This manual contains the user guide of ThinkPad T420 and T420i notebooks, including the appearance, interfaces, safety instructions, etc.
This manual provides detailed information on the ThinkPad T420/T420i, including safety precautions, hardware layout, and pre‑installation steps. It guides users through everyday tasks such as using the keyboard, trackpoint, UltraNav, power management, and connecting peripherals.
Later chapters cover security features, data recovery, component replacement, expansion options, advanced configuration, system administration, troubleshooting, and support resources. The guide also includes regulatory notices and warranty information. This manual is written in Dutch.
Do not place the computer on your lap for long periods, keep hands away from warm parts, and never use the AC adapter to warm yourself.
Turn the computer off, place it in standby or sleep mode, and use a high‑quality carrying case that provides support and protection.