A.3 Beep Code Messages; A.2 Power-On Messages; A.1 Introduction; Appendix A Error Messages And Codes - Compaq Deskpro 4000N Technical Reference Manual

Appendix A
ERROR MESSAGES AND CODES
A. Appendix A ERROR MESSAGES AND CODES
A.1

INTRODUCTION

This appendix lists the error codes and a brief description of the probable cause of the error. Note
that not all errors listed in this appendix may be applicable to a particular system depending on
the model and/or configuration.
A.2

POWER-ON MESSAGES

Table A–1. Power-On Messages
Message
CMOS Time and Date Not Set
(none)
Run Setup
A.3

BEEP CODE MESSAGES

Table A–2. Beep Code Messages
Beeps Error
1 Refresh Failure
3 Base 64-KB Memory Failure
4 Timer Not Operational
5 Processor Error
6 8042 Gate A20 Failure
7 Processor Exception Interrupt Error
8 Display Memory R/W Error
9 ROM Checksum Error
10 CMOS Shutdown Register R/W Error
11 Cache Error
Table A-1.
Power-On Messages
Beeps Probable Cause
(None) Invalid time or date
2 short Power-On successful
(None) Any failure
Table A-2.
Beep Code Messages
Changed - Septembe 1997
Technical Reference Guide
Probable Cause
Faulty memory refresh circuitry.
Memory failure in first 64-KB.
Same as above or timer 1 not functioning.
CPU-generated error.
Keyboard controller faulty, BIOS cannot switch to
protected mode.
CPU-generated exception interrupt.
Missing graphics/video adapter or faulty video memory
(system still boots).
Checksum value does not match value in BIOS.
CMOS RAM shutdown register failure.
Faulty cache.
Compaq Personal Computers A-1