This document is the Hardware Maintenance Manual for ThinkPad T420s and T420si, providing safety information and important service information for the products.
This manual offers detailed service and reference information for the ThinkPad T420s and T420si models. It is intended for trained technicians and includes safety guidelines, FRU identification, and troubleshooting steps.
The document covers chapters on safety information, important service procedures, general checkout, FRU replacement, parts lists, and appendices with notices. It also provides part numbers, model identifiers, and instructions for removing and replacing components such as batteries, drives, and keyboards.
The manual covers the ThinkPad T420s and T420si models.
The first edition was published in February 2011.
The part number is 0A60241.