Lenovo 21CN Manuals

Manuals and User Guides for Lenovo 21CN. We have 3 Lenovo 21CN manuals available for free PDF download: Hardware Maintenance Manual, User Manual

Lenovo 21CN Hardware Maintenance Manual (120 pages)

Brand: Lenovo | Category: Laptop | Size: 51 MB

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 Frus for CTO, Special-Bid, and Standard Models
  28
  - Product Definition
    28
  - FRU Identification
    29
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
Chapter 4. Related Service Information

37
- Reset or Restore Windows
  37
- Passwords
  37
  - Power-On Password
    37
  - Nvme Passwords
    37
  - Supervisor Password
    38
  - System Management Password
    38
  - How to Remove the Power-On Password
    39
  - How to Remove the Nvme Password
    39
  - How to Remove the System Management Password
    39
- Power Management
  40
  - Sleep Mode
    40
  - Hibernation Mode
    41
- Symptom-To-FRU Index
  41
  - Numeric Error Codes
    42
  - Error Messages
    43
  - Beep Errors
    43
  - Beep Symptoms
    45
  - LCD-Related Symptoms
    45
  - Intermittent Problems
    46
  - Undetermined Problems
    46
Chapter 5. Special Keys

49
Chapter 6. Locations

51
- Locating Computer Controls, Connectors, and Indicators
  51
  - Front
    51
  - Left and Right
    52
  - Rear
    54
  - Bottom
    54
- Locating Frus and Crus
  54
  - Major Frus and Crus
    56
  - LCD Frus and Crus
    60
  - Miscellaneous Parts
    65
  - Connector and Cable Guide
    65
- Looking up FRU Information
  67
Chapter 7. FRU Replacement Notices

69
- Service Tool Kit
  69
- Screw Notices
  69
- Retaining Serial Numbers
  70
Chapter 8. Removing or Replacing a FRU

73
Appendix A. Notices

115
Appendix B. Abbreviation Table

117

Lenovo 21CN User Manual (56 pages)

Brand: Lenovo | Category: Laptop | Size: 16 MB

Table of Contents
3
About this Documentation
5
Chapter 1. Meet Your Computer

7
- Front
  7
- Side
  9
- Rear
  11
- Bottom
  12
- USB Connectors
  13
Chapter 2. Get Started with Your Computer

15
- Get Started with Your Desktop
  15
- Manage Networks
  15
- Connect to Wi-Fi Networks
  15
- Airplane Mode
  16
- Interact with Your Computer
  16
- Use the Camera
  16
- Use the Keyboard Shortcuts
  16
- Use the Trackpoint Pointing Device
  17
- Use the Trackpad
  19
- Use the Multi-Touch Screen (for Selected Models)
  20
- Connect to an External Display
  21
Chapter 3. Explore Your Computer

23
Chapter 4. Secure Your Computer and Information

27
Chapter 5. Configure Advanced Settings

31
- Uefi Bios
  31
- What Is UEFI BIOS
  31
- Enter the UEFI BIOS Menu
  31
- Navigate in the UEFI BIOS Interface
  31
- Change the Startup Sequence
  31
- Detect Memory Retraining (for Selected Models)
  32
- Set the System Date and Time
  32
- Update UEFI BIOS
  32
Chapter 6. CRU Replacement

33
- CRU List
  33
- Disable the Built-In Battery
  33
- Replace a CRU
  34
- Base Cover Assembly
  34
- 2280 M.2 Solid-State Drive
  36
- Wireless-WAN Card (for Selected Models)
  37
- Keyboard (for Thinkpad X13 Gen 3)
  39
Chapter 7. Help and Support

43
- Frequently Asked Questions
  43
- Error Messages
  44
- Beep Errors
  45
- Self-Help Resources
  46
- Call Lenovo
  47
- Before You Contact Lenovo
  47
- Lenovo Customer Support Center
  48
- Purchase Additional Services
  49
Appendix A. Compliance Information

51
Appendix B. Notices and Trademarks

53

Lenovo 21CN User Manual (68 pages)

Brand: Lenovo | Category: Laptop | Size: 20 MB

Lenovo Categories

Laptop

Desktop Server

Monitor Tablet

More Lenovo Manuals

Lenovo 21CN Manuals

Lenovo 21CN Hardware Maintenance Manual (120 pages)

Table of Contents

About this Manual

Chapter 1. Safety Information

Chapter 2. Important Service Information

Chapter 3. General Checkout

Chapter 4. Related Service Information

Chapter 5. Special Keys

Chapter 6. Locations

Chapter 7. FRU Replacement Notices

Chapter 8. Removing or Replacing a FRU

Appendix A. Notices

Appendix B. Abbreviation Table

Lenovo 21CN User Manual (56 pages)

Table of Contents

Chapter 1. Meet Your Computer

Chapter 2. Get Started with Your Computer

Chapter 3. Explore Your Computer

Chapter 4. Secure Your Computer and Information

Chapter 5. Configure Advanced Settings

Chapter 6. CRU Replacement

Chapter 7. Help and Support

Appendix A. Compliance Information

Appendix B. Notices and Trademarks

Lenovo 21CN User Manual (68 pages)

Related Products

Lenovo Categories