Lenovo 20ND Manuals

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

Lenovo 20ND Hardware Maintenance Manual

Lenovo 20ND Hardware Maintenance Manual (103 pages)

Brand: Lenovo | Category: Laptop | Size: 67.96 MB

Table of Contents

Table of Contents
3
About this Manual
5
Chapter 1. Safety Information

7
Chapter 2. Important Service Information

27
Chapter 3. General Checkout

31
- What to Do First
  31
- Checkout Guide
  32
- Diagnosing Problems
  32
- Quick Test Programs
  32
- UEFI Diagnostic Program
  33
- Bootable Diagnostic Programs
  33
- Power System Checkout
  34
- Checking the Ac Power Adapter
  34
- Checking Operational Charging
  35
- Checking the Built-In Battery and Operational Charging
  35
- Checking the Coin-Cell Battery
  36
Chapter 4. Related Service Information

37
- Recovery Overview 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
  44
- Beep Errors
  44
- No-Beep Symptoms
  46
- LCD-Related Symptoms
  46
- Intermittent Problems
  46
- Undetermined Problems
  47
Chapter 5. Special Keys

49
Chapter 6. Locations

51
- Locating Computer Controls, Connectors, and Indicators
  51
- Front
  51
- Base
  51
- Left
  52
- Right
  52
- Locating Frus and Crus
  52
- Major Frus and Crus
  54
- LCD Frus and Crus
  56
- Miscellaneous Parts
  57
- Connector and Cable Guide
  57
- Looking up FRU Information
  59
Chapter 7. FRU Replacement Notices

61
- Service Tool Kit
  61
- Screw Notices
  61
- Retaining Serial Numbers
  62
- Restoring the Serial Number of the System Unit
  62
- Retaining the UUID
  63
Chapter 8. Removing or Replacing a FRU

65
- General Guidelines
  65
- Before Servicing the Computer
  66
- Disabling the Built-In Battery
  66
- Removing the Microsd Card
  66
- 1010 Base Cover Assembly
  66
- 1020 Built-In Battery
  68
- 1030 M.2 Solid-State Drive and Brackets
  69
- 1040 Thermal Fan Assembly
  72
- 1050 Memory Module
  73
- 1060 Internal Storage Drive, Cable and Bracket
  74
- 1070 Wireless LAN Card
  75
- 1080 Coin-Cell Battery
  76
- 1090 Keyboard
  76
- 1100 USB Card Cable
  79
- 1110 USB Card
  79
- 1120 Speaker Assembly
  81
- 1130 Fingerprint Reader Cable, Bracket and Card (for E590/R590)
  82
- 1140 Trackpad and Cable
  83
- 1150 System Board
  85
- 1160 LCD Unit
  87
- 1170 Keyboard Bezel Assembly
  89
- 2010 LCD Bezel
  89
- 2020 LCD Panel
  90
- 2030 LCD Hinges
  91
- 2040 Camera/Microphone Module
  91
- 2050 LCD Cable
  92
- 2060 Wireless-LAN Antenna Assembly
  93
- 2070 LCD Cover Assembly
  95
Appendix A. Notices

97
Appendix B. Abbreviation and Acronym Table

99

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