Lenovo 20L5 Manuals

Lenovo 20L5 Manuals

Manuals and User Guides for Lenovo 20L5. We have 1 Lenovo 20L5 manual available for free PDF download: Hardware Maintenance Manual

Lenovo 20L5 Hardware Maintenance Manual

Lenovo 20L5 Hardware Maintenance Manual (114 pages)

Brand: Lenovo | Category: Laptop | Size: 39.6 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
  33
- UEFI Diagnostic Program
  33
- Bootable Diagnostic Programs
  33
- Power System Checkout
  34
- Checking the Ac Power Adapter
  35
- Checking the Removable Battery and the Operational Charging
  35
- Checking the Coin-Cell Battery
  36
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
  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. Status Indicators

49
Chapter 6. Using the Special Keys

51
Chapter 7. Locations

53
- Locating Computer Controls, Connectors, and Indicators
  53
- Front View
  53
- Left-Side View
  54
- Right-Side View
  54
- Bottom View
  55
- Locating Frus and Crus
  55
- Major Frus and Crus
  57
- LCD Frus
  59
- Miscellaneous Parts
  60
- Connector and Cable Guide
  60
- Looking up FRU Information
  64
Chapter 8. FRU Replacement Notices

65
Chapter 9. Removing or Replacing a FRU

69
- General Guidelines
  69
- Disabling the Built-In Battery
  70
- 1010 Removable Battery
  70
- 1020 Nano-SIM Card
  71
- 1030 Base Cover Assembly
  71
- 1040 Memory Module
  74
- 1050 Internal Storage Drive
  75
- 1060 Wireless-WAN Card
  79
- 1070 Wireless-LAN Module
  79
- 1080 M.2 Solid-State Drive in the Wireless-WAN-Card Slot
  80
- 1090 Keyboard
  81
- 1100 Coin-Cell Battery
  83
- 1110 Speaker Assembly
  84
- 1120 Built-In Battery
  85
- 1130 Smart-Card Reader Assembly
  86
- 1140 I/O Bracket and RJ45 Bracket
  87
- 1150 Thermal Fan Assembly
  88
- 1160 Trackpad and Trackpad Cable
  90
- 1170 System Board
  91
- 1180 Power-Button Card
  94
- 1190 Fingerprint-Reader Card
  94
- 1200 NFC Module
  96
- 1210 LCD Unit
  96
- 1220 Keyboard Bezel Assembly
  98
- 2010 LCD Bezel Sheet
  99
- 2020 LCD Panel
  100
- 2030 LCD Hinge Assembly
  102
- 2040 Camera/Microphone Module
  104
- 2050 Camera and LED Cable, and LCD Cable
  105
- 2060 Wireless-LAN/WAN Antenna Assembly and LCD Rear-Cover Assembly
  106
Appendix A. Notices

109
- Electronic Emissions Notices
  110
- Trademarks
  110
Appendix B. Abbreviation Table

111

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