Toshiba Portege M780 User manual

[CONFIDENTIAL]
Toshiba Personal Computer
PORTEGE M780 Maintenance Manual
First edition January 2010
TOSHIBA CORPORATION
File Number 960-809

ii [CONFIDENTIAL] PORTEGE M780 Maintenance Manual (960-809)
Copyright
© 2010 by Toshiba Corporation. All rights reserved. Under the copyright laws, this manual
cannot be reproduced in any form without the prior written permission of Toshiba. No patent
liability is assumed with respect to the use of the information contained herein.
Toshiba Personal Computer TECRA A11/S11/P11/Satellite Pro S500 Series Maintenance Manual
First edition January 2010
Disclaimer
The information presented in this manual has been reviewed and validated for accuracy. The
included set of instructions and descriptions are accurate for the PORTEGE M780 at the time of
this manual's production. However, succeeding computers and manuals are subject to
change without notice. Therefore, Toshiba assumes no liability for damages incurred
directly or indirectly from errors, omissions, or discrepancies between any succeeding
product and this manual.
Trademarks
IBM is a registered trademark and IBM PC is a trademark of International Business
Machines Corporation.
Intel, Intel SpeedStep, Intel Core, Celeron and Centrino are trademarks or registered
trademarks of Intel Corporation.
Windows, Microsoft and Windows Vista are either registered trademarks or trademarks of
Microsoft Corporation.
Bluetooth is a trademark owned by its proprietor and used by TOSHIBA under license.
InterVideo and WinDVD are registered trademarks of InterVideo Inc.
Photo CD is a trademark of Eastman Kodak.
i.LINK is trademark and registered trademark of Sony Corporation.
Other trademarks and registered trademarks not listed above may be used in this manual.

PORTEGE M780 Maintenance Manual (960-809) [CONFIDENTIAL] iii
Preface
This maintenance manual describes how to perform hardware service maintenance for the
Toshiba Personal Computer PORTEGE M780
The procedures described in this manual are intended to help service technicians isolate
faulty Field Replaceable Units (FRUs) and replace them in the field.
SAFETY PRECAUTIONS
Four types of messages are used in this manual to bring important information to your
attention. Each of these messages will be italicized and identified as shown below.
DANGER: “Danger” indicates the existence of a hazard that could result in death or
serious bodily injury, if the safety instruction is not observed.
WARNING: “Warning” indicates the existence of a hazard that could result in bodily
injury, if the safety instruction is not observed.
CAUTION: “Caution” indicates the existence of a hazard that could result in property
damage, if the safety instruction is not observed.
NOTE: “Note” contains general information that relates to your safe maintenance
service.
Improper repair of the computer may result in safety hazards. Toshiba requires service
technicians and authorized dealers or service providers to ensure the following safety
precautions are adhered to strictly.
Be sure to fasten screws securely with the right screwdriver. If a screw is not fully
fastened, it could come loose, creating a danger of a short circuit, which could cause
overheating, smoke or fire.
If you replace the battery pack or RTC battery, be sure to use only the same model
battery or an equivalent battery recommended by Toshiba. Installation of the wrong
battery can cause the battery to explode.

iv [CONFIDENTIAL] PORTEGE M780 Maintenance Manual (960-809)
The manual is divided into the following parts:
Chapter 1 Hardware Overview describes the PORTEGE M780 system unit and
each FRU.
Chapter 2 Troubleshooting Procedures explains how to diagnose and resolve
FRU problems.
Chapter 3 Test and Diagnostics describes how to perform test and diagnostic
operations for maintenance service.
Chapter 4 Replacement Procedures describes the removal and replacement of the
FRUs.
Appendices The appendices describe the following:
Handling the LCD module
Board layout
Pin assignments
Keyboard scan/character codes
Key layout
Wiring diagrams
BIOS rewrite procedures
EC/KBC rewrite procedures
Reliability

PORTEGE M780 Maintenance Manual (960-809) [CONFIDENTIAL] v
Conventions
This manual uses the following formats to describe, identify, and highlight terms and
operating procedures.
Acronyms
On the first appearance and whenever necessary for clarification acronyms are enclosed in
parentheses following their definition. For example:
Read Only Memory (ROM)
Keys
Keys are used in the text to describe many operations. The key top symbol as it appears on
the keyboard is printed in boldface type.
Key operation
Some operations require you to simultaneously use two or more keys. We identify such
operations by the key top symbols separated by a plus (+) sign. For example, Ctrl + Pause
(Break) means you must hold down Ctrl and at the same time press Pause (Break). If
three keys are used, hold down the first two and at the same time press the third.
User input
Text that you are instructed to type in is shown in the boldface type below:
DISKCOPY A: B:
The display
Text generated by the computer that appears on its display is presented in the type face
below:
Format complete
System transferred