VAX 4000 Troubleshooting and Diagnostics

This document, titled "VAX 4000 Troubleshooting and Diagnostics," is a technical manual published by Digital Equipment Corporation in March 1990. It is designed to help users identify, isolate, and resolve problems with their VAX 4000 systems.

The manual is organized into three main chapters and an appendix:

1. Troubleshooting During Power-On: This chapter provides guidance and corrective actions for issues encountered when the VAX 4000 system is powered on, including problems with self-tests, automatic booting, and specific boot processes from RF-Series Integrated Storage Assemblies (ISA) or tape cartridges. It includes a table detailing common problems, possible causes, and solutions.
2. Troubleshooting During Normal Operation: This section addresses problems that may occur while the system is in normal operation, such as power loss, overheating, unexpected system halts, and issues related to ISA and TK70 tape drives. It also includes a table outlining symptoms, causes, and corrective steps.
3. Running the MicroVAX Diagnostic Monitor (MDM): This comprehensive chapter describes the MDM software package, a diagnostic tool used to identify faults, display system configuration, and test internal devices. It covers:
   • Preparation: Specific procedures for running MDM on diskless/tapeless systems, systems with RF-series ISA or hard disks, and dual-host configurations.
   • Starting MDM: Instructions for manually booting or autobooting the diagnostics, particularly from a TK70 tape cartridge.
   • MDM Main Menu Options: Details on how to perform a general system test, display system configuration and device information, access system utilities (like IOADDRES or updating RRD40 drive unit numbers), view the service menu (for qualified service personnel), and select tests for individual devices.
   • Exiting MDM: Procedures to properly exit the diagnostic monitor and reboot the system software.

Appendix A: VAX 4000 Controls and Indicators provides diagrams illustrating the physical controls and indicators on the VAX 4000 Model 300 system to assist in troubleshooting.

The document emphasizes contacting a Digital service representative if the suggested troubleshooting steps do not resolve the issue. It also includes standard copyright, trademark, and FCC compliance information.