Lenovo 20SF Manuals

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

Lenovo 20SF Hardware Maintainence Manual

Lenovo 20SF Hardware Maintainence Manual (95 pages)

Brand: Lenovo | Category: Laptop | Size: 26.58 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 the Built-In Battery and Operational Charging
  35
- Checking the Coin-Cell Battery
  35
Chapter 4. Related Service Information

37
- Reset or Restore Windows
  37
- Passwords
  37
- Power-On Password
  37
- Hard Disk Password
  37
- Supervisor Password
  38
- System Management Password
  38
- How to Remove the Power-On Password
  39
- How to Remove the Hard Disk Password
  39
- How to Remove the System Management Password
  40
- Power Management
  40
- Sleep Mode
  40
- Hibernation Mode
  41
- Symptom-To-FRU Index
  41
- Numeric Error Codes
  42
- Error Messages
  43
- Beep Errors
  44
- No-Beep Symptoms
  46
- LCD-Related Symptoms
  46
- Intermittent Problems
  47
- 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
- Bottom
  53
- Locating Frus and Crus
  53
- Major Frus and Crus
  55
- LCD Frus
  57
- Miscellaneous Parts
  58
- Connector and Cable Guide
  58
- Looking up FRU Information
  60
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
- 1010 Thinkpad Pen Pro (for Selected Models)
  66
- 1020 Base Cover Assembly
  67
- 1030 Keyboard
  69
- 1040 Pen Charger with Cable
  70
- 1050 Speaker Assembly
  71
- 1060 Wireless LAN Card
  71
- 1070 Coin-Cell Battery
  72
- 1080 M.2 Solid-State Drive
  73
- 1090 Built-In Battery
  74
- 1110 Heatsink
  75
- 1120 Power Card and Power Card Cable
  76
- 1130 Touchpad and Touchpad Cable
  78
- 1140 System Board
  79
- 1150 World-Facing Camera (for Selected Models)
  81
- 1160 LCD Unit
  81
- 1170 Keyboard Bezel Assembly
  82
- 2010 LCD Strip Cover
  83
- 2020 LCD Panel
  83
- 2030 LCD Hinges
  84
- 2040 Conventional Camera
  84
- 2050 Camera and Sensor Board Cable
  85
- 2060 Wireless LAN Antenna Assembly
  85
- 2070 LCD Cover Assembly
  87
Appendix A. Notices

89
Appendix B. Abbreviation and Acronym Table

91

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