This document provides safety information and specifications for a product by International Business Machines Corporation (IBM). The product is a desktop and microtower model computer with various features and options.
This user guide covers safety precautions, hardware identification, and detailed procedures for installing external and internal options on the IBM A20i Type 2255 and 2275 desktop and microtower models. It includes sections on battery replacement, modem safety, laser compliance, and system configuration utilities.
The manual also contains appendices with battery‑changing instructions, system program updates, address maps, DMA channel assignments, and trademark notices, helping technicians and end‑users maintain and service the computers safely.
Use only IBM Part Number 33F8354 or an equivalent battery recommended by the manufacturer.
First turn everything off, then attach all cables to the devices before powering the unit back on.