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21BU
User Manuals: Lenovo 21BU Laptop ThinkPad
Manuals and User Guides for Lenovo 21BU Laptop ThinkPad. We have
2
Lenovo 21BU Laptop ThinkPad manuals available for free PDF download: Hardware Maintenance Manual, User Manual
Lenovo 21BU Hardware Maintenance Manual (102 pages)
Brand:
Lenovo
| Category:
Laptop
| Size: 43 MB
Table of Contents
Table of Contents
3
About this Manual
5
Chapter 1. Safety Information
7
General Safety
7
Electrical Safety
7
Safety Inspection Guide
9
Handling Devices that Are Sensitive to Electrostatic Discharge
9
Grounding Requirements
10
Safety Notices (Multilingual Translations)
10
Chapter 2. Important Service Information
27
Strategy for Replacing Frus
27
Strategy for Replacing a Solid-State Drive
27
How to Use Error Message
28
Strategy for Replacing Frus for CTO, Special-Bid, and Standard Models
28
Product Definition
28
FRU Identification
28
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
No-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
49
Left and Right
50
Rear
51
Bottom
52
Locating Frus and Crus
53
Major Frus and Crus
54
LCD Frus and Crus
57
Miscellaneous Parts
59
Connector and Cable Guide
59
Looking up FRU Information
62
Chapter 7. FRU Replacement Notices
63
Service Tool Kit
63
Screw Notices
63
Retaining Serial Numbers
64
Restoring the Serial Number of the System Unit
64
Retaining the UUID
65
Reading or Writing the ECA Information
65
Chapter 8. Removing or Replacing an FRU
67
General Guidelines
67
Before Servicing the Computer
67
Disabling the Built-In Battery
67
Disable Fast Startup and the Built-In Battery
68
Removing the Nano-SIM-Card and Nano-SIM-Card Tray
68
1010 Keyboard
69
1020 Base Cover Assembly
71
1030 Built-In Battery
72
1040 M.2 Solid-State Drive and M.2 Solid-State Drive Bracket (for Intel Models Only)
73
1050 M.2 Solid-State Drive and M.2 Solid-State Drive Bracket (for AMD Models Only)
75
1060 Wireless WAN Card and Wireless-WAN-Card Bracket (for Selected Models)
77
1070 I/O Bracket
78
1080 Thermal Fan Assembly
78
1090 USB Board Cable and USB Board
80
1110 Speaker Assembly
81
1120 Coin-Cell Battery
82
1130 Memory Module (for Intel Models Only)
82
1140 Trackpad and Trackpad Cable
83
Step Screw (Quantity) Color
84
M2.5 × 4.0 MM, Flat-Head, Nylon-Coated (2) Silver
84
Torque
84
0.1 +/- 0.015 Nm
84
1150 NFC Module and NFC Module Cable (for Selected Models)
85
1160 Smart Card Reader, Smart Card Reader Cable and Dummy Smart Card Reader (for Selected Models)
85
1170 Power Button Board Cable and Power Button Board with or Without Fingerprint Reader
87
(1.85 +/- 0.15 Kgf-CM)
88
1180 Wireless WAN Antenna Assembly (for Selected Models)
89
1190 System Board
89
1200 LCD Unit
91
2010 LCD Bezel Sheet and LCD Bezel
92
2020 LCD Hinges
93
2030 LCD Panel and Elastic Adhesive Tapes
93
2040 LCD Cable
95
2050 Camera-And-Microphone Module and Cable
96
2060 LCD Cover Assembly
96
Appendix A. Notices
97
Appendix B. Abbreviation Table
99
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Lenovo 21BU User Manual (68 pages)
Brand:
Lenovo
| Category:
Laptop
| Size: 29 MB
Table of Contents
Table of Contents
3
About this Documentation
5
Chapter 1. Meet Your Computer
7
Front View
7
Side View
11
Bottom View
13
Rear View
15
USB Connectors
16
Chapter 2. Get Started with Your Computer
17
Get Started with Your Desktop
17
Manage Networks
17
Connect to Wi-Fi Networks
17
Airplane Mode
18
Interact with Your Computer
18
Use the Camera
18
Use the Keyboard Shortcuts
18
Use the Trackpoint Pointing Device
19
Use the Trackpad
20
Use the Multi-Touch Screen (for Selected Models)
21
Connect to an External Display
22
Chapter 3. Explore Your Computer
25
Use the Intelligent Cooling Feature
25
Use the P-To-P 2.0 Charging Function
25
Set the Power Plan
25
Connect to a Bluetooth-Enabled Device
26
Enabling Nvidia Proprietary Drivers in Fedora (for Selected Models)
26
Accessories
26
Purchase Options
27
Chapter 4. Secure Your Computer and Information
29
Lock the Computer
29
Use the Fingerprint Reader (for Selected Models)
29
Use Privacy Protection (for Selected Models)
30
Use Passwords
30
Password Types
30
Set, Change, and Remove a Password
31
Use Power Loss Protection Function (for Selected Models)
32
Chapter 5. Configure Advanced Settings
33
Uefi Bios
33
What Is UEFI BIOS
33
Enter the UEFI BIOS Menu
33
Navigate in the UEFI BIOS Interface
33
Change the Startup Sequence
33
Detect Memory Retraining
34
Set the System Date and Time
34
Update UEFI BIOS
34
Chapter 6. CRU Replacement
35
CRU List
35
Disable the Built-In Battery
35
Replace a CRU
36
Base Cover Assembly
36
Keyboard
39
Wireless WAN Card and Wireless-WAN-Card Bracket (for Selected Models)
44
Memory Module (for Intel Models Only)
45
Solid-State Drive and M.2 Solid-State Drive Bracket (for Intel Models Only)
46
Solid-State Drive and M.2 Solid-State Drive Bracket (for AMD Models Only)
48
Chapter 7. Help and Support
51
Frequently Asked Questions
51
Error Messages
52
Beep Errors
53
Self-Help Resources
54
Call Lenovo
55
Before You Contact Lenovo
55
Lenovo Customer Support Center
56
Purchase Additional Services
57
Appendix A. Compliance Information
59
Certification-Related Information
59
Operating Environment
62
Appendix B. Notices and Trademarks
65
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