Lenovo 20N9 Manuals

Manuals and User Guides for Lenovo 20N9. We have 1 Lenovo 20N9 manual available for free PDF download: Hardware Maintenance Manual

Lenovo 20N9 Hardware Maintenance Manual

Lenovo 20N9 Hardware Maintenance Manual (107 pages)

Brand: Lenovo | Category: Laptop | Size: 38.8 MB

Table of Contents

Table of Contents
4
About this Manual

6
Chapter 1. Safety Information

8
Chapter 2. Important Service Information

28
- Strategy for Replacing Frus
  28
- Strategy for Replacing Frus for CTO, Special Bid Model, and Standard Models
  29
  - Product Definition
    29
  - FRU Identification
    30
Chapter 3. General Checkout

32
- What to Do First
  32
- Checkout Guide
  33
  - Diagnosing Problems
    33
  - Quick Test Programs
    34
  - UEFI Diagnostic Program
    34
  - Bootable Diagnostic Programs
    34
- Power System Checkout
  35
Chapter 4. Related Service Information

38
- Restoring the Factory Contents by Using the Recovery Disc Set
  38
- Recovery Overview for the Windows 10 Operating System
  39
- Passwords
  41
  - Power-On Password
    41
  - Hard Disk Password
    41
  - Supervisor Password
    41
  - How to Remove the Power-On Password
    42
  - How to Remove the Hard Disk Password
    42
- Power Management
  43
  - Sleep Mode
    43
  - Hibernation Mode
    43
- Symptom-To-FRU Index
  44
  - Numeric Error Codes
    44
  - Error Messages
    46
  - Beep Errors
    46
  - No-Beep Symptoms
    48
  - LCD-Related Symptoms
    48
  - Intermittent Problems
    48
  - Undetermined Problems
    49
Chapter 5. Function Keys

50
Chapter 6. Locations

52
- Locating Computer Controls, Connectors, and Indicators
  52
  - Front
    52
  - Base
    53
  - Left
    54
  - Right
    55
- Locating Frus and Crus
  55
  - Major Frus
    57
  - LCD Frus
    59
  - Miscellaneous Parts
    60
  - Connector and Cable Guide
    60
- Looking up FRU Information
  62
Chapter 7. FRU Replacement Notices

64
- Service Tool Kit
  64
- Screw Notices
  64
- Retaining Serial Numbers
  65
  - Restoring the Serial Number of the System Unit
    65
  - Retaining the UUID
    66
Chapter 8. Removing or Replacing a FRU

68
- General Guidelines
  68
- Before Servicing the Computer
  69
- Removing the Microsd Card
  69
- Disabling the Built-In Battery
  69
- 1010 Keyboard
  70
- 1020 Base Cover Assembly
  72
- 1030 Hard Disk Drive, Cable, and Bracket
  74
- 1040 Fingerprint Reader Card, Cable, and Bracket
  75
- 1050 Memory Module
  76
- 1060 M.2 Solid-State Drive and Brackets
  77
- 1070 I/O Card
  79
- 1080 Speaker Assembly
  80
- 1090 Wireless LAN Card
  81
- 1110 Built-In Battery
  82
- 1120 Coin-Cell Battery
  83
- 1130 Thermal Fan Assembly
  84
- 1140 Trackpad Cable and Trackpad
  85
- 1150 System Board and USB Bracket
  86
- 1160 LCD Unit
  89
- 1170 Keyboard Bezel Assembly
  90
- 2010 LCD Bezel Assembly
  90
- 2020 LCD Panel
  91
- 2030 Hinge Kit
  92
- 2040 Integrated Camera and Microphone Combo Card
  95
- 2050 LED and Camera Cable Assembly
  95
- 2060 Wireless LAN Antennas Assembly and LCD Rear Cover Assembly
  96
Appendix A. Notices

100
Appendix B. Abbreviation and Acronym Table

102

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