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ThinkPad T420s - User Manual

ThinkPad T420s
152 pages
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Summary

Chapter 1. Safety Information

General safety

General safety rules for maintenance and handling equipment and personnel.

Electrical safety

Rules and precautions for working with electrical equipment to prevent shocks and hazards.

Safety inspection guide

Checklist to identify and mitigate potentially unsafe conditions before servicing.

Handling electrostatic discharge

Procedures to prevent damage from electrostatic discharge (ESD) to sensitive components.

Chapter 2. Important Service Information

Strategy for replacing FRUs

Guidelines and best practices for replacing Field Replaceable Units (FRUs) in the system.

Important notice for replacing a system board

Critical precautions for handling and replacing the system board to prevent damage.

Chapter 3. General Checkout

Chapter 4. Related Service Information

Symptom-to-FRU index

A cross-reference guide linking system symptoms to potential FRU failures or actions.

Chapter 7. FRU Replacement Notices

Chapter 8. Removing and Replacing a FRU

Battery pack replacement

Procedures for removing and installing the battery pack, with safety warnings.

Hard disk drive or SSD replacement

Steps for removing and replacing the hard disk drive or solid-state drive.

LCD unit replacement

Procedures for removing and replacing the entire LCD assembly.

System board replacement

Guidelines and steps for removing and replacing the system board.

Chapter 10. Parts List

ThinkPad T420s Specifications

General IconGeneral
RAMUp to 8GB DDR3
GraphicsIntel HD Graphics 3000 or NVIDIA NVS 4200M
BluetoothBluetooth 3.0
ProcessorIntel Core i5 or i7 (2nd generation)
Display14.0" HD+ (1600x900)
Storage160GB SSD
Operating SystemWindows 7 Professional
Battery6-cell Li-Ion
Optical DriveDVD
WirelessIntel Centrino Advanced-N 6205
PortsUSB 2.0, USB 3.0, VGA, DisplayPort, Ethernet, ExpressCard
Webcam720p HD
KeyboardThinkPad Precision Keyboard
SecurityFingerprint reader, TPM

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