Lenovo ThinkPad T420/T420i User Manual

About this manual

This manual gives important safety information, hardware layout, and connector details for the ThinkPad T420 and T420i notebooks. It includes sections on product overview, key locations, and certification labels.

The guide covers everyday use, configuration, power management, battery care, docking stations, operating‑system installation, and detailed troubleshooting steps. It also explains how to obtain updated drivers and support from Lenovo’s website. This manual is written in Czech.

What's inside

• Important Information
• Product Overview
• Using the Computer
• Security
• Recovery Overview
• Device Replacement
• Advanced Configuration
• Problem Prevention
• Troubleshooting
• Getting Support

Frequently asked questions

How do I put the ThinkPad into sleep mode?

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

How do I put the ThinkPad into hibernation?

Press the Fn+F12 key combination to place the computer in hibernation mode.

Where can I download updated user guides and manuals?

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