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Lenovo 21HK Manuals
Manuals and User Guides for Lenovo 21HK. We have
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Lenovo 21HK manuals available for free PDF download: Hardware Maintenance Manual, User Manual
Lenovo 21HK Hardware Maintenance Manual (102 pages)
Brand:
Lenovo
| Category:
Laptop
| Size: 44 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
25
Strategy for Replacing Frus
25
Strategy for Replacing a Solid-State Drive
25
How to Use Error Message
26
Strategy for Replacing Frus for CTO, Special-Bid, and Standard Models
26
Product Definition
26
FRU Identification
26
Chapter 3. General Checkout
27
What to Do First
27
Checkout Guide
28
Diagnosing Problems
28
Quick Test Programs
29
UEFI Diagnostic Program
29
Bootable Diagnostic Programs
30
Power System Checkout
30
Checking the Ac Power Adapter
31
Checking the Built-In Battery and Operational Charging
31
Checking the Coin-Cell Battery
31
Chapter 4. Related Service Information
33
Reset or Restore Windows
33
Passwords
33
Power-On Password
33
Nvme Passwords
33
Supervisor Password
34
System Management Password
34
How to Remove the Power-On Password
35
How to Remove the Nvme Password
35
How to Remove the System Management Password
35
Power Management
36
Sleep Mode
36
Hibernation Mode
36
Symptom-To-FRU Index
37
Numeric Error Codes
38
Error Messages
39
Beep Errors
39
No-Beep Symptoms
41
LCD-Related Symptoms
41
Intermittent Problems
42
Undetermined Problems
42
Lenovo Memory Self Repair (for Intel Models Only)
43
Chapter 5. Special Keys
45
Chapter 6. Locations
47
Locating Computer Controls and Connectors
47
Front
47
Left and Right
48
Rear
50
Bottom
50
Locating Frus and Crus
51
Major Frus and Crus
52
LCD Frus and Crus
55
Miscellaneous Parts
57
Connector and Cable Guide
57
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
Reading or Writing the ECA Information
63
Chapter 8. Removing or Replacing a FRU
65
General Guidelines
65
Before Servicing the Computer
65
Disabling the Built-In Battery
65
Removing the Nano-SIM-Card and Nano-SIM-Card Tray
66
1010 Keyboard
66
1020 Base Cover Assembly
68
1030 Built-In Battery
70
1040 M.2 Solid-State Drive and M.2 Solid-State Drive Bracket (for Intel Models Only)
71
1050 M.2 Solid-State Drive and M.2 Solid-State Drive Bracket (for AMD Models Only)
73
1060 Wireless WAN Module and Wireless-WAN-Module Bracket (for Selected Models)
75
1070 I/O Bracket
76
1080 Thermal Fan Assembly
77
1090 USB Board Cable, USB Board and USB Board Bracket
78
1110 Speaker Assembly
79
1120 Coin-Cell Battery
80
1130 Memory Module (for Intel Models Only)
81
1140 Trackpad and Trackpad Cable
81
1150 NFC Module and NFC Module Cable (for Selected Models)
83
1160 Smart Card Reader, Smart Card Reader Cable and Dummy Smart Card Reader (for Selected Models)
83
Step Screw (Quantity)
84
1170 Power Button Board Cable and Power Button Board with or Without Fingerprint Reader
85
For Access, Remove this FRU
85
1020 Base Cover Assembly
85
Color Torque
86
Black
86
0.015 Nm (1.85 +/- 0.15 Kgf-CM)
86
1180 Wireless WAN Antenna Assembly (for Selected Models)
87
1190 System Board
87
How to Input the Product Information with Thinkpad System Board Self Repair Tool (for End Users)
89
1200 LCD Unit
90
2010 LCD Bezel Sheet and LCD Bezel
91
2020 LCD Hinges
92
2030 LCD Panel and Elastic Adhesive Tapes
93
2040 LCD Cable
94
2050 Camera-And-Microphone Module and Cable
95
2060 LCD Cover Assembly
96
Appendix A. Notices
97
Appendix B. Abbreviation Table
99
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Lenovo 21HK User Manual (74 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
Rear View
11
Side View
12
Bottom View
15
USB Connectors
17
Chapter 2. Get Started with Your Computer
19
Get Started with Your Desktop
19
Manage Networks
19
Connect to Wi-Fi Networks
19
Connect to a Cellular Network (for Selected Models)
20
Airplane Mode
20
Interact with Your Computer
21
Use the Camera
21
Use the Keyboard Shortcuts
21
Use the Trackpoint Pointing Device
22
Use the Trackpad
23
Use the Multi-Touch Screen (for Selected Models)
24
Connect to an External Display
26
Chapter 3. Explore Your Computer
29
Use the Intelligent Cooling Feature
29
Use the P-To-P 2.0 Charging Function
29
Set the Power Plan
29
Connect to a Bluetooth-Enabled Device
30
Enabling Nvidia Proprietary Drivers in Fedora (for Selected Models)
30
Accessories
30
Purchase Options
31
Chapter 4. Secure Your Computer and Information
33
Lock the Computer
33
Use the Fingerprint Reader (for Selected Models)
33
Use Passwords
34
Password Types
34
Set, Change, and Remove a Password
35
Use Power Loss Protection Function (for Selected Models)
36
Chapter 5. Configure Advanced Settings
37
Uefi Bios
37
What Is UEFI BIOS
37
Enter the UEFI BIOS Menu
37
Navigate in the UEFI BIOS Interface
37
Change the Startup Sequence
37
Detect Memory Retraining (for Intel Models Only)
38
Set the System Date and Time
38
Recover the UEFI BIOS
38
Update UEFI BIOS
38
Chapter 6. CRU Replacement
41
CRU List
41
Disable the Built-In Battery
41
Replace a CRU
42
Base Cover Assembly
42
Keyboard
45
Wireless WAN Card and Wireless-WAN-Card Bracket (for Selected Models)
50
Memory Module (for Intel Models Only)
51
Solid-State Drive and M.2 Solid-State Drive Bracket (for Intel Models Only)
52
Solid-State Drive and M.2 Solid-State Drive Bracket (for AMD Models Only)
54
Chapter 7. Help and Support
57
Frequently Asked Questions
57
Error Messages
58
Beep Errors
59
Self-Help Resources
60
Call Lenovo
61
Before You Contact Lenovo
61
Lenovo Customer Support Center
62
Purchase Additional Services
63
Appendix A. Compliance Information
65
Certification-Related Information
65
Operating Environment
68
Appendix B. Notices and Trademarks
71
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