Lenovo 21TC Manuals

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

Lenovo 21TC User Manual (118 pages)

Brand: Lenovo | Category: Laptop | Size: 24 MB

Lenovo 21TC Hardware Maintenance Manual (112 pages)

Brand: Lenovo | Category: Laptop | Size: 43 MB

Table of Contents
3
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
30
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
Use Lenovo Recovery Options
33
Use Window Recovery Options
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
37
Symptom-To-FRU Index
37
Numeric Error Codes
38
Error Messages
39
Battery-Charge LED Indicator Diagnosis
39
No-Beep Symptoms
41
LCD-Related Symptoms
42
Intermittent Problems
43
Undetermined Problems
43
Lenovo Memory Self Repair (for Intel Models Only)
44
Chapter 5. Special Keys
45
Chapter 6. Locations
47
Locating Computer Controls and Connectors
47
Front
47
Left and Right
48
Bottom
48
Locating Frus and Crus
51
Major Frus and Crus
52
LCD Frus and Crus
55
Miscellaneous Parts
56
Connector and Cable Guide
56
Looking up FRU Information
59
Chapter 7. FRU Replacement Notices
61
Service Tool Kit
61
Screw Notices
61
Sensor Calibration
62
Retaining Serial Numbers
63
Restoring the Serial Number of the System Unit
63
Retaining the UUID
64
Reading or Writing the ECA Information
65
Chapter 8. Removing or Replacing a FRU
67
General Guidelines
67
Before Servicing the Computer
67
Disabling the Fast Startup and Built-In Battery
67
Removing the Nano-SIM Card and Nano-SIM-Card Tray
68
Base Cover Assembly
68
Applying Labels to the Base Cover Assembly
70
M.2 Solid-State Drive and M.2 Solid-State Drive Bracket
71
Type 1
72
Type 2
72
Wireless WAN Module and Wireless WAN Module Bracket (for Selected Models)
73
5G Models
73
Models
74
Dummy Wireless WAN Module and Dummy Wireless WAN Module Bracket (for Selected Models)
74
Built-In Battery
75
Thermal Fan Assembly
77
I/O Board
78
Power Button with or Without Fingerprint Reader
79
System Board I/O Bracket
80
I/O Cable
81
Wireless WAN Antennas Assembly (for Selected Models)
81
Coin-Cell Battery
83
Wireless WAN Antenna Cable Guide
83
Speaker Assembly
84
Cable Guide for LCD Unit and Wireless LAN Antenna Assembly
85
Speaker Cable Guide
86
Smart Card Reader (for Selected Models)
87
Dummy Smart Card Reader (for Selected Models)
88
Smart Card Reader-Trackpad-NFC Cable (for Selected Models)
88
Trackpad
89
Step Screw (Quantity) Color
90
M1.6 × 2.1 MM, Flat-Head, Nylon-Coated (1) Black
90
NFC Module (for Selected Models)
92
For Access, Remove These Frus in Order
92
Base Cover Assembly
92
Built-In Battery
92
System Board
93
Replace the System Board
93
Torque
94
Nm (1.0 Kgf-CM)
94
Nm (1.85 Kgf-CM)
94
How to Input the Product Information with Thinkpad System Board Self Repair Tool
95
LCD Unit
95
Keyboard Assembly
96
LCD Bezel Sheet
97
Camera Shutter or Dummy Camera
98
Strip Cover
98
Hinge Cap
99
LCD Hinges
100
LCD Panel, LCD Cable and Elastic Adhesive Tapes
100
How to Install New Color Profiles after Replacing the LCD Panel
102
Camera Module and Camera Cable
103
Wireless LAN Antenna Assembly
104
Antenna Locations
104
LCD Cover Assembly
105
Appendix A. Notices
107
Appendix B. Abbreviation Table
109

Lenovo 21TC User Manual (64 pages)

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

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