This document is the user manual for ThinkPad T420 and T420i, which includes safety precautions, warranty manual, and regulatory considerations. It also introduces the features and characteristics of the products. Please note that it is important to read the relevant content before using the product.
This manual provides a complete overview of the ThinkPad T420 and T420i notebooks, including hardware layout, safety precautions, and regulatory information. It guides users through initial setup, power management, battery handling, and the use of built‑in features such as UltraNav, ThinkVantage tools, and security options.
Additional sections cover troubleshooting, maintenance, and how to obtain driver updates or service support. The document also includes environmental disposal instructions and warranty notices for Lenovo products. This manual is written in Chinese.