DECserver 300 Problem Solving

This document is a technical manual for the DECserver 300 terminal server, intended to assist server managers in troubleshooting hardware and software issues.

The manual provides comprehensive guidance on:

• Troubleshooting Tools: Utilizing the console port, interpreting the seven-segment status display (which shows status and error codes), and executing internal TEST commands (TEST SERVICE, TEST PORT, and TEST LOOP).
• Problem Isolation: Procedures for determining if an issue is related to all ports, individual port devices, service nodes, or the Ethernet interface.
• Error Analysis: Detailed explanations of error messages that appear on the console terminal, along with step-by-step corrective actions for various failure scenarios, such as down-line loading failures, configuration mismatches, and hardware defects.
• Support: Guidelines for contacting Digital Equipment Corporation for technical service, including instructions on how to handle up-line memory dumps for software debugging and how to prepare equipment for shipping.