This document is a user manual for ThinkPad T420 and T420i. Users are required to read the safety and warranty guide as well as the regulatory notice before using the information and supported products. The manual provides an overview of the product and safety guidelines.
This guide explains how to safely use the ThinkPad T420 and T420i notebooks, covering important safety measures, handling of the battery, power adapter, and transport precautions. It also describes how to register the computer and access Lenovo support resources.
The manual is organized into chapters on general overview, using the computer, security features, recovery options, component replacement, advanced configuration, troubleshooting, and obtaining support. It includes step‑by‑step instructions for installing operating systems, drivers, and ThinkVantage utilities.
| Supported Operating Systems | Windows 7, Windows Vista, Windows XP |
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Press Fn+F4 to place the computer in sleep (standby) mode.
Press Fn+F12 to place the computer in hibernate mode.