Lenovo ThinkPad T420 and T420i User Guide

About this manual

This guide provides detailed information on the ThinkPad T420 and T420i, including hardware layout, key functions, and pre‑installation safety warnings. It also describes ThinkVantage utilities, power management, and connectivity options.

Later chapters cover security features, recovery procedures, component replacement, advanced configuration, problem prevention, troubleshooting steps, and how to obtain support from Lenovo.

What's inside

• General Overview of the Product
• Using the Computer
• Security
• Recovery
• Replacing Components
• Improving the Computer
• Advanced Configuration
• Preventing Problems
• Troubleshooting the Computer
• Obtaining Support

Frequently asked questions

How do I put the notebook into sleep mode?

Press Fn+F4 to place the computer in sleep (standby) mode.

How do I put the notebook into hibernate mode?

Press Fn+F12 to place the computer in hibernate mode.

Where can I download the user guides online?

Visit http://www.lenovo.com/support and click on User Guides & Manuals.

What is the copyright year of this manual?

The manual is copyrighted in 2011.