Digital Equipment MicroVAX 3100 85 Guida

MicroVAX3100

Model85/95

TroubleshootingandDiagnostic

Information

Order Number: EK–A0719–TM. B01

June 1994

This manual describes the troubleshooting procedures and diagnostic

commands that you can use to solve basic problems with the

MicroVAX 3100 Model 85 and Model 95 systems.

Revision Information: This manual supersedes EK–A0719–TM. A01

Digital Equipment Corporation

Maynard, Massachusetts

June 1994

Digital Equipment Corporation makes no representations that the use of its products in the

manner described in this publication will not infringe on existing or future patent rights, nor do

the descriptions contained in this publication imply the granting of licenses to make, use, or sell

equipment or software in accordance with the description.

Possession, use, or copying of the software described in this publication is authorized only pursuant

to a valid written license from Digital or an authorized sublicensor.

FCC NOTICE: This equipment has been tested and found to comply with the limits for a Class

A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide

reasonable protection against harmful interference when the equipment is operated in a commercial

environment. This equipment generates, uses, and can radiate radio frequency energy and, if not

installed and used in accordance with the instruction manual, may cause harmful interference to

radio communications.

Any changes or modiﬁcations made to this equipment may void the user’s authority to operate this

equipment.

Operation of this equipment in a residential area may cause interference in which case the user

at his own expense will be required to take whatever measures may be required to correct the

interference.

The postpaid Reader’s Comments form at the end of this document requests your critical evaluation

to assist in preparing future documentation.

The following are trademarks of Digital Equipment Corporation: Digital, MicroVAX, OpenVMS, RX,

ThinWire, VAX, VAX DOCUMENT, and the DIGITAL logo.

All other trademarks and registered trademarks are the property of their respective holders.

S2613

This document was prepared using VAX DOCUMENT Version 2.1.

Contents

Preface ................................................ v

1 Troubleshooting and Diagnosing Problems

1.1 Troubleshooting ................................. 1–1

1.2 Using the Troubleshooting Table . . . . . . . . . . . . . . . . . . . . 1–2

1.3 Diagnostic Tests and Commands . . . . . . . . . . . . . . . . . . . . 1–9

1.3.1 Power-UpTests .............................. 1–10

1.3.2 Diagnostic Tests and Utilities . . . . . . . . . . . . . . . . . . . 1–13

1.3.3 Power-Up Error Messages . . . . . . . . . . . . . . . . . . . . . . 1–18

1.3.4 Conﬁguration Display . . . . . . . . . . . . . . . . . . . . . . . . . 1–22

1.3.5 ErrorDisplay................................ 1–24

1.4 Contacting Digital Services . . . . . . . . . . . . . . . . . . . . . . . . 1–25

Index

Examples

1–1 SYNCTestFailure............................ 1–18

1–2 Memory_Setup_CSRs Test Failure . . . . . . . . . . . . . . . . 1–19

1–3 Memory_Count_Pages Test Failure . . . . . . . . . . . . . . . 1–20

1–4 No_Memory_Present Test Failure . . . . . . . . . . . . . . . . 1–21

iii

Figures

1–1 DiagnosticTests.............................. 1–13

1–2 StatusLEDDisplay........................... 1–26

Tables

1–1 Basic Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . 1–3

1–2 OptionCardTests ............................ 1–15

1–3 MicroVAX 4000-100A/105A Tests . . . . . . . . . . . . . . . . . 1–16

Preface

This manual describes the troubleshooting procedures and diagnostic commands

that you can use to solve basic problems with the MicroVAX™ 3100 Model 85 and

Model 95 systems.

Audience

This manual is intended for people who have some experience with computers.

Structure of This Manual

This manual presents the information you need for solving basic problems with

the MicroVAX 3100 Model 85/95 system in one chapter. Use the sections in

the order presented, starting with Section 1.1, Troubleshooting, when solving

a problem with your system. You can follow up with diagnostic testing or by

contacting Digital services for support as described in Section 1.3 and Section 1.4.

Additional Information

See the MicroVAX 3100 Model 85/95 Operator Information manual for the list of

related documents.

Conventions

The following conventions are used in this manual:

Convention Description

MONOSPACE type

Text displayed on the screen is shown in monospace type.

italic type Italic type emphasizes important information and indicates the

complete titles of manuals.

Note A note contains information that is of special importance to the

user.

Warning A warning contains information to prevent personal injury.

Troubleshooting and Diagnosing

Problems

This chapter describes the troubleshooting procedures and diagnostic commands

that you can use to solve basic problems with the MicroVAX 3100 Model 85 and

Model 95 systems. It contains information on the following:

• Troubleshooting

• Diagnostic tests and commands

• Contacting Digital™ services

It also lists the information that you must give to your Digital services

representative and where to ﬁnd this information.

1.1 Troubleshooting

If a problem occurs, you must ﬁrst make sure that all the cables, loopback

connectors, and terminators are correctly connected and that the connectors are

not damaged, for example, the pins may be broken or short-circuited.

Follow these steps:

1. Shut down the operating system by following the procedures described in the

operating system documentation.

2. Turn off the console terminal and all the peripheral devices, such as printers

and modems.

3. Turn off all the expansion boxes.

4. Turn off the system unit.

5. Check that the following cables, if installed, are correctly connected at both

ends and that the connectors are not damaged:

• Console terminal cable (linking the console terminal to the system unit)

• Console terminal power cord

Troubleshooting and Diagnosing Problems 1–1

• System unit power cord

• Expansion box SCSI cables

• Expansion box power cords

• ThinWire™ Ethernet cable or standard Ethernet cable

6. Check that the following terminators, if installed, are correctly connected and

are not damaged:

• SCSI terminators

• ThinWire Ethernet terminator (T-connector and two terminators)

• Standard Ethernet loopback connector

If you have correctly followed steps 1 to 5, the on/off switches on all the

components are set to the off (O) position, and you have solved any problems

caused by incorrectly connected cables or terminators.

7. Set the on/off switches on the following equipment to the on (| ) position in

the following order:

a. Expansion boxes

b. Peripherals

c. Console terminal

d. System unit

The system responds with the power-up test display. If it does not, see

Section 1.2.

1.2 Using the Troubleshooting Table

Table 1–1 suggests the corrective actions for certain system problems. If you have

a problem with the system, follow these steps:

1. Write down the symptoms of the problem.

2. Check the Symptom column in Table 1–1 for a match.

3. Check the causes of the symptom in the Possible Cause column. If the

column lists more than one possible cause, check the possible causes and

their suggested solutions in the order listed.

4. Follow the advice in the Suggested Solution column.

5. See Section 1.4 if the problem persists.

1–2 Troubleshooting and Diagnosing Problems

Table 1–1 Basic Troubleshooting

Symptom Possible Cause Suggested Solution

System Problems

The system unit fan is

off or the power light is

off.

The power cord is not

connected. The power

cord may be faulty. The

power socket may not

be working. The system

breaker or wall outlet

may have blown.

Make sure that all the power cords

are connected correctly at both

ends. Try a known good power cord

or test the power socket with an

appliance that works.

The overload protection

circuitry of the power

supply may have shut

down because of an

abnormal condition on

the power line.

Turn the system off and then turn

it back on.

The power supply unit

(PSU) is faulty. Contact your Digital services

representative.

The power-up display

does not show after 20

seconds.

The terminal cable is

not correctly connected. Make sure that all the cables are

connected at both ends.

The terminal cable is

not connected to the

correct MMJ port.

Check the MMJ port to which the

terminal cable is connected. If this

port is not MMJ port 3, remove the

terminal cable and connect it to

MMJ port 3.

The power cord is not

connected. The power

cord may be faulty. The

wall outlet may not be

working.

Make sure that all the power cords

are connected correctly at both

ends. Try a known good power cord

or test the power socket with an

appliance that works.

The terminal fuse may

have blown. Replace the blown terminal fuse.

See the terminal documentation.

The terminal settings

may be incorrect. See the MicroVAX 3100 Model

85/95 Operator Information

manual for the list of correct

terminal settings. See the terminal

documentation for information on

how to set up the terminal.

(continued on next page)

Troubleshooting and Diagnosing Problems 1–3

Table 1–1 (Cont.) Basic Troubleshooting

Symptom Possible Cause Suggested Solution

System Problems

The port to which the

terminal connects may

be faulty.

Try connecting the terminal to

another system. If this solution

works, the port to which the

terminal was connected is faulty.

If the terminal still does not

operate, it is faulty. In either

case, contact your Digital services

representative.

The terminal cable may

be faulty. Connect the terminal cable and

the terminal to another system.

If the connected terminal works,

the DZ circuitry or MMJ connector

is faulty. Otherwise, the cable

is faulty. Contact your Digital

services representative.

The power-up display

contains question marks. A diagnostic error has

occurred. See Section 1.4.

The power-up test

display contains

unexpected characters.

The terminal settings

are incorrect or the DZ

circuitry is faulty.

Make sure the terminal settings

are correct, then run the power-

up test again. If the terminal is

set correctly, contact your Digital

services representative.

The system fails to boot

the operating system. The system defaults are

incorrectly set. Set the system defaults as

described in the OpenVMS

Factory Installed Software User

Information document, then try

to boot the system again. If

the system still fails to boot,

contact your Digital services

representative.

(continued on next page)

1–4 Troubleshooting and Diagnosing Problems

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