not  
the damage applies to the warranty by referring to the  
following:  
Warranty Note  
During the warranty period, the customer may be  
responsible for repair costs if the 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  
could indicate that the system was subjected to stresses  
beyond normal use.  
Warranty Coverage Notes  
The following is not covered under warranty:  
Ÿ
LCD panel cracked from being dropped or  
applying too much force.  
Ÿ
Ÿ
Scratched (cosmetic) parts.  
Cracked or broken plastic parts, broken latches,  
broken pins or connectors caused by excessive  
force.  
Ÿ
Ÿ
Damage caused by liquid spilled onto the system.  
Damage caused by improperly inserting a  
PCMCIA card or installation of an incompatible  
card.  
Ÿ
Ÿ
Damage due to foreign material in the FDD or  
FDD bay.  
Damage to the diskette drive caused by pressing  
the diskette drive cover or inserting diskettes with  
multiple labels.  
Ÿ
Ÿ
Diskette eject button was bent or damaged.  
Damage to the CD-ROM drive caused by  
excessive force shocked or dropped.  
Fuse blown by attaching non-supported devices.  
Computer or hard disk could not be used  
because the password was forgotten.  
Ÿ
Ÿ
If the following symptoms are present, they could  
indicate the damage was caused by non-warranted  
activity:  
Ÿ
Ÿ
Ÿ
Missing parts can be a symptom of unauthorized  
service or modification.  
HDD spindles can become noisy if subjected to  
excessive force or if dropped.  
Errors can be caused by exposure to strong  
magnetic fields.  
28 IBM Mobile Systems - ThinkPad HMM Volume 3  
How to Use Error Messages: Use the error  
codes or messages displayed on the screen to diagnose  
failures. If more than one error code is displayed, begin  
the diagnosis with the first error code. The cause of the  
first error code can result in false error codes being  
displayed. If no error code is displayed, see if the error  
symptom is listed in the “Symptom-to-FRU Index” on  
page 41.  
How to Diagnose Multiple FRUs: When the  
adapter or device has more than one FRU, the error code  
could be caused by either FRU. Before replacing  
multiple-FRUs, try removing or exchanging each FRU, one  
by one in the designated sequence, to see if the symptoms  
change.  
Passwords: The Passwords are security features that  
are used to protect the system and the hard disk data from  
unauthorized access. There are two types of passwords:  
Ÿ
Ÿ
User Password  
Supervisor Password  
How to Disable the Passwords  
Important  
This information is not available in this online HMM  
format. See your IBM Servicer or IBM Authorized  
Dealer for this procedure.  
ThinkPad 365 (2625) 29  
General Checkout  
Use the following procedure as a guide for computer  
problems.  
Note: The diagnostic tests are intended to test only IBM  
products. Non-IBM products, prototype cards, or modified  
options can give false errors and invalid system responses.  
1. Obtain the failing symptoms in as much detail as  
possible. Pay close attention to the error messages  
on the screen.  
2. Verify the symptoms by attempting to recreate the  
failure by running the diagnostic test or by repeating  
the same operation.  
Note: To run the diagnostics, refer to “How to Run  
Diagnostics” on page 51.  
3. Use the following table to locate the description that  
best matches the symptom, then go to the page  
indicated.  
Symptom  
Go to  
AC Adapter  
“Checking the AC Adapter”  
on page 36.  
Audio Card  
“Audio Card Checkout” on  
page 34.  
Battery Pack  
“Checking the Battery Pack”  
on page 37.  
Configuration is not the  
same as the installed  
devices.  
“How to Run Diagnostics”  
on page 51.  
Diskette Drive  
“Diskette Drive Checkout”  
on page 34.  
Keyboard/Auxiliary Device  
(Mouse/Pointing Device)  
“Keyboard/Auxiliary Input  
Device Checkout” on  
page 33.  
Memory related problems  
Operational Charging  
“Memory Checkout” on  
page 31.  
“Checking Operational  
Charging” on page 37.  
Other symptoms.  
(Such as LCD problems.)  
“Symptom-to-FRU Index” on  
page 41, and then use  
other miscellaneous  
symptoms tables.  
Port Replicator  
“Port Replicator Power  
Overload” on page 40.  
POST does not complete.  
No beeps/error code are  
indicated.  
“Symptom-to-FRU Index” on  
page 41, and then use the  
No Beep Symptoms table.  
POST beeps, but no error  
codes are displayed.  
“Symptom-to-FRU Index” on  
page 41, and then use the  
Beep Symptoms table.  
30 IBM Mobile Systems - ThinkPad HMM Volume 3  
Symptom  
Go to  
POST detected an error and  
displayed numeric error  
codes.  
“Symptom-to-FRU Index” on  
page 41, and then use the  
Numeric Error Codes table.  
Power failure.  
(The power indicator does  
not go on or stay on.)  
“Power Systems Checkout”  
on page 35.  
Symptoms cannot be  
recreated.  
(Intermittent problems.)  
Use the customer reported  
symptoms and go to  
“Symptom-to-FRU Index” on  
page 41.  
TrackPoint III will not work  
“TrackPoint III Checkout” on  
page 34.  
Memory Checkout  
Depending on the model, the memory size that is available  
for customer use appears differently. See the following  
table for the available memory size of each card.  
System  
Board  
8MB  
Memory  
Board  
Optional  
SO-DIMM  
Extended  
Memory  
Switch  
Setting  
640KB  
8MB  
0
4
7168KB  
11264KB  
23552KB  
1,2,3,4  
OFF  
1,2,3,4  
OFF  
16  
2 ON  
1,3,4  
OFF  
640KB  
16MB  
0
4
15360KB  
19456KB  
31744KB  
1,2,3,4,  
OFF  
1,2,3,4  
OFF  
16  
2 ON  
1,3,4  
OFF  
Note: Refer to “Memory Board Switch Settings” on page 83  
for Memory Board Switch location.  
Memory errors might stop system operations, show error  
messages on the screen, or hang the system. The  
computer detects memory parity errors but does not  
correct them.  
Use the following procedure to isolate memory problems.  
Memory Error Notes  
Ÿ
Ÿ
Ignore any references to parity errors.  
Remove any installed PCMCIA memory cards.  
ThinkPad 365 (2625) 31  
1. Make sure that any memory options are fully installed  
into their connectors. A loose connection can cause  
an error.  
2. Run the diagnostics. See “How to Run Diagnostics”  
on page 51.  
3. If memory problems occur intermittently, use the loop  
option to repeat the test.  
4. FRUs should not be replaced because of a single,  
un-reproducible failure. Single failures can occur from  
a variety of reasons that have nothing to do with a  
hardware defect such as electrostatic discharge or  
software errors. FRU replacement should only be  
considered when a recurring problems exits.  
Flash Memory: BIOS, system setup programs, and  
some diagnostic utilities are stored in flash memory.  
Flash Memory Update: A flash memory update is  
required for new versions.  
When Updating Flash Memory  
During the flash update do not:  
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Power-off the computer.  
Disconnect the AC Adapter.  
Remove the battery.  
Lift the keyboard.  
Press any key.  
Attention  
On certain systems, updating flash memory can reset  
all customer’s configuration settings to the default  
values. The following steps bypass the CONFIG.SYS  
and AUTOEXEC.BAT files, so the customer’s  
configuration setting are not reset to the default  
values.  
To update the flash memory:  
1. Power-off the computer.  
2. Install the battery pack and connect the AC Adapter.  
3. Insert the update diskette in drive A.  
4. Power-on the computer.  
5. When the message “Starting PC DOS” appears,  
press F5 to bypass the CONFIG.SYS and  
AUTOEXEC.BAT.  
6. At the prompt, select Country Language then press  
Enter.  
7. Follow the instructions on the screen.  
32 IBM Mobile Systems - ThinkPad HMM Volume 3  
Keyboard/Auxiliary Input Device  
Checkout  
Disconnect the external keyboard and mouse, then try the  
internal keyboard. If the internal keyboard works correctly,  
replace the external keyboard or mouse.  
If the internal keyboard does not work correctly or an  
unexpected character appears, make sure that the three  
flexible cables extending from the keyboard are correctly  
seated in the connectors on the keyboard card.  
If the keyboard cables are seated correctly, run the  
Keyboard Test using the IBM ThinkPad 365 Advanced  
Diagnostics Diskette.  
Attention  
To use the IBM ThinkPad 365 Advanced Diagnostics  
Diskette, you must have at least 500KB of free  
memory. Be sure to read the “README.PO” file on  
the IBM ThinkPad 365 Advanced Diagnostics Diskette  
before using the following instructions.  
1. Power-off the computer.  
2. Insert the IBM ThinkPad 365 Advanced Diagnostics  
Diskette into drive A.  
3. Power-on the computer.  
4. Follow the instructions on the screen and proceed to  
the Main Menu. Allow two to four minutes for the  
diagnostic programs to load.  
5. At the Main Menu, select Diagnostics.  
6. At the Diagnostics Menu, select Module Tests.  
7. At the Module Tests Menu, select Keyboard.  
8. Press Enter to run the keyboard tests.  
9. Do not press any key until prompted, then follow the  
instructions on the screen.  
10. When the tests are completed, press Esc twice to  
return to the main menu.  
11. Select Exit.  
If the tests detect a keyboard problem, do the following  
one at a time to correct the problem. Do not replace a  
non-defective FRU.  
Ÿ
Ÿ
Ÿ
Ÿ
Reseat the three cables.  
Replace the keyboard.  
Replace the keyboard card.  
Replace the system board.  
The following auxiliary input devices are supported for this  
computer.  
Ÿ
Ÿ
Space-saver keyboard  
Mouse (PS/2 compatible)  
If any of the above devices do not work, reseat the cable  
connector and repeat the failing operation. If the problem  
ThinkPad 365 (2625) 33  
does not occur again, recheck the connector. If the  
problem remains, replace the device, and then the system  
board.  
TrackPoint III Checkout  
The TrackPoint automatically compensates to adjust the  
pointer sensor. During this process, the pointer moves on  
the screen automatically for a short time. This self-acting  
pointer movement can occur when a slight, steady  
pressure is applied to the TrackPoint pointer while the  
computer is powered on or while the system is running, or  
re-adjustment is required because the temperature has  
exceeded its normal temperature range. This symptom  
does not indicate a hardware problem. No service actions  
are necessary if the pointer movement stops in a short  
period of time.  
If either the pointing stick or the click button will not work,  
do the following actions one at a time to correct the  
problem. Do not replace a non-defective FRU.  
Ÿ
Ÿ
Ÿ
Ÿ
Reseat the three keyboard cables.  
Replace the keyboard.  
Replace the keyboard card.  
Replace the system board.  
Audio Card Checkout  
Do the following to run the audio tests.  
Ÿ
Go to a DOS full screen, press Ctrl+Alt+F11 to  
access the setup utility.  
Note: The setup screen can only be accessed at a  
full-screen DOS prompt.  
Ÿ
Use the arrow keys to select Audio, then use the  
space bar to toggle the audio selection to enabled  
(IRQ 7).  
Ÿ
Ÿ
Ÿ
Set the volume control to mid range.  
Press Esc then F4 to save and reboot.  
Listen for the sounds.  
If the audio card does not produces any sound during  
reboot, replace the Audio card. If the problem remains,  
replace the system board.  
Diskette Drive Checkout  
Important  
The ThinkPad 365 does not support both an internal  
and external drive simultaneously.  
Do the following to isolate the problem to a controller,  
drive, or diskette. A scratch, write enabled, non-defective  
2HD diskette is required. Make sure that the diskette does  
not have more than one label attached to it. Multiple  
labels can cause damage to the drive or can cause the  
drive to fail.  
34 IBM Mobile Systems - ThinkPad HMM Volume 3  
Use the following information to test the diskette drive.  
Attention  
To use the IBM ThinkPad 365 Advanced Diagnostics  
Diskette, you must have at least 500KB of free  
memory. Be sure to read the “README.PO” file on  
the IBM ThinkPad 365 Advanced Diagnostics Diskette  
before using the following instructions.  
1. Power-off the computer.  
2. Insert the IBM ThinkPad 365 Advanced Diagnostics  
Diskette into drive A.  
3. Power-on the computer.  
4. Follow the instructions on the screen and proceed to  
the Main Menu. Allow two to four minutes for the  
diagnostic programs to load.  
5. At the Main Menu, select Diagnostics.  
6. At the Diagnostics Menu, select Module Tests.  
7. At the Module Tests Menu, select Floppy Disks.  
8. Press Enter to run the Floppy Disks tests.  
9. Do not press any key until prompted, then follow the  
instructions on the screen.  
10. When the tests are completed, press Esc twice to  
return to the main menu.  
11. Select Exit.  
If the drive is attached through a Port Replicator and the  
test detects errors, move the drive to the computer's  
diskette drive connector directly, and test it again.  
Ÿ
Ÿ
If an error occurs replace the diskette drive.  
If no errors occur, the drive is not defective. Go to  
“Port Replicator Checkout” on page 597 to isolate the  
replicator problem.  
If the drive is attached through a Diskette Drive Attachment  
Unit, replace the unit.  
Power Systems Checkout  
To verify the symptom of the problem:  
1. Remove the port replicator (if attached), reconnect the  
AC Adapter, and replace the battery pack in the  
computer.  
If the computer power problem remains, do the following:  
2. Remove the battery pack, external diskette drive, and  
hard disk drive.  
3. Connect the AC Adapter and check that power is  
supplied.  
4. Connect one at a time, the external diskette drive,  
and hard disk drive and check that power is supplied  
from each power source.  
5. Disconnect the AC Adapter, remove the hard disk and  
diskette drive, and install the charged battery pack;  
then check that power is supplied by battery pack.  
ThinkPad 365 (2625) 35  
6. Remove the memory card and PCMCIA cards and  
check the power supply. Reinstall one at a time and  
check the power supply.  
7. Disconnect the AC Adapter. Remove the CD-ROM  
and Audio Card. Reinstall one at a time, connect the  
AC Adapter and check that power is supplied.  
If you suspect a power problem, see the appropriate power  
supply check listed below.  
Ÿ
Ÿ
Ÿ
Ÿ
“Checking the AC Adapter.”  
“Checking Operational Charging” on page 37.  
“Checking the Battery Pack” on page 37.  
“Port Replicator Power Overload” on page 40.  
Checking the AC Adapter: You are here  
because the computer fails only when the AC Adapter is  
used.  
Ÿ
If the power problem occurs only when the port  
replicator is used, replace the replicator.  
If the power-on indicator does not turn on, check the  
power cord of the AC Adapter for correct continuity  
and installation.  
Ÿ
Ÿ
If the operational charge does not work, go to  
“Checking Operational Charging” on page 37.  
Use the following procedure to check the adapter.  
1. Unplug the AC Adapter cable from the computer and  
measure the output voltage at the plug of the AC  
Adapter cable. See the following figure.  
Pin  
1
Voltage (V dc)  
+10.0 to +16.0  
Ground  
2
Ÿ
If the voltage is correct:  
Replace the DC/DC Card.  
If the problem remains, replace the system  
board.  
Ÿ
Ÿ
If the problem still is not corrected, go to  
“Undetermined Problems” on page 49.  
If the voltage is not correct, go to the next step.  
2. Unplug the AC Adapter cable from the ac power  
outlet and wait five minutes or longer to allow the  
over voltage protection circuit to be fully discharged  
and initialized.  
3. Plug the AC Adapter cable into the ac power outlet.  
36 IBM Mobile Systems - ThinkPad HMM Volume 3  
4. Measure the output voltage of the AC Adapter.  
5. If the voltage is still not correct, replace the AC  
Adapter.  
Note: An audible noise from the AC Adapter does not  
always indicate a defective adapter.  
Checking Operational Charging: To check  
operational charging, use a discharged battery pack or a  
battery pack that shows an amber battery status indicator  
when it is installed in the computer.  
Perform operational charging. If the battery status  
indicator turns orange and the battery charging indicator  
turns green within two minutes, replace the AC Adapter.  
Checking the Battery Pack: Battery charging will  
not start until the Fuel-Gauge shows that less than 90% of  
the total power remains; with this condition the battery  
pack will charge to 100% of its capacity. This protects the  
battery pack from being over-charged or having a  
shortened life.  
Before you perform the following procedure, be sure you  
have the correct battery pack for this model.  
1. Power-off the computer.  
2. Remove the battery pack and measure the voltage  
between battery terminals 2 (+) and 6 (). See the  
following figure.  
3. If the voltage is less than +7.2 V dc, the battery pack  
has been discharged or is defective. Recharge the  
battery. If the recharging does not work, go to Step 5  
on page 38 to check the charging circuit.  
If the voltage is still less than +7.2 V dc after the  
recharging, replace the battery.  
4. If the voltage is more than +7.2 V dc, measure the  
resistance between battery terminals 4 and 6. The  
resistance must be 4K ohms to 30K ohms.  
If the resistance is not correct, replace the battery  
pack.  
If the resistance is correct, replace the DC/DC card.  
ThinkPad 365 (2625) 37  
5. To check the charging circuit, do the following. Plug  
in the AC Adapter with the battery pack removed,  
then power-on the computer.  
6. Measure the charging voltage between DC/DC  
terminals 2 (+) and 6 ().  
7. If the voltage is less then +9.0 V dc, replace the  
DC/DC card. If the voltage is more than +9.0 V dc,  
the charging circuit is working correctly, replace the  
battery pack.  
Power Management Features  
Five power management modes are provided by the  
computer to save power consumption and prolong battery  
power.  
Standby Mode: When in standby mode the following  
occurs:  
Ÿ
Ÿ
Ÿ
The LCD backlight turns off.  
The hard disk motor stops.  
The CPU clock is set to the lowest speed.  
Events that cause entering of standby mode:  
Ÿ
Ÿ
Standby requested by the Fn key (Fn+F3).  
No activity under auto-standby enabled by the  
feature utility.  
Events that cause exiting or resuming of standby mode:  
Ÿ
Ÿ
(Resume) Any key operation.  
Ring wakeup if enabled.  
Suspend Mode: When in suspend mode, the  
following, in addition to the four actions of standby mode,  
occur:  
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
The Audio is powered-off  
The CD-ROM is powered off.  
The LCD power is powered-off.  
The hard disk is powered-off.  
The CPU is stopped.  
When the computer is powered with AC power and is used  
with one of the following IBM PC cards, the computer does  
not enter suspend or hibernate mode by either the LCD  
suspend switch or power-management timeout; the PC  
card and application program remain active.  
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
3270 Emulation Credit Card Adapter  
5250 Emulation Credit Card Adapter  
Token-Ring 16/4 Credit Card Adapter  
Credit Card Adapter for Ethernet  
IBM Modem  
In the following condition, the computer cannot enter the  
suspend mode.  
Ÿ
While the communication link is running.  
38 IBM Mobile Systems - ThinkPad HMM Volume 3  
Ÿ
Active interrupts (CD-ROM activity, etc.)  
Events that cause entering of suspend mode:  
Ÿ
Ÿ
Ÿ
Suspend mode is requested by the Fn key (Fn+F4).  
The LCD is closed.  
The specified time has elapsed from the last  
operation with the keyboard, mouse, hard disk drive,  
parallel connector, diskette drive, or the AC Adapter is  
plugged in. The time is specified by Suspend Timer  
in the setup program (if enabled).  
Ÿ
If the battery condition is low the system enters the  
Safe Suspend mode and the configuration/setup  
information is saved. If the battery gets to critical the  
battery power indicator blinks (amber) and the system  
goes into the Hibernation mode.  
Events that cause exiting or resuming of suspend mode:  
Ÿ
Ÿ
Ÿ
(Resume) The LCD is opened.  
(Resume) Real time clock alarm signaled.  
(Resume) Ring indicator (RI) signaled by serial or  
PCMCIA device.  
Ÿ
Ÿ
(Resume) Any keyboard key is pressed.  
(Exit) Timer conditions are satisfied to enter  
hibernation mode.  
Hibernation Mode: When in hibernation mode, the  
following occurs:  
Ÿ
The system status, RAM, VRAM, and setup data are  
stored on the hard disk.  
Ÿ
The system is powered-off.  
When the computer is powered with AC power and is used  
with one of the following IBM PC cards, the computer does  
not enter suspend or hibernate mode by either the LCD  
suspend switch or power-management timeout; the PC  
card and application program remain active.  
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
PCMCIA Data/FAX Modem  
High Speed PCMCIA Data/FAX Modem  
3270 Emulation Credit Card Adapter  
5250 Emulation Credit Card Adapter  
Token-Ring 16/4 Credit Card Adapter  
Credit Card Adapter for Ethernet  
ThinkPad 365 (2625) 39  
Events that cause entering of hibernation mode:  
Ÿ
The hibernation mode is requested by the Fn key  
(Fn+F12).  
Ÿ
Ÿ
Timer conditions are satisfied in suspend mode.  
Critical low battery condition. The system first goes  
into safe suspend mode, then when the battery  
reaches critical the system goes into the hibernation  
mode.  
Event that causes exiting of hibernation mode.  
The power-on switch is operated.  
Ÿ
When power is turned on, the hibernation history of the  
boot record on the hard disk is recognized and system  
status is restored from the hard disk to resume operation.  
Doze Mode: In the Doze mode, the system slows  
down the central processing unit and the system uses less  
power. Enable the doze mode in the setup program.  
Exiting the doze mode is instantaneous by pressing any  
keyboard key.  
Safe Suspend: Saves the computer state, then  
enters the suspend mode.  
Port Replicator Power Overload: If power shut  
downs occur intermittently when using a port replicator,  
suspect an over-current problem. Some devices use more  
power; if the maximum usage of each device occurs  
simultaneously, the total current will exceed the limit,  
thereby causing a power shut down. Isolate this problem  
by removing one of the devices, and use the computer  
under the same condition to see whether a power shut  
down occurs. Do this procedure for all devices, then  
determine the cause.  
Setup Utility  
Note  
The Setup Utility is ROM-resident and can only be  
started at a full-screen DOS prompt.  
Do the following to run the Setup Utility.  
1. Go to a DOS full screen.  
2. Press Ctrl+Alt+F11.  
3. Follow the instructions on the screen.  
Note  
When exiting the Setup Utility using Fn+6, press  
Ctrl+Alt together after returning to the full-screen  
DOS. This ensure the keyboard controller is in the  
proper reset state.  
40 IBM Mobile Systems - ThinkPad HMM Volume 3  
Symptom-to-FRU Index  
The Symptom-to-FRU Index lists error symptoms and  
possible causes. The most likely cause is listed first.  
Always begin with “General Checkout” on page 30. This  
index can also be used to help you decide which FRUs to  
have available when servicing a computer.  
If you are unable to correct the problem using this index,  
go to “Undetermined Problems” on page 49.  
Notes  
Ÿ
Ÿ
If you have both an error message and an  
incorrect audio response, diagnose the error  
message first.  
Check all power supply voltages before you  
replace the system board. (See “Power Systems  
Checkout” on page 35.)  
Beep Symptoms  
Beeps symptoms are short tones or a series of short tones  
separated by pauses (intervals without sound). See the  
following examples.  
Beep Symptom  
FRU/Action  
1-1-3  
1. Run Setup  
CMOS write/read test in  
progress or failure.  
2. System Board  
1-1-4  
1. System Board  
ROM BIOS check error.  
1-2-1  
1. System Board  
Programmable interval timer  
0 test in progress or failure.  
1-2-2  
1. System Board  
1. System Board  
1. System Board  
DMA channel 0 address and  
count register test in  
progress or failure.  
1-2-3  
DMA page register  
write/read in progress or  
failure.  
1-3-1  
RAM refresh verification test  
in progress or failure.  
1-3-3  
1. RAM Memory Board  
First 64K RAM chip or data  
line failure, multi-bit.  
2. System Board  
1-4-2  
1. System Board  
Parity failure first 64K RAM.  
1-4-3  
1. System Board  
Fail-safe timer failure (only  
used by EISA BIOS).  
ThinkPad 365 (2625) 41  
Beep Symptom  
FRU/Action  
1-4-4  
1. System Board  
Software NMI port failure  
(only used by EISA BIOS).  
2-1-1, 2-1-2, 2-1-3  
2-1-4, 2-2-1, 2-2-2  
2-2-3, 2-2-4, 2-3-1  
2-3-2, 2-3-4, 2-4-1  
2-4-2, 2-4-3, 2-4-4  
First 64K RAM chip or data  
line failure on bit x.  
1. RAM Memory Board  
2. System Board  
3-1-2  
1. System Board  
Master DMA register test in  
progress or failure.  
3-1-3  
1. System Board  
Master interrupt mask  
register test in progress or  
failure.  
3-1-4  
1. System Board  
Slave interrupt mask  
register test in progress or  
failure.  
3-2-4  
1. System Board  
2. Keyboard  
3. Keyboard Card  
Keyboard controller test in  
progress or failure.  
3-3-1  
1. System Board  
1. System Board  
1. System Board  
1. System Board  
1. System Board  
Slave DMA register test in  
progress or failure.  
3-3-4  
Screen memory test in  
progress or failure.  
3-4-1  
Screen initialization in  
progress.  
3-4-2  
Screen retrace test in  
progress.  
4-2-1  
Timer-tick interrupt test in  
progress or failure.  
4-2-2  
1. System Board  
Shutdown test in progress  
or failure.  
2. Processor Card  
4-2-3  
1. System Board  
Gate A20 failure.  
4-2-4  
1. System Board  
Unexpected interrupt in  
protected mode.  
2. Processor Card  
4-3-1  
1. RAM Memory Board  
2. SO DIMM  
3. System Board  
RAM test of memory above  
64K in progress or failure.  
42 IBM Mobile Systems - ThinkPad HMM Volume 3  
Beep Symptom  
FRU/Action  
4-3-2  
1. System Board  
Programmable interval timer  
channel 2 test in progress  
or failure.  
4-3-4  
1. System Board  
1. System Board  
1. System Board  
Real-time clock test in  
progress or failure.  
4-4-1  
Serial port test in progress  
or failure.  
4-4-2  
Parallel port test in progress  
or failure.  
4-4-3  
1. Processor Card  
Math coprocessor test in  
progress or failure.  
2. System Board  
No Beep Symptoms  
Symptom/Error  
FRU/Action  
No beep during POST but  
computer works correctly.  
1. System Board  
2. Audio card  
No beep during POST and  
no display.  
1. See “Undetermined  
Problems” on  
page 49.  
2. System Board  
3. Audio card  
4. Memory  
5. See “Power Systems  
Checkout” on page 35.  
ThinkPad 365 (2625) 43  
Error Messages  
Error Message/Symptom  
FRU/Action  
Bus Timeout NMI,  
Slot n. Type (S)hut off NMI,  
(R)eboot, other keys to  
continue.  
1. System Board  
Configuration for slot n.  
1. Run Setup Utility.  
Diskette drive failure  
1. See “Diskette Drive  
Checkout” on  
page 34.  
Diskette drive x failure  
where x=0 or x=1.  
1. See “Diskette Drive  
Checkout” on  
page 34.  
Diskette read failure -  
press F1 to retry boot (or  
may also say F2 for Setup  
Utility).  
1. Replace diskette with  
a bootable diskette  
and retry.  
Gate A20 failure  
1. System Board  
Hard disk configuration  
error  
1. Correct the hard disk  
configuration.  
Hard disk controller  
failure  
1. System Board  
Hard Disk failure  
1. Hard Disk  
Hard disk failure - press  
F1 to retry boot (or may  
also say press F2 for  
Setup Utility).  
1. Check drive selection  
in setup.  
2. Hard Disk.  
F2 to enter ROM-based  
SETUP  
1. Run Setup Utility.  
2. Verify Configuration.  
ID information mismatch  
1. Run Setup Utility.  
for slot n  
Invalid configuration  
1. Run Setup Utility.  
information.  
Internal cache test failed -  
1. Processor Card  
cache is disabled.  
2. System Board  
Keyboard clock line  
failure.  
1. Keyboard cable and  
Keyboard  
connection.  
2. System Board  
Keyboard controller  
1. System Board  
failure.  
Keyboard data line failure.  
1. System Board  
Keyboard is locked.  
1. Unlock the Keyboard  
Keyboard stuck key  
failure.  
1. Locate and fix.  
2. Keyboard cable and  
Keyboard connection.  
3. System Board  
Memory failure at  
1. RAM Memory Board  
hex-value, read hex-value,  
expecting hex-value.  
44 IBM Mobile Systems - ThinkPad HMM Volume 3  
Error Message/Symptom  
FRU/Action  
No boot device available -  
press F1 to reboot or  
press F2 for Setup Utility.  
1. Diskette  
2. Diskette Drive  
3. Hard Disk  
No boot sector on hard  
disk.  
1. Format the C drive.  
Press F1 to reboot or F2  
for Setup Utility.  
No fail safe timer NMI  
No software port NMI  
No timer tick interrupt  
1. System Board  
1. System Board  
1. System Board  
Not a boot diskette - press  
F1 to reboot or F2 for  
Setup Utility  
1. Replace diskette with  
a bootable diskette.  
Pointer device failure  
1. Check cable  
connections  
2. Keyboard (TrackPoint)  
3. External Mouse  
Real time clock failure  
Shutdown failure  
1. Run Setup Utility  
1. Power-off, Power-on,  
Retry  
2. System Board  
Time of day not set - run  
SETUP program  
1. Run Setup Utility  
Timer 2 failure  
1. System Board  
Unexpected HW interrupt  
at address Type (R)eboot,  
other keys to continue.  
Hardware problem. Not  
displayed if the extended  
interrupt handler is not  
enabled.  
1. System Board  
Unexpected interrupt in  
protected mode  
1. System Board  
Unexpected SW interrupt  
at address Type (R)eboot,  
other keys to continue.  
Error(s) in software  
1. System Board  
program. Not displayed if  
the extended interrupt  
handler is not enabled.  
Unexpected type 02  
interrupt at xxxxxh Type  
(S)hut off NMI, (R)eboot,  
other keys to continue.  
Parity error occurred. Cause  
undetermined.  
1. System Board  
Unresolved BUS Timeout  
NMI, Type (S)hut off NMI,  
(R)eboot, other keys to  
continue. Parity error  
occurred. Cause  
1. System Board  
2. Processor Card  
undetermined.  
ThinkPad 365 (2625) 45  
Error Message/Symptom  
FRU/Action  
Unresolved memory parity  
error  
1. System Board  
2. SO-DIMM  
Type (S)hut off NMI,  
(R)eboot, other keys to  
continue. Parity error  
occurred. Cause  
3. Optional Memory  
(8MB or 16MB Board)  
undetermined.  
xxxxxh Option ROM  
checksum failure where  
xxxxxh is the starting  
address of the option  
ROM  
1. Power-off, Power-on,  
Retry  
2. Peripheral Card  
LCD Related Symptoms  
Important  
The TFT LCD of the notebook computers contain over  
921000 thin film transistors (TFTs). A small number  
of missing, discolored or lighted dots (on all the time)  
is characteristic of TFT LCD technology. Excessive  
pixel problems can cause viewing concerns. The LCD  
should be replaced if the number of missing or  
discolored, or lighted dots in any colored background  
is 21 or more.  
Symptom/Error  
FRU/Action  
Ÿ
LCD backlight not  
working, or  
1. Reseat the LCD  
connectors.  
2. Inverter Card  
3. LCD Assembly  
4. Keyboard Card  
5. DC/DC Card  
Ÿ
Ÿ
LCD too dark, or  
LCD brightness cannot  
be adjusted, or  
Ÿ
LCD contrast cannot  
be adjusted.  
Ÿ
Ÿ
LCD screen  
unreadable, or  
Characters missing  
pels, or  
1. See the preceding  
important note.  
2. Reseat all LCD  
connectors.  
Ÿ
Ÿ
Screen abnormal, or  
Wrong color displayed.  
3. LCD Assembly  
4. System Board  
5. Keyboard Card  
LCD has extra horizontal or  
vertical lines displayed.  
1. LCD Assembly  
No beep, power-on indicator  
on, and a blank LCD during  
POST.  
1. System Board  
2. DC/DC Card  
3. Processor Card  
46 IBM Mobile Systems - ThinkPad HMM Volume 3  
Keyboard/TrackPoint Related  
Symptoms  
Symptom/Error  
FRU/Action  
Keyboard (one or more  
keys) does not work.  
1. Reseat the three  
keyboard cables.  
2. Keyboard  
3. Keyboard Card  
4. System Board  
TrackPoint does not work.  
1. Go to “TrackPoint III  
Checkout” on  
page 34.  
2. Keyboard  
3. Keyboard Card  
4. System Board  
Pointer moves automatically  
or does not work correctly.  
1. See “TrackPoint III  
Checkout” on  
page 34.  
Indicator Related Symptoms  
Symptom/Error  
FRU/Action  
Indicator incorrectly remains  
off or on, but system runs  
correctly.  
1. Reseat the status  
indicator cable.  
2. Status Indicator  
3. System Board  
Battery power status  
indicator blinks from green,  
yellow, to orange.  
1. Check that a correct  
battery is installed.  
2. Battery Pack  
3. DC/DC Card  
4. System Board  
Power Related Symptoms  
Symptom/Error  
FRU/Action  
Power shut down during  
operation.  
1. Go to “Power  
Systems Checkout”  
on page 35.  
2. Battery Pack  
3. Remove the battery  
pack and let it cool for  
two hours.  
4. DC/DC Card  
5. Power sources  
The system will not  
power-off.  
1. Remove AC Adapter.  
2. Remove the battery.  
3. Wait 10 seconds.  
4. Reconnect the AC  
Adapter and try to  
reproduce the error.  
5. If the error remains,  
replace the System  
Board.  
ThinkPad 365 (2625) 47  
Audio Related Symptoms  
The following are the audio input sources:  
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Line In  
Mic In  
System board  
CD-ROM  
Audio card  
Note: Use either a data or music CD to check the audio  
function. If the audio fails see “Audio Card Checkout” on  
page 34.  
Peripheral Device Related Symptoms  
Symptom/Error  
FRU/Action  
External display does not  
work correctly.  
1. See “External Display  
Self-Test” on  
page 592.  
Printer problems.  
1. Run Printer Self-test.  
2. System Board  
3. Parallel Port Device  
4. Cable  
Serial or parallel port device  
problems.  
1. Device  
2. Device Cable  
3. System Board  
Other Symptoms  
Symptom/Error  
FRU/Action  
Errors occur only when Port  
Replicator is used.  
1. See “Port Replicator  
Checkout” on  
page 597.  
PCMCIA slot pin is  
damaged.  
1. PCMCIA Socket  
2. System Board  
Note: If you cannot find a symptom or error in this list  
and the problem remains, see “Undetermined Problems”  
on page 49.  
Intermittent Problems  
Intermittent system hang problems can be caused by a  
variety of reasons that have nothing to do with a hardware  
defect such as: cosmic radiation, electrostatic discharge, or  
software errors. FRU replacement should only be  
considered when a recurring problems exits.  
When analyzing the intermittent problem, do the following:  
1. Run the diagnostic test for the system board in loop  
mode at least 10 times.  
2. If any error is detected, replace the FRU indicated.  
Rerun the test to verify that no more errors exist.  
48 IBM Mobile Systems - ThinkPad HMM Volume 3  
Undetermined Problems  
You are here because the diagnostic tests did not identify  
which adapter or device failed, installed devices are  
incorrect, a short circuit is suspected, or the system is  
inoperative. Follow the procedures below to isolate the  
failing FRU (do not isolate non-defective FRUs).  
Verify that all attached devices are supported by the  
computers.  
Verify that the power supply being used at the time of the  
failure is operating correctly. (See “Power Systems  
Checkout” on page 35.)  
1. Power-off the computer.  
2. Check the cables, wires, and connectors for short  
circuits and open circuits. Visually check them for  
damage. If any problems are found, replace the  
FRU.  
3. Remove or disconnect all of the following devices.  
a. Non-IBM devices  
b. Devices attached to external connectors  
c. Printer, mouse, and other external devices  
d. Battery pack  
e. Hard disk drive  
f. Diskette drive or the device attached to the  
diskette drive connector  
g. DIMM card  
h. CD-ROM  
i. Sound card  
j. Port replicator  
k. Keyboard  
l. Keyboard card  
Note: Remember that removing the hard disk  
drive, or any adapter or device, might cause  
configuration errors. Ignore error code 174.  
4. Power-on the computer.  
5. Determine if the problem has changed.  
6. If the problem does not occur again, 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 non-defective FRU.  
Ÿ
Ÿ
Ÿ
Ÿ
DC/DC card  
System board  
LCD assembly  
Processor card  
ThinkPad 365 (2625) 49  
Related Service Procedures  
This section provides information about the following:  
Ÿ
Ÿ
Ÿ
Ÿ
“System Status Indicators”  
“I/O Status Indicators”  
“How to Run Diagnostics” on page 51  
“System Key Combinations” on page 57  
System Status Indicators  
The system status indicators show the current computer  
status in different colors (amber and green).  
Symbol  
Color  
Meaning  
Blinking  
green  
Speaker sounds.  
Green  
Amber  
Battery fully charged.  
1 minute or less of battery  
power left.  
Green  
Off  
Battery charging.  
Battery charged. (Battery  
must be installed for proper  
reading.)  
Amber  
PC card in-use.  
Amber  
Amber  
Green  
Diskette drive in-use.  
Hard disk drive in-use.  
Keys in Num Lock mode.  
Green  
Keys in Caps Lock mode.  
Green  
Green  
Green  
Keys in Scroll Lock mode.  
Computer in suspend mode.  
Computer powered-on.  
I/O Status Indicators  
The I/O status indicators on the front panel of the CD-ROM  
drive or the FDD drive indicate the current status.  
I/O status  
Amber  
Green  
CD-ROM in use.  
Disk Drive in use.  
50 IBM Mobile Systems - ThinkPad HMM Volume 3  
How to Run Diagnostics  
The QAPlus/PRO diagnostic program, developed by  
DiagSoft for IBM, is the primary method of testing the  
computer. It is unique to the ThinkPad 365 and will not  
run on other models. You can use it to test the IBM  
components of the system and some external devices.  
The amount of time required to test all components  
depends on the number of components. The more  
optional adapters and devices you have attached to your  
system, the longer the testing takes.  
Important  
Before loading the diagnostics program:  
1. Go to a DOS full screen.  
2. Press Ctrl+Alt+F11 to go to the setup screen.  
3. Verify all peripherals devices are enabled.  
4. Page Down to the second page and verify all  
peripherals are enabled.  
The diagnostics program is intended to test only IBM  
products. Non-IBM products, prototype cards, or modified  
options can give false errors and invalid system responses.  
Loading the IBM ThinkPad 365 Advanced  
Diagnostics Diskette  
Attention  
The Advanced Diagnostics Diskette Version 1.0  
supports all ThinkPad 365C, CD, CS, CSD, E, and ED  
models. However, this diskette refers to all  
processors as DX4-100. If the diagnostics detect a  
processor error, refer to the “Parts Listing” to correctly  
identify the installed processor.  
To use the IBM ThinkPad 365 Advanced Diagnostics  
Diskette, you must have at least 500KB of free  
memory. Also, be sure to read the “README.PO” file  
on the Diagnostics Diskette.  
1. Power-off the computer.  
2. Insert the IBM ThinkPad 365 Advanced Diagnostics  
Diskette into drive A.  
3. Power-on the computer.  
4. Follow the instructions on the screen and proceed to  
the Main Menu. Allow two to four minutes for the  
diagnostic programs to load.  
5. At the Main Menu, select the test to run.  
6. Press Enter to run the test selected.  
7. After starting a test, do not press any key until  
prompted, then follow the instructions on the screen.  
8. When the test is completed, press Esc twice to return  
to the main menu.  
9. Select Exit.  
ThinkPad 365 (2625) 51  
Diagnostic Test Programs  
The diagnostics diskette outline follows:  
Main Menu:  
Ÿ
Diagnostics  
Quick Check  
When selected runs the system quick check  
diagnostics.  
Module Tests  
When selected displays a menu of the modules  
you can select to test.  
Options  
When selected displays a menu of test  
preferences, log results, and save script options.  
Ÿ
Ÿ
Ÿ
Ÿ
System info  
When selected displays a menu with selections  
for system information  
Reports  
When selected displays a list of the reports you  
can select.  
Utilities  
When selected displays a list of diagnostic  
utilities.  
Exit  
When selected exits diagnostics and returns you  
to the system prompt.  
52 IBM Mobile Systems - ThinkPad HMM Volume 3  
Error Messages  
Messages generated by the software—the operating  
system or application programs—generally are text  
messages, but they also can be numeric. The following  
are the various error messages.  
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
POST beep codes  
POST error messages  
Diagnostic error messages  
Software generated messages  
Multiple messages  
Error Message  
Description  
POST Beep Codes  
Sounds emitted from the  
speaker if POST finds a  
problem. One beep  
indicates POST completed  
successfully. Multiple  
beeps indicate a problem  
was found by the POST.  
POST Error Messages  
Displayed when POST  
detects hardware or  
configuration problems.  
Diagnostic Error Messages  
Displayed when a test  
program finds a hardware  
problem.  
Software Generated Error  
Messages  
Displayed if a problem or  
conflict is found by an  
application program, the  
operating system, or both.  
For an explanation of these  
messages, refer to the  
information supplied with  
that software package.  
Multiple Messages  
The first error that occurs  
can cause additional errors.  
Always follow the suggested  
action instructions for the  
first error message  
displayed.  
Return Codes  
For the test programs to properly determine if a test  
Passed, Failed, or Aborted, the test programs check the  
error-return code at test completion. To register the test  
properly in the test log, the test programs must generate  
one of the following return codes:  
Return Code  
Description  
0
Indicates device passed its test.  
Indicated device failed its test.  
Indicates test stopped or aborted.  
1
2 or greater  
ThinkPad 365 (2625) 53  
Using the Diagnostics Test Programs  
To load the IBM ThinkPad 365 Advanced Diagnostics  
Diskette, see “Loading the IBM ThinkPad 365 Advanced  
Diagnostics Diskette” on page 51.  
The test programs provide tests and utilities for users and  
service or support professionals to troubleshoot even the  
most difficult problems.  
You can maneuver within the test programs by typing the  
first letter of a menu choice, or using the TrackPoint III  
pointer.  
Throughout the test programs, pressing the first letter of an  
option on a menu is the same as moving to that item with  
the cursor and pressing Enter.  
Using the Function Keys  
Use the following keys to maneuver throughout the test  
programs:  
Keys  
Action  
Enter  
Select an item, run the test module, or  
run the test  
Down  
Moves the cursor down  
Arrow ()  
Up  
Moves the cursor up  
Arrow ()  
F1  
Calls up the appropriate Help  
information. Use the up arrow key ()  
or the down arrow key () to scroll  
through the information. Pressing F1  
from within a Help screen provides a  
help index from which you can select  
different categories. One of the  
important help categories is function  
key usage. Pressing Esc exits Help  
and returns to where you left off.  
Esc  
Go back to the previous menu.  
Additional functions are available in the Module Tests  
screen and the Test Group screen using the following  
keys:  
Keys  
Action  
Spacebar  
Toggle modules on/off (or toggle tests  
on/off)  
F2  
View test results log  
Local menu  
F10  
54 IBM Mobile Systems - ThinkPad HMM Volume 3  
Viewing the Test Groups  
As you move the cursor bar up or down in the Module  
Tests menu, the right hand screen changes to show the  
attributes, parameters, and the selected tests of the  
corresponding Test Group. The “DIAMOND” mark  
indicates a module selected for testing.  
Module Testing Mode  
If the Quick Check does not find a problem, or you want to  
perform in-depth testing, the Module Testing mode  
provides a method to run individual tests on a single  
module. For example, you can run an individual test for  
the diskette drive, or you can the test for all selected  
modules.  
To start the Module Tests:  
Attention  
To use the IBM ThinkPad 365 Advanced Diagnostics  
Diskette, you must have at least 500KB of free  
memory. Be sure to read the “README.PO” file on  
the IBM ThinkPad 365 Advanced Diagnostics Diskette  
before using the following instructions.  
1. Power-off the computer.  
2. Insert the IBM ThinkPad 365 Advanced Diagnostics  
Diskette into drive A.  
3. Power-on the computer.  
4. Follow the instructions on the screen and proceed to  
the Main Menu. Allow two to four minutes for the  
diagnostic programs to load.  
5. At the Main Menu, select Diagnostics.  
6. At the Diagnostics Menu, select Module Tests.  
7. At the Module Tests Menu, select the modules to test.  
8. Use the up and down arrow keys (and ) to move  
the highlight bar from one selection to the next.  
9. Press Enter to run the tests.  
10. Do not press any key until prompted, then follow the  
instructions on the screen.  
11. Follow the instructions on the screen.  
12. Select Exit.  
Running Selected Module Tests  
To run a selected tests for a test group:  
1. Use the up and down arrow keys (and ) to move  
the cursor to your selection.  
2. Press Enter.  
Note: A “DIAMOND” appears next to your selection.  
ThinkPad 365 (2625) 55  
Running All Selected Modules  
To run all selected test modules:  
1. Use the down arrow key () to move the cursor to the  
last choice, Run All Selected Modules.  
2. Press Enter.  
Note: A “DIAMOND” appears next to your selection.  
Changing Selected Tests in Test Groups  
To change selected tests in a Test Group:  
1. In the Module Tests Menu, use the up and down  
arrow keys (and ) to move the cursor to your  
selection.  
2. Scroll to the test you want to select or deselect.  
3. Press the spacebar at the highlighted test to toggle  
between select (indicated by a “DIAMOND”) and  
deselect.  
Note: Pressing the first letter of a test does not  
activate the test, unlike menu operation.  
4. Press Enter.  
Running an Individual Test  
To run an individual test:  
1. Use the up and down arrow keys (and ) to move  
to the highlighted bar to the test you want to run.  
2. Press Enter to run the test.  
Note: The results of the test appear in the  
lower-right-hand Test Log window. Also, if  
you enabled Test Logging, the results are  
recorded in the Test Log.  
3. When the test completes, press Esc to return to the  
Test Group Menu.  
Stopping the Tests  
To stop running a specific test or stop testing after you  
have started a test, press Esc while the test is running.  
The test pauses at the first possible opportunity, and the  
Skip/Abort Test Menu appears with the following options:  
Option  
Action  
Continue  
The test program begins testing where  
it left off.  
Skip to next test  
The test program skips the current test,  
but remaining tests for the selected  
Module Tests continue.  
Skip to next  
group  
The test program skips the remaining  
tests in the current test group.  
Abort all tests  
The test program stops and returns to  
the previous menu.  
56 IBM Mobile Systems - ThinkPad HMM Volume 3  
System Key Combinations  
The following table shows the system Fn key and function  
key combinations and their corresponding functions.  
The Fn key works independently from the operating  
system. The operating system obtains the status through  
the system management interface to control the system.  
Key  
Description  
Combinations  
Ctrl+Alt+F11  
Accesses the system setup screen  
from any full-screen DOS program.  
Fn+F2  
Displays the fuel gauge.  
Standby mode invocation.  
Suspend mode invocation.  
Toggles LCD/SIMUL/CRT.  
Toggles normal/reverse video.  
Hibernation mode invocation.  
Speaker enable.  
Fn+F3  
Fn+F4  
Fn+F7  
Fn+F8  
Fn+F12  
Fn+PgUp  
Fn+PgDn  
Speaker disable.  
External Keyboard Key Combinations  
The following table shows the external keyboard  
combinations used with the IBM ThinkPad Space Saver  
Keyboard.  
Key  
Description  
Combinations  
Ctrl+Alt+F2  
Ctrl+Alt+F4  
Ctrl+Alt+F7  
Ctrl+Alt+F12  
Ctrl+Alt+F11  
Fuel gauge display.  
Suspend Mode invocation.  
Toggles LCD/SIMUL/CRT.  
Hibernation invocation.  
Accesses setup and Power  
Management screens.  
Attention  
To avoid possible conflicts with certain software  
applications, you might need to disable these hot-key  
combinations. The Ctrl+Alt+Right-Shift-Key toggles  
the hot-keys On and Off for the external keyboard.  
ThinkPad 365 (2625) 57  
Product Overview (365C, CD, CS, CSD)  
The following provides an overview of the ThinkPad 365C,  
365CD, 365CS, and 365CSD system features.  
Feature  
Description  
Processor  
80486 DX4 75MHz  
AT/ISA Bus  
Bus  
Architecture  
Memory  
(Standard)  
Ÿ
Ÿ
8MB Memory Board  
16MB Memory Board  
Memory  
4MB, 8MB, or 16MB SO-DIMM  
(Optional)  
Memory  
24MB  
(Maximum)  
CMOS RAM  
Video  
128 Bytes  
Ÿ
Ÿ
1MB Video RAM  
TFT or DSTN LCD color, supports  
from 256 up to 65,536 colors.  
VGA (640 x 480 resolution)  
Brightness control  
Ÿ
Ÿ
Ÿ
Contrast control (DSTN Only)  
Diskette Drive  
1.44MB, 3.5-inch (Removable)  
1.44MB, 3.5-inch 3-Mode (Japan)  
Hard Disk  
Drive  
2.5-Inch (Removable)  
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
340MB Hard Disk Drive  
540MB Hard Disk Drive  
720MB Hard Disk Drive  
810MB Hard Disk Drive  
1.08GB Hard Disk Drive  
Optional  
CD-ROM  
5.25-Inch CD-ROM (2X) Drive  
(365CD, 365CSD Models Only)  
PCMCIA  
One Type-III  
or Two Type-II  
Keyboard  
85-key, 86-key, or 90-key  
TrackPoint  
12 Function Keys  
Audio  
16-Bit (365CD, 365CSD Only)  
Infrared (IR)  
IR Transceiver supports wireless file and  
data transfer.  
58 IBM Mobile Systems - ThinkPad HMM Volume 3  
Product Overview (365E, ED)  
The following provides an overview of the ThinkPad 365E  
and 365ED system features.  
Feature  
Description  
Processor  
IBM 5x86C 100MHz  
AT/ISA Bus  
Bus  
Architecture  
Memory  
(Standard)  
Ÿ
Ÿ
8MB Memory Board  
16MB Memory Board  
Memory  
(Option)  
4MB, 8MB, or 16MB SO-DIMM  
Memory  
24MB  
(Maximum)  
CMOS RAM  
Video  
128 Bytes  
Ÿ
Ÿ
1MB Video RAM  
TFT or DSTN LCD color, supports  
from 256 up to 65,536 colors.  
VGA (640 x 480 resolution)  
Brightness control  
Ÿ
Ÿ
Ÿ
Contrast control (DSTN Only)  
Diskette Drive  
1.44MB, 3.5-inch (removable)  
1.44MB, 3.5-inch 3-Mode (Japan)  
Hard Disk  
Drive  
2.5-inch (removable)  
Optional  
CD-ROM  
5.25-Inch CD-ROM (4X) Drive  
(365ED Model Only)  
PCMCIA  
One Type-III  
or Two Type-II  
Keyboard  
85-key, 86-key, or 90-key  
TrackPoint  
12 Function Keys  
Audio  
16-Bit (356ED Only)  
Infrared (IR)  
IR Transceiver supports wireless file and  
data transfer.  
ThinkPad 365 (2625) 59  
FRU Removals and Replacements  
This section contains information about removals and  
replacements.  
Ÿ
The system board is sensitive to, and can be  
damaged by, electrostatic discharge. Establish  
personal grounding by touching a ground point with  
one hand before touching these units.  
An electrostatic discharge (ESD) strap must be used  
to establish personal grounding.  
Ÿ
Ÿ
Do not damage any parts. Only certified, trained  
personnel should service the computer.  
The arrows in the “Removals and Replacements”  
section show the direction of movement to remove a  
FRU, or to turn a screw to release the FRU. The  
arrows are marked in numeric order, in square  
callouts, to show the correct sequence of removal.  
When other FRUs must be removed before removing  
the failing FRU, they are listed at the top of the page.  
To replace a FRU, reverse the removal procedure  
and follow any notes that pertain to replacement.  
See “Locations” for internal cable connections and  
arrangement information.  
Ÿ
Ÿ
Ÿ
When replacing a FRU, use the correct screw size as  
shown in the procedures.  
Safety Notice 1: Translation on page 8  
Before the computer is powered-on after FRU  
replacement, make sure all screws, springs, or 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 short circuits.  
Safety Notice 3: Translation on page 10  
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.  
Safety Notice 8: Translation on page 14  
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.  
60 IBM Mobile Systems - ThinkPad HMM Volume 3  
1010 Rear Connector Door  
Open the door, then push down on the center of the door  
to remove it.  
1015 Foot  
To replace the foot:  
Ÿ
Ÿ
Align the foot in the open position with one pivot pin  
in its hinge in the cover base.  
Press the other pivot pin into position by rotating the  
foot as shown.  
ThinkPad 365 (2625) 61  
1020 Battery Pack  
Ÿ
Ÿ
Ÿ
Ÿ
Disconnect the AC Adapter.  
Open the computer.  
Release the keyboard latches and raise the keyboard.  
Be careful the computer does not fall over backwards  
as you remove the battery.  
1
2
62 IBM Mobile Systems - ThinkPad HMM Volume 3  
1030 SO-DIMM/Memory Board  
Ÿ
Battery Pack (1020)  
To remove the optional SO-DIMM, release the latches as  
shown, then remove the SO-DIMM card.  
ThinkPad 365 (2625) 63  
1040 Hard Disk Drive  
Ÿ
Ÿ
Battery Pack (1020)  
Memory Board (1030)  
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 on the hard disk. Before  
removing the hard disk drive, have the user make a  
backup copy of all the information on the hard disk.  
Never remove the hard disk drive while the system is  
operating or is in suspend mode.  
1
64 IBM Mobile Systems - ThinkPad HMM Volume 3  
1050 Keyboard Unit  
Ÿ
Battery Pack (1020)  
2
Attention  
During removal and replacement procedures, pay  
special attention to the LCD Suspend Switch .2/. Be  
sure the LCD Suspend Switch actuator is properly  
aligned with the hole in the cover.  
Procedure continues on the following page.  
ThinkPad 365 (2625) 65  
1. Remove the plastic upper cover as shown.  
2. Lift the keyboard and locate the cables as shown.  
Attention  
The keyboard cables are fragile and can be damaged.  
Do not pull on the keyboard cables. Pull on the  
connectors only.  
Track Point III Cable  
Important  
Ÿ
When replacing the keyboard, check that the  
three cables are clean, and inserted straight and  
fully into the connectors.  
Ÿ
Ÿ
Test all keyboard keys before returning the  
computer to the customer.  
When replacing the top cover:  
Be sure the tabs on the back of the top  
cover are seated in the bottom of the LCD  
display  
Be sure the LCD Suspend Switch actuator is  
properly aligned with the hole in the cover.  
66 IBM Mobile Systems - ThinkPad HMM Volume 3  
1055 Mylar Cover  
Note  
The ThinkPad 365C, CD, CS, and CSD Model mylar  
cover is not secured with screws and can be easily  
removed after raising the keyboard.  
The ThinkPad 365E, ED Model mylar cover is secured  
with screws. The following procedure is for ThinkPad  
365E, ED Models only.  
Ÿ
Ÿ
Battery Pack (1020)  
Keyboard Unit (1050)  
1. Remove the two screw as shown.  
2. Carefully remove the mylar cover.  
Attention  
During removal and replacement procedures, make  
sure the Mylar Cover does not interfere with the LCD  
Suspend Switch.  
ThinkPad 365 (2625) 67  
1060 Processor Card  
Ÿ
Ÿ
Ÿ
Battery Pack (1020)  
Keyboard (1050)  
Mylar Cover (1055)  
68 IBM Mobile Systems - ThinkPad HMM Volume 3  
1065 LCD Inverter Card  
Ÿ
Battery Pack (1020)  
Note  
Screws shown above are 8 mm long.  
ThinkPad 365 (2625) 69  
1068 LCD Panel  
Ÿ
Battery Pack (1020)  
Note  
Screws shown above are 8 mm long.  
70 IBM Mobile Systems - ThinkPad HMM Volume 3  
1070 LCD Assembly  
Ÿ
Ÿ
Ÿ
Battery Pack (1020)  
Keyboard (1050)  
Mylar Cover (1055)  
Attention  
Make note of the location and placement of ground  
points and tape. Replace tape to its original position.  
Note  
Screws shown above are 6 mm long.  
Note  
Screws shown above are 8 mm long.  
ThinkPad 365 (2625) 71  
1080 Sound Card  
Ÿ
Ÿ
Ÿ
Ÿ
Battery Pack (1020)  
Keyboard (1050)  
Mylar Cover (1055)  
LCD Assembly (1070)  
Attention  
During replacement, make sure the microphone (A),  
speaker (B), and sound card (C) cable connections  
are correct.  
1
2
A
B
3
C
A
C
Note  
Screws shown above are 6 mm long.  
72 IBM Mobile Systems - ThinkPad HMM Volume 3  
1090 CD-ROM Drive  
Ÿ
Ÿ
Ÿ
Ÿ
Battery Pack (1020)  
Keyboard (1050)  
LCD Assembly (1070)  
Sound Card (1080)  
Attention  
During replacement, make sure that all connectors are  
properly aligned and seated.  
1
2
3
Note  
Screws shown above are 6 mm long.  
ThinkPad 365 (2625) 73  
1100 Diskette Drive  
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Battery Pack (1020)  
Keyboard (1050)  
Mylar Cover (1055)  
LCD Assembly (1070)  
Sound Card (1080)  
Attention  
During replacement, make sure that all connectors are  
properly aligned and seated.  
1
2
3
Note  
Screws shown above are 6 mm long.  
74 IBM Mobile Systems - ThinkPad HMM Volume 3  
1110 DC/DC Card  
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Battery Pack (1020)  
Keyboard (1050)  
Mylar Cover (1055)  
LCD Assembly (1070)  
Sound Card (1080)  
Attention  
During replacement, make sure the DC/DC Card  
connectors are properly aligned with the system board  
and fully seated.  
1
2
Note  
Screws shown above are 6 mm long.  
ThinkPad 365 (2625) 75  
1120 Keyboard Card  
Ÿ
Ÿ
Ÿ
Ÿ
Battery Pack (1020)  
Keyboard (1050)  
Mylar Cover (1055)  
LCD Assembly (1070)  
1. Disconnect all attached cable connectors.  
2. Release the locking tab at the right rear of the  
keyboard card.  
3. Remove the keyboard card.  
1
2
3
4
76 IBM Mobile Systems - ThinkPad HMM Volume 3  
1130 LED/IR Board  
Ÿ
Ÿ
Ÿ
Ÿ
Battery Pack (1020)  
Keyboard (1050)  
Mylar Cover (1055)  
LCD Assembly (1070)  
2
1
Note  
Screws shown above are 5 mm long.  
ThinkPad 365 (2625) 77  
1140 System Board  
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Battery Pack (1020)  
Memory Board (1030)  
Hard Disk Drive (1040)  
Keyboard Unit (1050)  
Mylar Cover (1055)  
LCD Assembly (1070)  
Sound Card (1080)  
Diskette Drive (1100)  
DC/DC Board (1110)  
Keyboard Card (1120)  
LED/IR Board (1130)  
Attention  
The system board fits very tightly in the bottom cover.  
Pay special attention to the PCMCIA eject buttons,  
audio connectors, and I/O connectors when removing  
and replacing the system board.  
2
1
Note  
Screws shown above are 6 mm long.  
Procedure continues on the following page.  
78 IBM Mobile Systems - ThinkPad HMM Volume 3  
Important  
If you replace the system board FRU, do the following  
to update the system setup program.  
1. Power-on the computer.  
2. Go to a DOS full screen.  
3. Press Ctrl+Alt+F11 to access the setup screen.  
4. Use the arrow keys to select Personalization.  
5. Press Tab to edit.  
6. At the Greeting screen, type in the required  
information.  
7. Press F3 to save.  
8. Press Esc to access Exiting Setup.  
9. Press F4 to save settings and reboot.  
ThinkPad 365 (2625) 79  
1150 PCMCIA Assembly  
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Battery Pack (1020)  
Memory Board (1030)  
Hard Disk Drive (1040)  
Keyboard Unit (1050)  
LCD (1060)  
Sound Card (1080)  
CD-ROM (1090)  
Diskette Drive (1100)  
DC/DC Board (1110)  
Keyboard Card (1120)  
LED/IR (1130)  
System Board Assembly (1140)  
Note  
Screws shown above are 6 mm long.  
80 IBM Mobile Systems - ThinkPad HMM Volume 3  
Locations  
System Front View  
.1/ Color LCD Screen  
.2/ Contrast Control  
.3/ Brightness Control  
.4/ Status Indicator  
.5/ Built in Microphone  
.6/ LCD Suspend Switch  
.7/ PCMCIA Release Levers  
.8/ PCMCIA Slots  
.9/ Locking Device Keyhole  
.1ð/ LCD and Keyboard Latch  
.11/ Keyboard  
.12/ Click Buttons  
.13/ CD-ROM or Diskette Drive  
.14/ Mechanical CD-ROM Eject Button  
.15/ Electronic CD-ROM Eject Button  
.16/ Fn Key  
.17/ TrackPoint  
.18/ Speaker Volume Control  
.19/ Built in Speaker  
2
5  
1
ThinkPad 365 (2625) 81  
System Rear View  
.1/ LCD and Keyboard Latch  
.2/ Power Switch  
.3/ Microphone/Line-In Jack  
.4/ Line-in Jack  
.5/ Line-out Headphone Jack  
.6/ Power Jack  
.7/ MIDI/Joystick Port  
.8/ External Diskette Drive Connector  
.9/ Parallel Connector  
.1ð/ Infrared (IR) Port  
.11/ Serial Connector  
.12/ Rear Door  
.13/ External Display Connector  
.14/ External Keyboard/Mouse Connector  
.15/ Port Replicator Connector  
1
82 IBM Mobile Systems - ThinkPad HMM Volume 3  
System Board Switch Settings  
4
3
2
1
IBM 5X86  
DX4-75  
N/A  
3.4V  
3.45V  
3.6V  
Default  
Memory Board Switch Settings  
S1  
S1  
ThinkPad 365 (2625) 83  
Parts Listing 365C, CD, CS, CSD (2625)  
1
1a  
1b  
1c  
1d  
2
17  
4
4a  
3
5
6
16  
7
8
15  
9
10  
14  
13  
12  
11  
84 IBM Mobile Systems - ThinkPad HMM Volume 3  
System Unit - ThinkPad 365C, CD, CS, CSD Only  
Important  
The following FRUs are for ThinkPad 365C, CD, CS,  
and CSD models only. For ThinkPad 365E and  
365ED models, see “Parts Listing 365E, ED (2625)”  
on page 87.  
Index FRU  
1
LCD Assembly, 10.4-Inch DSTN  
75H7620  
(LCD Cover Kit, Panel, Inverter, Cable)  
1a LCD Cover Kit, 10.4-Inch DSTN  
1b LCD Panel, 10.4-Inch DSTN  
1c Inverter Board, 10.4-Inch DSTN  
1d Cable Assembly, 10.4-Inch DSTN  
41H9818  
41H7463  
42H4049  
42H4051  
75H7621  
1
LCD Assembly, 10.4-Inch TFT  
(LCD Cover Kit, Panel, Inverter, Cable)  
1a LCD Cover Kit, 10.4-Inch TFT  
1b LCD Panel, 10.4-Inch TFT  
1c Inverter Board, 10.4-Inch TFT  
1d Cable Assembly, 10.4-Inch TFT  
- Order FRU 75H7621  
41H9819  
41H7464  
42H4055  
NA  
2
3
Keyboard (U.S. Only)  
Mylar Cover  
41H9789  
- See “Base Assembly (with Parts Kit)”  
8MB Memory Board  
Memory Board Insulated Bracket (10)  
4MB RAM Card (SO-DIMM)  
4
88G1262  
75H7624  
92G7290  
92G7296  
41H7436  
4a  
4a 16MB RAM Card (SO-DIMM)  
5
6
Keyboard Card  
Hard Disk Drive  
- 340MB Hard Disk Drive  
- 540MB Hard Disk Drive  
- 720MB Hard Disk Drive  
- 810MB Hard Disk Drive  
- 1.08GB Hard Disk Drive  
PCMCIA Socket Assembly  
Processor, 80486-DX4 75MHz  
System Board (with PCMCIA Socket)  
- 512K VRAM System Board  
- 1MB VRAM System Board  
Battery Pack  
02K0485  
02K0486  
85G8371  
07H0392  
39H2221  
75H7622  
88G1249  
7
8
9
76H2986  
76H2984  
41H7438  
76H3079  
75H7609  
10  
11  
Lower Cover Assembly  
Lower Cover Rubber Feet (2)  
DASD Devices  
12  
- Internal Diskette Drive Assembly  
- External Diskette Drive with Cable  
- CD-ROM (2X) Drive  
Volume Control Card  
LED/IR Board  
41H7444  
75H7572  
41H7446  
41H7434  
41H7443  
41H7433  
41H7449  
41H7437  
75H7573  
85G6698  
25H2207  
75H7576  
13  
14  
15  
16  
16  
17  
DC/DC Board  
Sound Card (16-Bit)  
Sound Card (No Audio)  
Upper Cover (with Screws, Gasket)  
AC Adapter (35W Universal)  
AC Power Cord (6-Inch - U.S.)  
Game Port Cable  
ThinkPad 365 (2625) 85  
Index FRU  
Base Assembly (With Parts Kit)  
41H7432  
- Upper Cover Bracket with Speaker,  
- Power Switch Knob, Power Bracket,  
- Support Bracket, Misc. Rubber Parts.  
- TrackPoint Caps (2), IR Lens  
Plastic Door/Bezel Package  
41H7452  
75H7575  
- PCMCIA, I/O, Modem, CD-ROM, FDD  
- Replicator, Misc. Rubber Parts  
Flat Plastic Cable Kit  
- DSTN, TFT, CD-ROM, Internal FDD  
Replicator Base Assembly  
Replicator Cable Cover  
Mini-Replicator Assembly  
Miscellaneous Parts/Screws Kit  
41H7457  
41H7458  
75H7528  
41H7456  
- CD-ROM Removal Pin, Washers, Hex Nuts,  
- Misc. Rubber Parts, Various Mylar Pieces,  
- Keyboard Knobs, Power Knob, Rubber Pads  
- Diskette Drive Brackets, Hard Disk Brackets  
- Memory Board Bracket, Power Bracket  
- Screw M2.5x3.5 (4), Screw M2x4 (6),  
- Screw M3x4 (4), Screw M3x6 (4)  
- Screw M2x15 (2), Screw M2x7 (4)  
- Screw M2x5 pan (16), Screw M3x6 pan (4)  
- Screw M3x6 binding (4)  
TrackPoint Cap Kit  
84G6536  
86 IBM Mobile Systems - ThinkPad HMM Volume 3  
Parts Listing 365E, ED (2625)  
1
1a  
1b  
1c  
1d  
2
17  
4
4a  
3
5
6
16  
7
8
15  
9
10  
14  
13  
12  
11  
ThinkPad 365 (2625) 87  
System Unit - ThinkPad 365E, 365ED Only  
Important  
The following FRUs are for ThinkPad 365E and  
365ED models only. For ThinkPad 365C, CD, CS,  
and CSD models, see “Parts Listing 365C, CD, CS,  

Nokia 6086 User Manual
Motorola MOTO W396 User Manual
LG Electronics P500H User Manual
LG Electronics GB210 User Manual
Kenwood KDC 222S User Manual
JVC KD S31 User Manual
JVC KD R302 User Manual
DeLonghi BCO110 User Manual
Craftsman 987799601 User Manual
Bunn B10Series User Manual