VAX 4000 Model 100, Troubleshooting and Diagnostics Information

This document, titled "VAX 4000 Model 100 Troubleshooting and Diagnostics Information" (September 1992), is a manual for users with some computer experience. It describes procedures for solving basic problems and performing diagnostics on the VAX 4000 Model 100 system.

The manual is structured into two main chapters:

1. Troubleshooting and Diagnosing Problems:

   • Provides initial steps for problem resolution, including checking cables, loopback connectors, and terminators.
   • Features a comprehensive troubleshooting table that lists common symptoms for system issues (e.g., power, boot failures) and various peripheral devices (Compact Disc Drives, Tape Drives), offering possible causes and suggested solutions.
   • Details basic diagnostic tests such as automatic power-up tests (displaying CPU, ROM, and memory status, and reporting errors) and self-tests (for individual device diagnostics using commands like SHOW CONFIG to identify failed field-replaceable units or FRUs).
   • Offers instructions on what information to gather (error messages, failed self-tests, Status LED display readings, serial numbers) before contacting Digital Services for support.

2. Running the Diagnostic Monitor (MDM):

   • Introduces the MicroVAX Diagnostic Monitor (MDM), an optional software package used for isolating and identifying system faults, displaying system configuration, and testing device interoperation.
   • Outlines typical situations for using MDM (e.g., new system setup, adding devices, post-error checks, periodic testing) and its limitations (e.g., performs reads only, no data writing to prevent data loss).
   • Provides detailed procedures for preparing and booting MDM from various media and system configurations, including diskless/tapeless systems, RF-series storage, DSSI VAXclusters, and RRD-series compact discs.
   • Explains MDM's Main Menu options, such as "Test the System" (for overall system health checks and FRU identification), "Display System Configuration and Devices" (to list recognized hardware and their status), and "Select Single Device Tests" (for detailed component-specific diagnostics). It also briefly mentions System Utilities (like IOADDRES and RRD-series drive unit number updates) and Service Menu options (restricted to qualified personnel).
   • Concludes with instructions on how to properly exit MDM and reboot the system.