VAX 4000 Model 105A/106A Troubleshooting and Diagnostics Information

This manual, published by Digital Equipment Corporation in May 1995, provides troubleshooting and diagnostic information for VAX 4000 Model 105A and Model 106A systems. It is intended for users with some computer experience.

The document is structured to guide users through identifying and resolving basic system problems. It begins with a comprehensive troubleshooting procedure, emphasizing initial checks of all physical connections (cables, terminators) and proper power-up sequences. A detailed troubleshooting table is provided, listing various symptoms for system, storage (EF/RF-Series ISE, RRD42/43 Compact Disc Drives), and tape drive (TZ30, TLZ06/07, TZK10/11) issues, along with possible causes and suggested solutions.

The manual then covers diagnostic tests, including automated power-up tests and self-tests that can be run on individual devices using console commands like SHOW CONFIG. Finally, it outlines essential information to collect before contacting Digital Services for further assistance, such as problem descriptions, error messages, failed self-test numbers, status LED displays, and device serial numbers, stressing that only authorized personnel should service the equipment.