Lenovo 20AA000955 Manuals

Manuals and User Guides for Lenovo 20AA000955. We have 1 Lenovo 20AA000955 manual available for free PDF download: Hardware Maintenance Manual

Lenovo 20AA000955 Hardware Maintenance Manual

Lenovo 20AA000955 Hardware Maintenance Manual (118 pages)

Brand: Lenovo | Category: Laptop | Size: 37.89 MB

Table of Contents

Table of Contents

3
- About this Manual
  5
- Chapter 1. Safety Information
  
  7
- Chapter 2. Important Service Information
  
  27
  - Strategy for Replacing Frus
    27
    
    Strategy for Replacing a Solid-State Drive
    27
    
    Important Notice for Replacing a System Board
    28
    
    How to Use Error Message
    28
  - Strategy for Replacing Frus for CTO, Special-Bid, and Standard Models
    28
    
    Product Definition
    28
    
    FRU Identification
    28
- Chapter 3. General Checkout
  
  31
  - What to Do First
    31
  - Checkout Guide
    32
    
    Diagnosing Problems
    32
    
    Quick Test Programs
    33
    
    UEFI Diagnostic Program
    33
    
    Bootable Diagnostic Programs
    33
  - Power System Checkout
    34
    
    Checking the Ac Power Adapter
    35
    
    Checking the Built-In Battery and Operational Charging
    35
    
    Checking the Coin-Cell Battery
    35
- Chapter 4. Related Service Information
  
  37
  - Recovery Information for the Windows 10 Operating System
    37
  - Resetting Your Computer
    37
  - Using Advanced Startup Options
    37
  - Recovering Your Operating System if Windows 10 Fails to Start
    38
  - Creating and Using a Recovery USB Drive
    38
  - Passwords
    39
    
    Power-On Password
    39
    
    Hard Disk Password
    39
    
    Supervisor Password
    39
    
    How to Remove the Power-On Password
    40
    
    How to Remove the Hard Disk Password
    40
  - Power Management
    41
    
    Sleep Mode
    41
    
    Hibernation Mode
    41
  - Symptom-To-FRU Index
    42
    
    Numeric Error Codes
    42
    
    Error Messages
    43
    
    Beep Errors
    44
    
    No-Beep Symptoms
    45
    
    LCD-Related Symptoms
    46
    
    Intermittent Problems
    47
    
    Undetermined Problems
    47
- Chapter 5. Special Keys
  
  49
- Chapter 6. Locations
  
  53
  - Locating Computer Controls, Connectors, and Indicators
    53
    
    Front
    53
    
    Base
    54
    
    Left
    55
    
    Right
    55
    
    Rear
    56
    
    Bottom
    57
  - Locating Frus and Crus
    57
    
    Major Frus and Crus
    58
    
    LCD Frus and Crus
    64
    
    Miscellaneous Parts
    66
    
    Connector and Cable Guide
    66
  - Looking up FRU Information
    69
- Chapter 7. FRU Replacement Notices
  
  71
  - Screw Notices
    71
  - Retaining Serial Numbers
    72
    
    Restoring the Serial Number of the System Unit
    72
    
    Retaining the UUID
    72
    
    Reading or Writing the ECA Information
    73
- Chapter 8. Removing or Replacing a FRU
  
  75
1050 Docking-Station-Connector Bracket

82
2030 LCD Panel and LCD Cable

106
- 2040 Camera and Microphone Module and Aluminum Foil (for Thinkpad T490S Only)
  106
  - For Access, Remove These Frus in Order
    106
- 1020 Base Cover Assembly
  107
- 1190 LCD Unit
  107
- 2010 LCD Bezel Cover and LCD Bezel
  107
- 2020 LCD Hinges
  107
- 2050 Camera-And-Microphone-Module Cable and Antenna Kit
  107
- 2030 LCD Panel and LCD Cable
  108
- 2060 LCD Cover Assembly
  111
- Appendix A. Notices
  
  113
- Appendix B. Abbreviation Table
  
  115

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