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Compaq DeskPro EN SM AppA.pdfappendix A Pin 1 2 3 4 5 6 CONNECTOR PIN ASSIGNMENTS This appendix contains the pin assignments for all external connectors. Some of the connectors may not be used on the computer being serviced. Enhanced Keyboard Connector and Icon Signal Data Unused Ground +5 VDC Clock Unused 6 4 KEY 5 3 2 1 Mouse Connector and Icon Pin 1 2 3 4 5 6 Signal Data Unused Ground +5 VDC Clock Unused 6 4 KEY 5 3 2 1 Ethernet BNC Connector and Icon Pin 1 (Inside) 2 (Outside) Signal Data Ground Compaq Deskpro EN Series of Personal Computers A-1 Parallel Interface Connector and Icon Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18-25 Signal Strobe Data Bit 0 Data Bit 1 Data Bit 2 Data Bit 3 Data Bit 4 Data Bit 5 Data Bit 6 Data Bit 7 Acknowledge Busy Paper End Select Auto Linefeed Error Initialize Printer Select IN Signal Ground 13 12 11 10 9 8 7 6 5 4 3 2 1 25 24 23 22 21 20 19 18 17 16 15 14 Serial Interface Connector and Icon Pin 1 2 3 4 5 6 7 8 9 Signal Carrier Detect Receive Da
Compaq DeskPro EN SM AppB.pdfappendix B POWER CORD SET REQUIREMENTS The voltage select switch feature on the computer permits it to operate from any line voltage between 100-120 or 220-240 volts AC. The power cord set received with the computer meets the requirements for use in the country where you purchased the equipment. Power cord sets for use in other countries must meet the requirements of the country where you use the computer. For more information on power cord set requirements, contact your authorized Compaq dealer, reseller, or service provider. General Requirements The requirements listed below are applicable to all countries: 1. The length of the power cord set must be at least 6.00 feet (1.8 m) and a maximum of 9.75 feet (3.0 m). 2. All power cord sets must be approved by an acceptable accredited agency responsible for evaluation in the country where the power cord set will be used. 3. The power cord set must have a minimum current capacity of 10A and a nominal voltage rating of 125 or 250 volts AC
Compaq DeskPro EN SM AppC.pdfappendix C HARD DRIVES Compaq Computer Corporation uses IDE hard disk drives that conform to two different primary/secondary implementations. These are Conner mode and ATA-compatible mode. These two modes are incompatible with one another. Device 0/Device 1 Relationship A device 0/device 1 relationship exists when there are two hard drives connected to a single port. In this situation, one drive must be designated as the device 0 or primary drive and the other as the device 1, or secondary drive. This designation is necessary because both drives cannot work simultaneously. SMART The SMART IDE hard drives for the Compaq Deskpro Personal Computers have built-in drive failure prediction that warns the user or the network administrator of an impending failure or crash of the hard drive. Automatic Soft-Drive Types An automatic soft-drive type is a mechanism where the system ROM and Computer Setup automatically build a soft-drive type to provide support for IDE hard drives that are not
Compaq DeskPro EN SM AppD.pdfappendix D Beeps* 1L, 1S POST ERROR MESSAGES An error message results if the Power-On Self-Test (POST) encounters a problem. This test runs when the system is turned on, checking assemblies within the computer and reporting any errors found. Screen Message 101-ROM Error Probable Cause System ROM checksum. Recommended Action Flash the ROM. Replace the system board. 101-Option ROM Checksum Error 1L, 1S Option ROM checksum. Run Computer setup (F10 Setup). Verify the correct ROM. Flash ROM if applicable. Replace optional expansion card. 102-System Board Failure None DMA, timers, etc. Clear CMOS. Pull expansion cards. Replace the system board. 162-System Options Not Set 2S Configuration incorrect. RTC (real-time clock) battery may need to be replaced. Battery life is approximately 5 years. CMOS jumper may not be properly installed. Run Computer Setup (F10 Setup). Reset the date and time under Control Panel. If the problem persists, replace the RTC battery. Check for proper p
Compaq DeskPro EN SM AppE.pdfappendix E DIAGNOSTIC ERROR CODES Diagnostic error codes occur if the system recognizes a problem while running the Compaq Diagnostics program. These error codes help identify possibly defective subassemblies. Diagnostic error messages consist of three components, AABB-CC, where AA = Device Code BB = Subtest Code CC = Error Code The following table lists the device codes (AABB-CC) and the subtest code (AABB-CC) covered by Compaq Diagnostics Tests. Some codes listed in this table will not apply to the computers described in this manual and will not be detailed in the tables that follow. Summary of Test Error Codes Error Code Range 0100 - 0199 0200 - 0210 0301 - 0304 0401 - 0498 0501 - 0516 0600 - 0699 0802 - 0824 1101 - 1109 1201 - 1210 1700 - 1799 1800 - 1823 1900 - 1906 2113 - 2199 2402 - 2480 2502 - 2502 Device Description Processor (P1) Memory Keyboard Parallel Port Video Display Unit Diskette Drive Monochrome Video Board Serial Port Modem Hard Drive CD-ROM Tape Drive Second Pro
Compaq DeskPro EN SM AppF.pdfappendix F TROUBLESHOOTING WITHOUT DIAGNOSTICS Preliminary Checklist This section describes some simple, preliminary tests and guidelines for troubleshooting the computer without using the diagnostics. If you encounter some minor problem with the computer or a software application, go through the following checklist for possible solutions before running any of the diagnostic utilities: n n n n n n n n n n n n n n Are the computer and monitor connected to a working electrical outlet? Is the computer turned on? Is the green power light illuminated? Is the monitor turned on? Is the green monitor light illuminated? Turn up the monitor brightness and contrast controls if the monitor is dim. Press and hold any key. If the system beeps, then the keyboard should be operating correctly. Check all cables for loose or incorrect connections. Reconfigure the computer after installing a non plug and play expansion board or other option, such as a diskette drive. Are all of the necessary device dr
Compaq DeskPro EN SM AppG.pdfappendix G Component P/S connector Second P/S connector (as required) Third P/S connector (as required) Main Power HDD LED connector Speaker connector Audio connector (from CD-ROM Second fan connector WOL connector (NIC cable) Diskette drive connector Second Audio connector AUI connector Primary IDE connector Secondary IDE connector Video memory upgrade connector Primary SCSI Connector Secondary SCSI connector ITP connector Primary processor socket Secondary processor socket processor CMOS header Video pass through header Memory slot The first slot populated (DIMM1 or RIMM1) and tested. Following memory slots BNC RJ-45 Jack IEEE 1394 ISA slots PCI slots Riser board Device bay connectors continued SYSTEM BOARD AND RISER BOARD REFERENCE DESIGNATORS Designator P1 P2 P3 P5 P6 P7 P8 P9 P10 P11 P15 P20 P21 P25 - P26 P30 P31 P100 XU1 XU2 E50 E51 XMM1 XMM2 - XMM5 J6 J7 J8 J10 - 19 J20 -29 J30 J31 - J35 Compaq Deskpro EN Series of Personal Computers G-1 Reference Designators Continued Desi
Compaq DeskPro EN SM AppH.pdfappendix H Color Green Green Green None Red Red Red Red Red Green Green Green 4 blinks/second On 1 blink/second 1 blink/two seconds On Flashing Flashing Flashing DIAGNOSTIC INDICATOR LIGHTS LED Power Power Power Power Power Power Power Power Power and Hard Drive Num Lock Caps Lock Scroll Lock LED Activity On 1 blink/second 1 blink/second State/Message Computer on Normal suspend mode Suspend to RAM Computer off CPU thermal shutdown CPU not installed/fetching code ROM error Power supply crow bar Riser board not seated Memory error No video System board failure, prior to video Compaq Deskpro EN Series of Personal Computers H-1
Compaq DeskPro EN SM CH1.pdfchapter 1 CAUTION: Do not add optional hardware devices to your computer until the operating system is successfully installed. Doing so may cause errors and may prevent the operating system from installing properly. CAUTION: Once the automatic installation has begun, DO NOT TURN OFF THE COMPUTER UNTIL THE PROCESS IS COMPLETE. Turning off the computer during the installation process might damage the software that runs the computer. INSTALLING THE OPERATING SYSTEM Depending on the model, Microsoft Windows 95, 98, or Microsoft Windows NT is preinstalled on the computer and will be configured automatically the first time the computer is turned on. 1.1 Microsoft Windows 95 or 98 The first time the computer is turned on, Microsoft Windows is automatically installed. This takes approximately 5 to 15 minutes, depending on the system hardware configuration. At the beginning of the installation process, the user is prompted to select the appropriate language for the operating system. Read an
Compaq DeskPro EN SM CH2.pdfchapter 2 SETUP UTILITIES AND DIAGNOSTIC FEATURES Compaq Computer Setup Utilities and diagnostic features provide information needed about the computer system when contacting Compaq Customer Support. These tools can also be used to: n n n n n n Change factory default settings and to set or change the system configuration, which may be necessary when you add or remove hardware. Determine if all of the devices installed on the computer are recognized by the system and functioning properly. Determine information about the operating environment of the computer. Solve system configuration errors detected but not automatically fixed during the PowerOn Self-Test (POST). Establish and manage passwords and other security features. Establish and manage energy-saving timeouts. 2.1. Computer Setup Utilities Use Computer Setup Utilities to do the following: n n n n n Change factory default. Set the system date and time. Set, view, change, or verify the system configuration including settings
Compaq DeskPro EN SM CH3.pdfchapter 3 INTELLIGENT MANAGEABILITY Compaq Intelligent Manageability is the best, most comprehensive set of desktop management solutions in the industry. Providing easy control and management of the desktop and portable PC, Intelligent Manageability delivers significant financial and intangible returns when used to manage distributed PC environments. Intelligent Manageability is built upon industry-standard building blocks, including DMI 2.0, Web-Based Enterprise Management, Intel's "Wired for Management," SNMP, and Net PC technologies. It is tightly integrated with Compaq Management Solutions Partners and Compaq Insight Manager. Intelligent Manageability delivers solutions in five areas of primary concern for today's businesses: n n n n n Initial Configuration and Deployment Asset Tracking and Security Fault Notification and Recovery Software Updating and Management Building Blocks and Partners This section provides an introduction to Intelligent Manageability concepts and feature
Compaq DeskPro EN SM CH4.pdfchapter 4 CAUTION: When the computer is plugged into an AC power source, there is always voltage applied to the system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage. REMOVAL & REPLACEMENT PRELIMINARIES This chapter provides general service information for the computer. Adherence to the procedures and precautions described in this chapter is essential for proper service. 4.1 Electrostatic Discharge Information A sudden discharge of static electricity from your finger or other conductor can destroy staticsensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device exposed to electrostatic discharge (ESD) may not be affected at all and can work perfectly throughout a normal cycle. The device may function normally for a while, then degrade in the internal layers, reducing its life expectancy. Networks built into many integrated circuits pr
Compaq DeskPro EN SM Notice.pdfNotice The information in this guide is subject to change without notice. COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN; NOR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE, OR USE OF THIS MATERIAL. This guide contains information protected by copyright. No part of this guide may be photocopied or reproduced in any form without prior written consent from Compaq Computer Corporation. © 1999 Compaq Computer Corporation. All rights reserved. Printed in the U.S.A. Compaq and Deskpro are registered in the U. S. Patent and Trademark Office. PREMIER·SOUND is a trademark of Compaq Computer Corporation. Microsoft, MS-DOS, Windows, Windows NT, and other names of Microsoft products referenced herein are trademarks or registered trademarks of Microsoft Corporation. Intel and Pentium are registered trademarks of Intel Corporation. Celeron and MMX are trademarks of Intel Corporation. Product names me
Compaq DeskPro EN SM preface.pdfpreface ABOUT THIS GUIDE This Maintenance & Service Guide is a troubleshooting and repair guide that can be used for reference when servicing the Compaq Deskpro EN Series of Personal Computers. Only authorized technicians trained by Compaq should attempt to repair this equipment. Compaq Computer Corporation reserves the right to make changes to the Compaq Deskpro EN Series of Personal Computers without notice. Symbols and Conventions The following text and symbols mark special messages throughout this guide: ! WARNING: Text set off in this manner indicates that failure to follow directions in the warning could result in bodily harm or loss of life. CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of data. Text set off in this manner presents commentary, sidelights, or clarifying information. Technician Notes ! WARNING: Only authorized technicians trained by Compaq should attempt to repair this equipme

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