DECstation 2100/3100

This document is the official maintenance guide for the Digital Equipment Corporation DECstation 2100 and 3100 workstations. It provides comprehensive procedures for hardware isolation, running power-up and extended self-tests, interpreting status LED codes, and performing field-replaceable unit (FRU) replacements, including disk drives, system modules, and power supplies. The guide also details console commands and contains extensive appendices with equipment specifications and part numbers.