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ThinkPad Computer
Hardware Maintenance Manual
July 2005
This manual supports:
ThinkPad T43/T43p
(MT 2668/2669/2678/2679/
ThinkPad Dock II (MT 2877)
2686/2687
)

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Summarization of Contents

Introduction to ThinkPad Maintenance
Important Service Information
Key notes for service personnel, including BIOS/driver updates and customer support contacts.
Strategy for Replacing FRUs
Guidelines for efficient and correct FRU replacement procedures to prevent unnecessary expense.
Using Error Messages for Diagnosis
Guidance on diagnosing failures using displayed error codes or symptoms.
FRU Identification for CTO, CMV, GAV Products
Details resources (PEW, eSupport, HMM) for identifying FRUs for specific configurations.
RoHS Compliant FRU Replacement
Explains RoHS compliance and replacement requirements for parts.
Safety Information and Precautions
General Safety Guidelines
Rules for general safety during maintenance, including lifting and housekeeping.
Electrical Safety Procedures
Rules for working safely with electrical components and power sources.
Handling Electrostatic Discharge Sensitive Devices
Procedures to prevent ESD damage to components during handling.
Laser Compliance Statement
Compliance information for optical drives with Class 1 laser products.
General Descriptions and Procedures
Read This First Section
Important notes and checks before proceeding to checkout procedures.
Password Management
Explanation of Power-on, Hard-disk, and Supervisor passwords and their management.
Power Management Modes
Explanation of screen blank, standby, and hibernation modes.
Computer Testing with PC-Doctor
Overview of using PC-Doctor diagnostics for error detection and creating diskettes.
Power System Checkout Procedures
Procedures to verify symptoms related to AC adapter and battery issues.
ThinkPad T43/T43p Product Overview
Product Specifications
Lists technical specifications for the ThinkPad T43/T43p series components.
System Status Indicators
Explains the meaning of various system status indicators on the computer.
Fn Key Combinations
Describes the functions of Fn key combinations with function keys.
Symptom-to-FRU Index for Troubleshooting
Numeric Error Codes and Actions
Lists numeric error codes, their symptoms, and FRU actions.
Beep and No-Beep Symptoms
Describes beep codes and no-beep symptoms with their FRU actions.
LCD Related Symptoms
Explains symptoms related to the LCD panel and replacement criteria.
Intermittent and Undetermined Problems
Procedures for diagnosing intermittent issues and when tests fail.
FRU Replacement Notices and Procedures
Screw Notices and Torque Specifications
Information on using special screws and tightening procedures.
Serial Number and UUID Management
Procedures for saving, restoring serial numbers, and setting UUID.
Removing and Replacing FRUs
Battery Pack Replacement (14.1-in. and 15.0-in. LCD)
Step-by-step instructions for removing and installing battery packs.
Hard Disk Drive Replacement
Step-by-step instructions for accessing and replacing the hard disk drive.
Keyboard Replacement
Detailed steps for removing and replacing the keyboard assembly.
Fan Assembly Replacement
Step-by-step guide for removing and replacing the fan assembly.
CPU Replacement
Instructions for removing and replacing the Central Processing Unit (CPU).
System Board and Base Cover Replacement
Procedures for removing and replacing the system board and base cover.
Component Locations
Front View Component Identification
Identifies key components and indicators on the front of the computer.
Rear View Connector Identification
Identifies connectors and indicators on the rear of the computer.
Bottom View Component Identification
Identifies components located on the bottom of the computer.
Parts List and FRU Identification
Overall Parts Exploded View
Exploded view showing all major parts and their labels.
14.1-inch LCD FRU Listings
Lists all Field Replaceable Units (FRUs) for the 14.1-in. LCD.
15.0-inch LCD FRU Listings
Lists all Field Replaceable Units (FRUs) for the 15.0-in. LCD.
Keyboard Part Numbers by Language
Lists available keyboard models for 15.0-in. LCDs by language.
Recovery CD Information
Windows XP Professional Recovery CDs
Lists P/Ns for Windows XP Pro recovery CDs by language.

Table of Contents