Lenovo 21B4 Manuals

Manuals and User Guides for Lenovo 21B4. We have 2 Lenovo 21B4 manuals available for free PDF download: Hardware Maintenance Manual, User Manual

Lenovo 21B4 Hardware Maintenance Manual (116 pages)

Brand: Lenovo | Category: Laptop | Size: 59.1 MB

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

7
Chapter 2. Important Service Information

27
Chapter 3. General Checkout

29
- What to Do First
  29
- Checkout Guide
  30
- Diagnosing Problems
  30
- Quick Test Programs
  31
- UEFI Diagnostic Program
  31
- Bootable Diagnostic Programs
  31
- Power System Checkout
  32
- Checking the Ac Power Adapter
  33
- Checking the Built-In Battery and Operational Charging
  33
- Checking the Coin-Cell Battery
  33
Chapter 4. Related Service Information

35
- Reset or Restore Windows
  35
- Passwords
  35
- Power-On Password
  35
- Nvme Passwords
  36
- Supervisor Password
  36
- System Management Password
  36
- How to Remove the Power-On Password
  37
- How to Remove the Nvme Password
  37
- How to Remove the System Management Password
  37
- Power Management
  38
- Sleep Mode
  38
- Hibernation Mode
  39
- Symptom-To-FRU Index
  39
- Numeric Error Codes
  40
- Error Messages
  41
- Beep Errors
  41
- Beep Symptoms
  43
- LCD-Related Symptoms
  43
- Intermittent Problems
  44
- Undetermined Problems
  44
Chapter 5. Special Keys

47
Chapter 6. Locations

49
- Locating Computer Controls and Connectors
  49
- Front View
  49
- Side View
  51
- Bottom View
  53
- Locating Frus and Crus
  54
- Major Frus and Crus
  55
- LCD Frus and Crus
  58
- Miscellaneous Parts
  61
- Connector and Cable Guide
  61
- Looking up FRU Information
  63
Chapter 7. FRU Replacement Notices

65
- Service Tool Kit
  65
- Screw Notices
  65
- Sensor Calibration
  66
- Retaining Serial Numbers
  67
- Restoring the Serial Number of the System Unit
  67
- Retaining the UUID
  68
- Reading or Writing the ECA Information
  68
Chapter 8. Removing or Replacing a FRU

71
Appendix A. Notices

111
Appendix B. Abbreviation Table

113

Lenovo 21B4 User Manual (64 pages)

Brand: Lenovo | Category: Laptop | Size: 4.69 MB

Table of Contents
3
Discover Your Lenovo Notebook
5
Chapter 1. Meet Your Computer

7
- Front View
  7
- Side View
  9
- Bottom View
  11
- Features and Specifications
  12
- USB Specifications
  12
Chapter 2. Get Started with Your Computer

15
- Access Networks
  15
- Connect to Wi-Fi Networks
  15
- Connect to a Cellular Network
  15
- Models)
  15
- Turn on the Airplane Mode
  16
- Interact with Your Computer
  16
- Use the Keyboard Shortcuts
  16
- Use the Trackpoint Pointing Device
  17
- Use the Trackpad
  19
- Use the Touch Screen (for Selected Models)
  20
- Connect to an External Display
  22
- Get to Know YOGA Modes
  23
- Use Thinkpad Pen Pro
  23
- Yoga Gen7 Only)
  23
Chapter 3. Explore Your Computer

25
- Lenovo Apps
  25
- The Vantage App
  25
- Lenovo Quick Clean
  25
- Smart Features (for Selected Models)
  25
- Intelligent Cooling (for Intel Models Only)
  28
- Manage Power
  28
- Check the Battery Status
  29
- Charge the Computer
  29
- Change the Power Settings
  30
- Transfer Data
  30
- Set up a Bluetooth Connection
  30
- Set up an NFC Connection
  30
- Use an SD Card or Smart Card
  31
- Accessories
  31
- Purchase Accessories
  31
Chapter 4. Secure Your Computer and Information

33
Chapter 5. Configure Advanced Settings

39
- Uefi Bios
  39
- Enter the UEFI BIOS Menu
  39
- Navigate in the UEFI BIOS Interface
  39
- Set the System Date and Time
  39
- Change the Startup Sequence
  39
- Update UEFI BIOS
  39
- Install a Windows Operating System and Drivers
  40
Chapter 6. CRU Replacement

43
- CRU List
  43
- Disable Fast Startup and the Built-In Battery
  43
- Replace a CRU
  44
- Base Cover Assembly
  44
- Wireless WAN Card (for Selected Models)
  46
- 2242 M.2 Solid-State Drive and Bracket
  48
- Keyboard
  50
Chapter 7. Help and Support

53
- Frequently Asked Questions
  53
- Error Messages
  54
- Beep Errors
  55
- Self-Help Resources
  56
- Windows Label
  57
- Call Lenovo
  57
- Before You Contact Lenovo
  57
- Lenovo Customer Support Center
  58
- Purchase Additional Services
  59
Appendix A. Compliance Information

61
Appendix B. Notices and Trademarks

63

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Lenovo 21B4 Manuals

Lenovo 21B4 Hardware Maintenance Manual (116 pages)

Table of Contents

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 21B4 User Manual (64 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

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Lenovo Categories