Page 3 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. © 1997 Compaq Computer Corporation.
Page 5: Symbols And Conventions
Compaq Deskpro 4000S and 4000N 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 4000S and 4000N Series of Personal Computers without notice.
Page 6: Technician Notes
Technician Notes WARNING: Only authorized technicians trained by Compaq should attempt to repair this equipment. All troubleshooting and repair procedures are detailed to allow only subassembly/module level repair. Because of the complexity of the individual boards and subassemblies, no one should attempt to make repairs at the component level or to make modifications to any printed wiring board.
Page 7 RODUCT ESCRIPTION This chapter describes the model offerings and features of the Compaq Deskpro 4000S and 4000N Series of Personal Computers. Figure 1-1. Compaq Deskpro 4000S and 4000N Series Personal Computers Compaq Deskpro 4000S and 4000N Personal Computers...
Page 8 P55C/233 1.44-MB std 20X max 2.1-GB 32-MB 256-MB 256-KB S3/KV2** * P55C is an Intel Pentium Processor with MMX Technology. **S3 Enhanced 64-bit Graphics. Table 1-2 Deskpro 4000N Models Configuration Processor/ Standard Maximum Internal Internal Code Speed* Hard Drive Memory...
Page 9 1.44-MB Optional (replaces 1.44-MB drive) 120-MB (LS-120) Hard drive, capacity in GB Standard, EIDE with drive fault prediction 1.6 (Deskpro 4000N), 2.1 (Deskpro 4000S) Optional, Ultra ATA with drive fault prediction* 2.4, 4.3 Optional Ultra SCSI 2.1, 4.2 CD-ROM drive (Deskpro 4000S only)
Page 10: Design Overview
Compaq Enhanced keyboard with MS Windows-specific keys Standard Design Overview The Compaq Deskpro 4000S and 4000N Series of Personal Computers are designed to use a pan- type chassis to house the system board, expansion boards, power supply, and mass storage devices.
Page 11: Preloaded Software
Order the Support Software CD for Compaq Desktop Products. This compact disc contains the latest device drivers, utilities, and flashable ROM images needed to run MS-DOS, Windows 3.1, Windows 95, Windows NT 3.51 and 4.0, IBM OS/2, and NetWare on the Compaq commercial desktop product.
Page 12: Intelligent Manageability
When calling Compaq to place an order, be sure to have the serial number of the computer available. The location of the serial number is shown in Chapter 5. This number is necessary for all purchases. 1.4.2 Intelligent Manageability Intelligent Manageability combines innovative hardware technology with PC LAN management tools to make Compaq computers easier to inventory, troubleshoot, protect, and maintain.
Page 13 Local Alert message containing a description of the fault and any recommended actions. You can then view current system health by using Compaq Insight Personal Edition. If the computer is connected to a network managed by Compaq Insight Manager or other SNMP-based management products, the computer also sends a fault notice to the network management application.
Page 14 The FailSafe Boot Block ROM allows for system recovery in the event of a ROM flash failure. Remote Security Management allows the system administrator to set or modify security features on remote Compaq Deskpro 4000S and 4000N computers, directly from the centralized network management console.
Page 15 Compaq Integrated Software include bundles of appropriate support software ready for automated installation on top of an off-the-shelf Microsoft operating system. Integrated software is available in two formats: the Support Software CD for Compaq Desktop, Portable, and Workstation Products and the Compaq World Wide Web site.
Page 16: External Computer Features
External Computer Features The Compaq Deskpro 4000S and 4000N Series of Personal Computers ship with a mouse and keyboard. A Compaq color monitor or other compatible monitor, which is also required to operate the computer, must be purchased separately. 1.5.1 Front Panel Controls and LEDs Figure 1-2.
Page 17: Drive Positions
1.5.2 Drive Positions Figure 1-3. Drive Positions on the Compaq Deskpro 4000S Computer Table 1-6 Drive Positions Drive Configuration Standard 3.5-inch, third-height, 1.44-MB diskette drive* 5.25-inch drive bay for optional Slimline CD-ROM drive only* Standard hard drive (3.5-inch, third-height) *Deskpro 4000S models only.
Page 18: Rear Panel Connectors And Indicators
1.5.3 Rear Panel Connectors and Indicators Figure 1-4. Rear Panel Connectors and Indicators Table 1-7 Rear Panel Connectors and Indicators Ref. Component Ref. Component Voltage Select Switch Parallel Connector Ethernet RJ-45 Activity Lights Serial Connector AUI Connector Ethernet RJ-45 Connector Mouse Connector Keyboard Connector Power Cord Connection...
Page 19: Enhanced Keyboard
Used in combination with another key, its effect depends on the software application you are using. Windows Application Key Opens a context menu for the software program you are using. Compaq Deskpro 4000S and 4000N Personal Computers 1-13...
Page 20: Select Options
The keyboard has feet on the bottom that enable the user to tilt the keyboard to a more comfortable typing angle. Figure 1-6. Keyboard Tilt Foot Select Options Select options that are available from Compaq for the Compaq Deskpro 4000S and 4000N Series of Personal Computers are described briefly in the following sections. 1.7.1 Monitors...
Page 21 1.7.2 Modems 33.6-K Modem 56-K Modem (NA only) SpeedPaq ISDN Modem Compaq Netelligent Corporate Communicator (NA only) Compaq Deskpro 4000S and 4000N Personal Computers 1-15...
Page 23: Getting Ready
ONFIGURATION AND IAGNOSTIC TILITIES This chapter contains descriptions of Compaq utilities that can be helpful when servicing the Compaq Deskpro 4000S and 4000N Personal Computers. These utilities include: Configuration and Diagnostics ROMPaq Compaq Intelligent Manageability Compaq Insight Manager NT Support Software Diskette See Appendixes D, E, and F for error codes, error messages, and other troubleshooting techniques.
Page 24: Create A Diagnostics Diskette
5. Turn the computer on. 6. Create a diagnostics diskette (Section 2.1.2). If you are using a Deskpro 4000N, you may either download the diagnostics program from a second computer onto the hard drive of the 4000N or run diagnostics from that second computer.
Page 25 F10 when it appears. You may also restart the computer using the Ctrl+Alt+Del key combination to access the F10 message. 3. Press Enter to bypass the title and welcome screens. The Compaq Utilities menu appears. The Compaq Utilities menu offers the following options:...
Page 26 To load either of the diskettes, complete the following steps: 1. Turn off the Deskpro 4000N. 2. Connect a second computer to the Deskpro 4000N using only a null modem cable connected to the serial ports on the rear panels of both computers.
Page 27: Computer Setup
If the diagnostics software is deleted, you will no longer be able to access the Configuration and Diagnostics menu. Deskpro 4000N If this is a Deskpro 4000N, refer to Section 2.1.3 for use of a diskette drive, then follow the procedure above. Computer Setup Computer Setup is used to configure Compaq PCI- or ISA-based computers and is selected from the Configuration and Diagnostics Menu.
Page 28 The Computer Setup screen includes two buttons: Built-In Devices and Add-In Devices. The following tables list the options available under each of the two buttons: Table 2-1 Built-In Devices Sub-Menu Button Configuration Option Sub-Menu Button Configuration Option Video Driver and Resolution System Information Processor Storage...
Page 29: Security Features
To establish a password in Windows 95, complete the following steps: 1. Click the My Computer icon. 2. Click the Control Panel folder. 3. Double-click the Passwords icon and follow the instructions to set a new password. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 30 Establishing a Power-On Password Using Computer Setup Establishing a power-on password through Computer Setup prevents access to the computer when power is turned on, unless the password is entered. The password must be entered each time the computer is turned on, when the key icon ( ) appears on the monitor.
Page 31 Swedish/Finnish Brazilian Japanese Swiss Chinese Korean Taiwanese Czech Latin American Thai Danish Norwegian Turkish French Polish U.K. English French Canadian é Portuguese U.S. English German Russian * For Bosnia-Herzegovina, Croatia, Slovenia, and Yugoslavia Compaq Deskpro 4000S and 4000N Personal Computers...
Page 32 Disabling the Passwords If you do not know the power-on password, you may bypass it and the setup password by setting the SW1-S1 switch on the system board to the ON position. To establish new passwords, set the S1 switch to the OFF position, clear CMOS, and go to F10 Setup. Figure 2-1.
Page 33 For security reasons, the characters you type do not appear on the screen. The application will not be affected by the characters typed. To ensure security with QuickLock/QuickBlank it is recommended that you also disable the USB ports. Compaq Deskpro 4000S and 4000N Personal Computers 2-11...
Page 34 TEST is optional, but recommended, after you install or connect a new device. To save, print, or display the information generated by TEST. It is recommended that you run TEST and have the printed report available before placing a call to the Compaq Customer Support Center.
Page 35 To view information about the system once it has been configured. To save, print, or display the information generated by INSPECT. It is recommended that you run INSPECT and have the printed report available before placing a call to the Compaq Customer Support Center.
Page 36 Compaq Enhanced Insight Personal Edition (Compaq Diagnostics for Windows) utility contains the same functionality as the partition-based INSPECT program, but in a Windows environment. To use the Compaq Diagnostics for Windows utility in Windows 95, select the Compaq Diagnostics icon from the Control Panel.
Page 37: Exiting The Compaq Utilities Menu
Exiting the Compaq Utilities Menu To exit the Compaq Utilities menu, follow the instructions on the screen prompts. Power-On Self-Test (POST) POST is a series of diagnostic tests that run automatically when the system is turned on. Clean Boot surpresses most system messages during POST, such as memory count and non-error text messages.
Page 38 ROM (Read Only Memory). Flash ROM Lock, set to its default setting of OFF, protects the Flash ROM from being upgraded and the System BIOS from being updated. To update the ROM, order the ROMPaq diskette from Compaq or download it from the Compaq World Wide Web site.
Page 39 To upgrade the ROM, complete the following steps: 1. Turn off the Deskpro 4000N. 2. Connect a second computer to the Deskpro 4000N using only a null modem cable connected to the serial ports on the rear panels of both computers.
Page 40 To recover the system after hearing the FailSafe Boot Block beeps, complete the following steps: 1. Turn off the Deskpro 4000N. 2. Connect a second computer to the Deskpro 4000N using only a null modem cable connected to the serial ports on the rear panels of both computers.
Page 41: Compaq Intelligent Manageability
The Local Alert Pop-Up Dialog notifies you of an impending or actual hardware failure. It the computer is connected to a network and the Compaq Insight Management Desktop Agents are installed and configured, an SNMP trap (message) is sent to the specified SNMP-compliant management application.
Page 42: Compaq Insight Manager
2.10 Compaq Insight Manager Compaq Insight Manager is a client/server software application you can use to remotely manage and receive information about Compaq computers. Insight Manager remotely gathers information about computers needing service; for example, Insight Manager can inform you if computer components are experiencing failure or prefailure errors.
Page 43 Before installing the Insight Agents on the Compaq Deskpro 4000N Personal Computer, be sure to install SNMP service and SNMP trap service (for Windows NT) from the Microsoft CD. See installation instructions provided on the CD.
Page 44: Prefailure Warranty
2.11 NT Support Software Diskette The NT Support Software Diskette (SSD) is a set of Compaq-specific drivers that enable the Deskpro 4000S and 4000N Personal Computers to operate at optimum performance. Updates are available on the Compaq Web site (http://www.compaq.com) and are also available through subscription to the Compaq Support Software CD.
Page 45 LLUSTRATED ARTS ATALOG This chapter provides an illustrated parts breakdown and a reference for spare parts for the Compaq Deskpro 4000S and Deskpro 4000N Series of Personal Computers. Figure 3-1. Compaq Deskpro 4000S and 4000N Series of Personal Computers Compaq Deskpro 4000S and 4000N Personal Computers...
Page 46 System Unit Figure 3-2. System Unit Spares Illustrated Parts Catalog...
Page 47 (Deskpro 4000S) 1. Hood assembly, includes hood, front bezel, hood release latch buttons, hood 308348-001 release springs, and required screws (Deskpro 4000N)* 2. Expansion board cage, includes backplane, slot cover, and required screws 288398-001 (Deskpro 4000S) 2.
Page 48 Parts Kits Figure 3-3. Part Kits Components Illustrated Parts Catalog...
Page 49 Screw, M2.5 x .45 high top (5 ea) f. Screw, #4-40 x 5/16 slide latch (5 ea) g. Foot (4 ea) h. Power supply pivot bracket (2 ea) *Deskpro 4000S only. **Not illustrated. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 50 Miscellaneous Parts Figure 3-4. Miscellaneous Parts Illustrated Parts Catalog...
Page 51 Description Spare Part Number Warranty Tier 1. Two-button mouse 141189-401 2. Compaq Multimedia Sound System, includes speaker, cable, board, and 294122-001 software - US (Deskpro 4000S only) 2. Compaq Multimedia Sound System, includes speaker, cable, board, and 294122-022 software - Europe (Deskpro 4000S only)* 2.
Page 52 Mass Storage Devices Figure 3-5. Mass Storage Devices Illustrated Parts Catalog...
Page 53 3. 20X max IDE Slimline CD-ROM Drive (Deskpro 4000S only) 288445-001 4. 2.1-GB EIDE Hard Drive (Deskpro 4000S only) 288449-001 5. 1.6-GB EIDE Hard Drive (Deskpro 4000N only) 308347-001 5. 2.4-GB Ultra ATA Hard Drive* 296679-001 6. 2.1-GB Ultra SCSI Hard Drive* 247409-001 7.
Page 54 Cables Figure 3-6. Cables 3-10 Illustrated Parts Catalog...
Page 55 13. Cable, RJ-45 connector* 290663-001 14. Cable, power adapter for LS-120 (Deskpro 4000S only)* 186423-001 15. Cable, data for LS-120 (Deskpro 4000S only)* 247568-001 *Not illustrated. **Not illustrated and not a spare part number. Compaq Deskpro 4000S and 4000N Personal Computers 3-11...
Page 56 Standard and Optional Boards Figure 3-7. Standard and Optional Boards Table 3-6 Standard and Optional Boards Description Spare Part Number Warranty Tier 1. System board with MMX Technology, with tray, w/o processor 288426-001 2. System board with MMX Technology with tray, w/o processor (Brazil)* 288426-201 3.
Page 57 17. Soundboard with wave table (ISA board) (Deskpro 4000S only) 166575-001 18. Compaq PCI Ultra SCSI Controller, use with 247485-001 cable* 247399-001 19. Compaq ISA Plug and Play SCSI Controller, use with 184118-001 cable 184751-001 (Deskpro 4000S only) 20. 33.6 K/56 Baud Modem (Deskpro 4000S only)* 294912-001 21.
Page 58 Keyboards Figure 3-8. Enhanced Keyboard 3-14 Illustrated Parts Catalog...
Page 59 13. Compaq Enhanced Keyboard - Hungarian* 166514-211 14. Compaq Enhanced Keyboard - International* 166514-B31 15. Compaq Enhanced Keyboard - Italian* 166514-061 16. Compaq Enhanced Keyboard - Latin American Spanish* 166514-161 17. Compaq Enhanced Keyboard - Norwegian* 166514-091 18. Compaq Enhanced Keyboard - Polish* 166514-241 19.
Page 60 Monitors Figure 3-9. Compaq Monitors 3-16 Illustrated Parts Catalog...
Page 61 Monitors Description Spare Part Number Warranty Tier 1. Compaq 140 Color Monitor, NA* 210507-601 2. Compaq 140 Color Monitor , EMEA * 210507-602 2. Compaq 140 Color Monitor, SH* 210507-603 2. Compaq 140 Color Monitor , GSA * 210507-604 2. Compaq 140 Color Monitor, NH* 210507-606 3.
Page 62 Table 3-8 Continued Description Spare Part Number Warranty Tier 12. TFT500, 15.1-inch Flat Panel Display - repair parts listed below: Power supply* 296473-001 Monitor base* 296474-001 Cable access cover* 296475-001 Rear enclosure* 296476-001 Shield/support bracket* 296477-001 Controller assembly* 296478-001 TFT-LCD panel assembly* 296481-001 Backlight bulbs (2 ea)* 296480-001...
Page 63: Shipping Boxes
Shipping box, Compaq 140 Color Monitor (5 ea) 210538-001 Return kit, Compaq TFT500, 15.1-inch Flat Panel Display 285010-001 Shipping box and packing, Compaq V90 Color Monitor (Return kit) US only 305627-001 Shipping box and packing, Compaq V90 Color Monitor International 305627-002...
Page 64 Users Guide, V40 Color Monitor* 295504-001 Users Guide, Sound System (use with 166575-001)* 294111-001 Users Guide, Modem, US* 183467-001 Users Guide, Compaq TFT500 Color Monitor* 285012-001 Users Guide, Microsoft Windows NT 3.51 Danish 183987-081 Users Guide, Microsoft Windows NT 3.51, Dutch 183987-331 Users Guide, Microsoft Windows NT 3.51, English...
Page 65 Microsoft Windows NT 3.51 CD-ROM, Italian 183993-061 Microsoft Windows NT 3.51 CD-ROM, Japanese 183993-191 Microsoft Windows NT 3.51 CD-ROM, Latin American Spanish 183993-161 Microsoft Windows NT 3.51 CD-ROM, Norwegian 183993-091 Microsoft Windows NT 3.51 CD-ROM, Swedish 183993-101 Compaq Deskpro 4000S and 4000N Personal Computers 3-21...
Page 67: Electrostatic Discharge Information
Networks built into many integrated circuits provide some protection, but in many cases, the discharge contains enough power to alter device parameters or melt silicon junctions. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 68: Generating Static
4.1.1 Generating Static Table 4-1 shows how different activities generate static electricity at different electrostatic voltage levels. Table 4-1 Typical Electrostatic Voltages Relative Humidity Event Walking across carpet 35,000 V 15,000 V 7,500 V Walking across vinyl floor 12,000 V 5,000 V 3,000 V Motions of bench worker...
Page 69: Grounding Workstations
Use fixtures made of static-safe materials when fixtures must directly contact dissipative surfaces. Keep work area free of nonconductive materials such as ordinary plastic assembly aids and Styrofoam. Use field service tools, such as cutters, screwdrivers, and vacuums, that are conductive. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 70: Recommended Materials And Equipment
4.1.5 Recommended Materials and Equipment Materials and equipment that are recommended for use in preventing static electricity include: Antistatic tape Antistatic smocks, aprons, or sleeve protectors Conductive bins and other assembly or soldering aids Conductive foam Conductive tabletop workstations with ground cord of one-megohm +/- 10% resistance Static-dissipative table or floor mats with hard tie to ground Field service kits Static awareness labels...
Page 71: Routine Care
Visible debris underneath or between the keys may be removed by vacuuming or shaking. Canned, presurized air may be used to clean debris from under the keys. Caution should be used as too much air pressure can dislodge lubricants applied under the wide keys. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 72: Service Considerations
If an incorrect screw is used during the reassembly process, it can damage the unit. Compaq strongly recommends that all screws removed during disassembly be kept with the part that was removed, then returned to their proper locations.
Page 73: Plastic Parts
Plastic parts can be damaged by the use of excessive force during disassembly and reassembly. When handling the plastic parts, use care. Do not use a screwdriver or similar tool to pry apart the plastic components; use the case utility tool provided in the Compaq tool kit, PN 100767-001. 4.3.6...
Page 75: Serial Number
This chapter provides subassembly/module level removal and replacement procedures for the Compaq Deskpro 4000S and 4000N Series of Personal Computers. All steps described in this chapter may not apply to all models as there are some physical differences between the 4000S and the 4000N.
Page 76: Installing The Personal Computer
Installing the Personal Computer There are three different methods of mounting the computer in a work area: self-mounting, mounting bracket, and the drawer install method. 5.2.1 Self-Mounting Method CAUTION: Do not mount the computer upside down or vertically when using this method. To mount the computer directly to a work area, complete the following steps: 1.
Page 77 CAUTION: Carefully clean the cavity of the chassis to remove any foreign particles before reinstalling the computer components. 13. Reinstall the balance of the computer components and the system unit cover. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 78: Mounting Bracket Method
5.2.2 Mounting Bracket Method CAUTION: Do not mount the computer upside down when using this method. To install the optional mounting bracket, complete the following steps: 1. Position the mounting bracket in the desired area and mark through the mounting holes to accurately locate where the fasteners will be installed.
Page 79: Drawer Installation Method
4. There should be at least one inch of clear space below the drawer to ensure proper air flow if there are vent holes in the bottom of the mounting drawer. 5. There should also be at least one inch of clear space above the top of the chassis. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 80: Table Of Contents
Disassembly Sequence Chart Use the chart below to determine the disassembly sequence for removing components from the computer. Preparation for Disassembly Computer Feet Cable Lock System Unit Cover Latch Retainer Expansion Board Cage 5.10 Expansion Board 5.11 Easy Access Power Supply 5.12 System Board 5.13.1...
Page 81: Preparation For Disassembly
During disassembly, label each cable as you remove it, noting its position and routing. Keep all screws with the units removed. CAUTION: The screws used in the computer are of different thread sizes and lengths; using the wrong screw in an application may damage the unit. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 82: Computer Feet
Computer Feet Four rubber feet are mounted to the underside of the chassis. To attach replacement feet to the chassis, remove the protective strip from the adhesive on the back of the new feet and press them into place. If necessary, scrape the residue of the old feet from the chassis using a small, flat-bladed screwdriver.
Page 83: Cable Lock
Install a cable lock (not provided) to secure the computer to a secure place. Figure 5-5. Installing the Cable Lock To remove the cable lock provision, reverse the above procedure. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 84 The cable lock provision may be used with the mounting bracket option. Figure 5-6. Using the Cable Lock With the Mounting Bracket 5-10 Removal and Replacement Procedures...
Page 85: System Unit Cover
2. Press in the quick release cover latch on each side of the front bezel to release the hood latches. 3. Slide the cover forward about 1-inch (2.5-cm); then, lift it up and off the unit. Figure 5-7. Removing the System Unit Cover To replace the cover, reverse the above procedure. Compaq Deskpro 4000S and 4000N Personal Computers 5-11...
Page 86: Latch Retainer
Latch Retainer To remove the latch retainer, complete the following steps: 1. Prepare the computer for disassembly (Section 5.4). 2. Remove the system unit cover (Section 5.7). 3. Rotate the Easy Access Drive Cage to its upright position. 4. Remove the retaining screw that secures the latch retainer to the side of the chassis and remove the latch.
Page 87: Expansion Board Cage
To replace the expansion board cage, reverse the above procedure. When installing the expansion board cage, ensure that the tab on the cage latches into the slot on the side of the power supply. Compaq Deskpro 4000S and 4000N Personal Computers 5-13...
Page 88: Expansion Board
5.10 Expansion Board The Deskpro 4000N has a single PCI expansion slot while the 4000S has both a PCI and an ISA slot. To remove the expansion board, complete the following steps: 1. Prepare the computer for disassembly (Section 5.4).
Page 89: Easy Access Power Supply
5. Release the power cables from the cable tie on the side of the chassis. Figure 5-11. Positioning the Cables on the Rear of the Drive Cage (Deskpro 4000S Shown) Compaq Deskpro 4000S and 4000N Personal Computers 5-15...
Page 90 6. Loosen the two screws that secure the power supply hinge bracket 1 to the side of the chassis and slide the bracket to the rear to disengage it from the power supply. It is not necessary to remove the hinge bracket for this operation. 7.
Page 91: System Board
CAUTION: Check the position of all cables and wires before raising or lowering the drive cage to prevent cable damage. 5. Disconnect all cables from the system board. 6. Rotate the power supply to an upright position. Compaq Deskpro 4000S and 4000N Personal Computers 5-17...
Page 92 7. Slide the system board with the tray out of the chassis. If a replacement external battery is installed on the system board, do not unplug the battery from the system board connector as that will erase the CMOS. Remove the external battery from the hook-and-loop fastener on the chassis but leave it electrically connected to the system board.
Page 93: System Board Components
6. Slide the system board about 1- to 2-inches (2.5- to 5.1-cm) out of the rear of the chassis. It is not necessary to disconnect any cables from the system board for this operation. Compaq Deskpro 4000S and 4000N Personal Computers 5-19...
Page 94 7. Press outward on both latches of the DIMM socket at the same time. This releases the module and partially pushes it out of the socket. 8. Lift the module from the socket. Figure 5-14. Removing a Memory Module To replace a DIMM, reverse the above steps. CAUTION: Check the position of all cables and wires before raising or lowering the drive cage to prevent cable damage.
Page 95 6. Release the processor from the socket by pulling the handle on the ZIF socket out and upward 4. 7. Lift the processor 5 out of the socket. Figure 5-15. Removing the Microprocessor from the System Board Compaq Deskpro 4000S and 4000N Personal Computers 5-21...
Page 96 CAUTION: When replacing the processor, be sure the clipped corner of the processor (location of Pin 1) is aligned with the triangular area of the ZIF socket (marked * on the system board). Failure to do so could result in burning out both the processor and the system board. The handle on the ZIF socket in the picture may not look identical to the one on the computer.
Page 97: Replacement Battery
The battery is soldered into place and may not be removed. Do not abuse or disassemble. Use only replacement batteries supplied by Compaq Computer Corporation. It is important to make a set of backup diagnostic diskettes before you install a new battery.
Page 98 To avoid the risk of electrical shock or damage to the equipment, do not disable this feature. 10. Turn on the computer. 11. Run the computer Setup utility to reconfigure the system. Refer to Chapter 2, “Compaq Utilities.” 5-24...
Page 99: Power Switch Cable Components
5. Remove the switch mounting bracket assembly from the chassis by squeezing the tab on top of the bracket and then lifting the bracket up and out of the chassis. Figure 5-17. Disconnecting the Switch Cable Compaq Deskpro 4000S and 4000N Personal Computers 5-25...
Page 100 This is marked on the rear of the mounting bracket. CAUTION: Compaq does not recommend removing the switch from the mounting bracket. To install the switch cable assembly, reverse the above steps.
Page 101: Switch Mounting Bracket Assembly
The two parts are spared as unassembled components and must be assembled prior to installation. CAUTION: Compaq does not recommend removing the switch from the mounting bracket. To assemble the components, complete the following steps: 1. Align the switch with the opening in the back of the mounting bracket and push the two pieces together.
Page 102: System Unit Cover Assembly
5.16 System Unit Cover Assembly The system unit cover assembly consists of the hood, front bezel, cover pusher springs, power button, bezel blank, and the Compaq logo. 5.16.1 System Unit Cover Release Buttons To remove the release buttons, complete the following steps 1.
Page 103: Power Button
The spring will follow the button out of the housing. Figure 5-20. Removing the Power Button (Deskpro 4000S Shown) To replace the power button, reverse the above procedure. Compaq Deskpro 4000S and 4000N Personal Computers 5-29...
Page 104: Bezel Blank
5.16.3 Bezel Blank This operation applies to the Deskpro 4000S only. To remove the bezel blank, complete the following steps: 1. Prepare the computer for disassembly (Section 5.4). 2. Remove the system unit cover (Section 5.7). 3. Set the system unit cover with the top down on a protected work surface. Squeeze together the sides of the right end of the bezel blank to release the catches.
Page 105: Mass Storage Devices
Slimline CD-ROM drive. The Deskpro 4000N computer has only a single 3.5-inch third height drive bay that houses the standard hard drive. No other drives may be installed in this computer.
Page 106 4. Pull the drive release latch on the right side of the drive towards the center of the adjacent drive bays and slide the drive to the rear of the bay; then, lift the drive from the bay. Figure 5-23. Removing the 3.5-inch Diskette Drive When replacing this drive, transfer the four guide screws that take the place of drive rails from the old drive to the new one.
Page 107 If you are replacing the drive in this bay, continue with step 3. If you are installing a new drive, continue with step 6. 3. Disconnect the CD-ROM adapter from the back of the drive. Figure 5-24. Disconnecting the CD-ROM Adapter and the Flat Ribbon Cable from the CD-ROM Drive Compaq Deskpro 4000S and 4000N Personal Computers 5-33...
Page 108 4. Pull the drive release latch on the left side of the drive towards the center of the adjacent drive bays and slide the drive to the rear of the bay; then, lift the drive from the bay. Figure 5-25. Removing the CD-ROM Drive When replacing this drive, transfer the four screws that take the place of drive rails from the old drive to the new one.
Page 109 8. If this is a new installation, raise the drive cage to the upright position and connect the flat ribbon cable to the system board. Figure 5-26. Connecting the Flat Ribbon CD-ROM Cable to the System Board Compaq Deskpro 4000S and 4000N Personal Computers 5-35...
Page 110 CAUTION: Check the position of all cables and wires before raising or lowering the drive cage to prevent cable damage. 9. Return the drive cage to the normal position. 10. If you have installed an audio board to the computer, attach the audio cable from the system board at J11 to the audio board at this time.
Page 111 14. The system will automatically recognize the Slimline CD-ROM drive sold by Compaq and then automatically reconfigure the computer. If you have installed a third-party hard drive that is not a Plug and Play device, you will need to run Computer Setup to reconfigure the computer. Refer to Chapter 2, “Configuration and Diagnostic Utilities,”...
Page 112: Inch Hard Drive
5.17.3 3.5-Inch Hard Drive This section applies only to the Deskpro 4000S. The 3.5-inch hard drive is located on the right side of the computer, in the lower position. To remove the drive, complete the following steps: 1. Prepare the computer for disassembly (Section 5.4). 2.
Page 113 CAUTION: When servicing the computer, ensure that cables are placed in their proper locations during the reassembly process. Improper cable placement can damage the computer. CAUTION: Use only 3/16-inch or 5-mm long screws as guide screws. Longer screws can damage the internal components of the drive. Compaq Deskpro 4000S and 4000N Personal Computers 5-39...
Page 114: Easy Access Drive Cage
5.18 Easy Access Drive Cage To remove the Easy Access Drive Cage from the computer chassis, complete the following steps: 1. Prepare the computer for disassembly (Section 5.4). 2. Remove the system unit cover (Section 5.7). 3. Remove the drives from the drive cage (Section 5.18). 4.
Page 115 UMPER WITCH NFORMATION This chapter provides connector, jumper, and switch information for system board jumpers, system I/O board connectors, and hard drives for the Compaq Deskpro 4000S and 4000N Series of Personal Computer. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 116 System Board 6.1.1 Connectors, Jumpers, and Switches Figure 6-1. System Board Overview Table 6-1 Connectors, Jumpers, and Switches Item Description Item Description Diskette Drive Connector Processor Speed Switches Primary IDE Connector Power Supply Connector LS-120 Connector AUI Connector CD-ROM Connector Riser Board Socket Audio Connector DIMM Socket...
Page 117: Switch Settings
Doing this could result in unreliable operation or processor damage. Table 6-2 Switch SW1 Password Control Action Disable Password Enable Password (Default setting) Table 6-3 Switch SW1 Processor Speed* Processor Speed 166-MHz 200-MHz 233-MHz *66 MHz bus speed. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 118: System Board Jumpers
System Board Jumpers This section provides information for setting jumpers for enabling/disabling passwords and clearing the configuration (CMOS). When you change a security feature, you will need to reset a jumper and reconfigure the computer to recognize this change. If the system configuration is incorrect, your computer may not work properly and you may receive error messages on the screen.
Page 119: Jumper Locations
6. Run the Computer Setup utility to reconfigure the system. When the jumper is removed, both the power-on password and the setup password become invalid because both are stored in the configuration memory. You will need to reset the passwords. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 120: Hard Drives
Refer to Chapter 5 for complete instructions on installing a replacement rtc battery. Hard Drives For more information about Compaq hard drives, refer to Appendix C in this guide. For more information about using SCSI devices, refer to Appendix D.
Page 121 2.4-GB IDE Hard Drive Jumper Settings Refer to the Fujitsu and Western Digital drawings and tables above. 6.3.4 4.3-GB Ultra ATA Hard Drive Jumper Settings Refer to the Fujitsu drawing and table above. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 122 6.3.5 2.1-GB External Ultra SCSI Hard Drive Jumper Settings Figure 6-6. Jumper Positions for the 2.1-GB Ultra SCSI Hard Drive Table 6-6 SCSI ID, Jumpers for Pins 17 - 22 SCSI ID Pins 21 - 22 Pins 19 - 20 Pins 17 - 18 Table 6-7 Options, Jumpers for Pins 1 - 16...
Page 123 9 - 10 Termonation Enable 17 - 18 RSVD2 11 - 12 LED PWR 19 - 20 RSVD3 13 - 14 WAIT SPIN Table 6-10 Pin Descriptions, Jumper J5 Termination Power Termination Enable Compaq Deskpro 4000S and 4000N Personal Computers...
Page 124 6-10 Connector, Jumper, and Switch Information...
Page 125 8% to 90% 8% to 90% Nonoperating 5% to 95% 5% to 95% Maximum Altitude (unpressurized) Operating 10,000 ft 3048 m Nonoperating 30,000 ft 9144 m Heat Dissipation (nominal) 325 Btu/hr 1.36 kg-cal/min Compaq Deskpro 4000S and 4000N Personal Computers...
Page 126: System Interrupts
Table 7-2 System Interrupts Hardware IRQ System Function IRQ 0 Timer Interrupt (Not on ISA Bus) IRQ 1 Keyboard (Not on ISA Bus) IRQ 2 Interrupt Controller Cascade (Not on ISA Bus) IRQ 3 Unused IRQ 4 Serial Port (COM 1) IRQ 5 Unused IRQ 6...
Page 127 100 - 12F Unused 130 - 131 Unused 132 - 16F Unused 170 - 177 Reserved 178 - 1EF Unused 1F0 - 1F7 Fixed Disk Controller 1F8 - 1FF Unused Unused Unused Continued Compaq Deskpro 4000S and 4000N Personal Computers...
Page 128 Table 7-4 continued I/O Address (Hex) System Function (Shipping Configuration) 202 - 21F Unused 220 - 22F Unused 230 - 277 Unused 278 - 27F Reserved Parallel Port 280 - 2E7 Unused 2E8 - 2EF Reserved Serial Port 2F0 - 2F7 Unused 2F8 - 2FF Reserved Serial Port...
Page 129 000C7FFFh to 000C0000h Video ROM 128 KB 000BFFFFh to 000A0000h Video RAM 640 KB 0009FFFFh to 00000000h Base Memory All memory above the first 256 MB is non-cacheable. All PCI memory is non-cacheable. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 130: Mb Diskette Drive
Drives Table 7-6 1.44-MB Diskette Drive (Deskpro 4000S Only) Size and Capacity Size (in) High Density (MB) 1.44 Low Density (KB) Compaq Spare Part Number 160788-001 Light Green Height One-third Bytes per Sector Sectors per Track High Density Low Density...
Page 131 Logical Sectors per Track Logical Buffer Size (KB) *Because the Compaq Utilities are installed on a hidden partition on the hard drive, hard drive capacity will appear reduced when displayed by the computer. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 132 CD-ROM mode1, mode 2 Mixed mode (audio and data combined) CD-DA Photo CD (single and multi-session) CDi ready CD-XA ready Compaq Spare Part Number 288445-001 Disc Diameter 12 cm, 8 cm Capacity 550-MB, mode 1, 12-cm; 640-MB, mode 2, 12-cm; 180-MB, 8cm...
Page 133: Audio System
µlaw 8-/16-bit Mono/stereo 16-bit Keyboard Table 7-10 Compaq Enhanced Keyboard U.S. Metric Dimensions Height 1.50 in 3.81 cm Width 18.00 in 45.72 cm Depth 6.50 in 16.51 cm Weight 3.5 lb 1.59 kg Compaq Deskpro 4000S and 4000N Personal Computers...
Page 134: Button Mouse
Mouse Table 7-11 2-Button Mouse U.S. Metric Dimensions Height 1.34 in 3.4 cm Length 4.45 in 11.3 cm Width 2.36 in 6.0 cm Weight 4.59 oz 130 g Base Resolution 400 dpi 400 dpi Tracking Speed (maximum) 10 in/sec 25 cm/sec Temperature Operating 32°F to 104°F...
Page 135 This appendix contains the pin assignments for all external connectors. Table A-1 Keyboard Connector and Icon (Orange) Signal Data Unused Ground +5 VDC Clock Unused Table A-2 Mouse Connector and Icon (Green) Signal Data Unused Ground +5 VDC Clock Unused Compaq Deskpro 4000S and 4000N Personal Computers...
Page 136: Parallel Interface
Table A-3 Parallel Interface Connector and Icon 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...
Page 137 Vertical Sync Data Clock (SCL)* * For DDC support (I 2 C monitors) Table A-6 Ethernet RJ-45 Connector and Icon Signal (+) Transmit Data (-) Transmit Data (+) Receive Data Unused Unused (-) Receive Data Unused Unused Compaq Professional Workstation A-3...
Page 138 Table A-7 Ethernet AUI Connector and Icon Signal Ground Negative AUI Differential Collision Positive AUI Differential Collision Negative AUI Differential Transmit Positive AUI Differential Transmit Ground Ground Negative AUI Differential Receive Positive AUI Differential Receive +12V Ground Ground Not Used Not Used Not Used Not Used...
Page 139 Line-Out Audio Connector Connector and Icon Signal Inside Data Outside Ground Table A-10 Microphone Connector Connector and Icon (Blue) Signal Inside Data Outside Ground Table A-11 Headphone Connector Connector and Icon Signal Inside Data Outside Ground Compaq Professional Workstation A-5...
Page 140 Table 1-12 IDE CD-ROM Cable Signal Signal RESDRV_ IOCHRDY CABLE SELECT IO16 PDIAG CS1FX CS3FX DASP AUDIO_R AUDIO_L A_GND_R A_GND_L (KEY) +5VMOT1 DREQ +5VMOT2 +5VMOT3 +5VMOT4 +5VMLOG1 +5VMLOG2 Connector Pin Assignments...
Page 141 CS1FX CS3FX DASP +5VMLOG +5VMOT AUDIO_L A_GND_R A_GND_L AUDIO_R FP01 FP02 FP03 FP04 FP05 FP06 (KEY) FP07 FP08 FP09 FP10 FP11 FP12 FP13 IOCHRDY FP14 CABLE SELECT FP15 FP16 FP17 FP18 IO16 FP19 FP20 PDIAG FP21 Compaq Professional Workstation A-7...
Page 143: General Requirements
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.
Page 144 Country-Specific Requirements Power Cord Set Requirements–By Country Country Accrediting Agency Applicable Note Numbers Australia EANSW Austria Belgium CEBC Canada Denmark DEMKO Finland SETI France Germany Italy Japan Norway NEMKO Sweden SEMKO Switzerland United Kingdom United States Notes: 1. The flexible cord must be <HAR> Type HO5VV-F, 3-conductor, 1.0 mm conductor size.
Page 145 SMART The SMART IDE hard drives for the Compaq Deskpro 4000S and 4000N Series of 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.
Page 147: Diagnostic Error Codes
Diagnostics program. These error codes help identify possibly defective subassemblies. Table D-1 lists the device codes (AABB-CC) and the subtest range (AABB-CC) covered by Compaq Diagnostics Tests. Some codes will not apply to the computers described in this manual and will not be detailed in the tables that follow.
Page 148 Tables D-2 through D-18 list possible error codes, descriptions of each error condition, and actions required to resolve the error condition. Retest the system after completing each step. If the problem has been resolved, do not proceed with the remaining steps. For assistance in the removal and replacement of a particular subassembly, see Chapter 5, "Removal and Replacement Procedures."...
Page 149 1. Connect the printer. 0402-xx Printer port test failed. 2. Check power to the printer. 0403-xx Printer pattern test failed. 3. Install the loop-back connector and retest. 4. Replace system board and retest. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 150 Table 4-6 Diskette Drive Test Error Codes Error Code Description Recommended Action 0600-xx Diskette ID drive types test failed. The following steps apply to error codes 0600-xx through 0610-xx: 1. Replace the diskette media and retest. 0601-xx Diskette format failed. 2.
Page 151 Tape drive BOT/EOT test failed. 5. Replace the tape drive and retest. 1905-xx Tape drive read test failed. 6. Replace the system board and retest. 1906-xx Tape drive write/read/compare failed. 1910-xx Tape erase test failed. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 152 Table 4-11 Video Test Error Codes Error Code Description Recommended Action 2401-xx 1. Replace the video board and retest. Graphics controller test failed. 2. Replace the system board and retest. 2402-xx Video memory test failed. The following steps apply to error codes 2402-xx through 2419-xx: 1.
Page 153 Network external test failed.* 6054-xx Network configuration test failed.** 6056-xx Network reset test failed.** 6068-xx Network internal test failed.** 6069-xx Network external test failed.** 6089-xx Network open test failed.** * Ethernet on;y. **Token Ring only. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 154 Table 4-14 SCSI CD-ROM Test Error Codes Error Code Description Recommended Action 6600-xx ID test failed. The following steps apply to error codes error codes 6600-xx through 6623-xx: 1. Replace the CD media and retest. 6605-xx Read test failed. 2. Check the jumper settings on the adapter board. 6608-xx Controller test failed.
Page 155 65XX-XX Hard Drive 66XX-XX CD-ROM Drive and PD-CD Drive 67XX-XX Tape Drive Table 4-17 SCSI Test Names XX00-XX XX05-XX Read XX06-XX SA/Media XX08-XX Controller XX09-XX Media erase XX23-XX Random read XX28-XX Media load/unload Compaq Deskpro 4000S and 4000N Personal Computers...
Page 156 Table 4-18 SCSI Test Error Codes Error Code Description Recommended Action XXXX-02 Drive not installed. Check cable connections. XXXX-03 Media not in drive. Check for and install DATA CD or write-enabled tape in drive. XXXX-05 Seek failure. Replace the indicated device. XXXX-06 Drive timed out.
Page 157 1. Ensure proper air flow. XXXX-91 Over Temperature. 2. Perform required maintenance and cleaning. 1. Install tape(s) in autoloader tape drive according to test XXXX-99 Autoloader reported tapes not instructions. loaded properly. 2. Change autoloader magazine. Compaq Deskpro 4000S and 4000N Personal Computers D-11...
Page 159 Cache memory controller or RAM Run the Configuration and Diagnostics controller failure failure. utilities. 207-ECC corrected single bit Single Bit ECC error Replace DIMM if error persists. error * L = Long, S = Short Continued Compaq Deskpro 4000S and 4000N Personal Computers...
Page 160 Table E-1 Continued Message Beeps* Probable Cause Recommended Action 213-Incompatible DIMM Replace DIMM module 301-Keyboard Error None Keyboard failure. Reconnect keyboard with computer turned off. 301-Keyboard Error or None Keyboard failure. Replace the keyboard. Test Fixture Installed 1. Reconnect keyboard with computer turned off. 303-Keyboard Controller None I/O board keyboard controller.
Page 161 Check that computer air vents are not specification. blocked and cooling fan is running. Invalid Electronic None Electronic serial number has become Run Computer Setup. Serial Number corrupted. Audible Power-on successful. None. * L = Long, S = Short Compaq Deskpro 4000S and 4000N Personal Computers...
Page 163: Troubleshooting Without Diagnostics
Have all jumper settings been set as instructed by the configuration utility? Was Computer Setup run after installing options (memory, disk drives, expansion boards, etc.) and before installing industry standard architecture (ISA) boards? Compaq Deskpro 4000S and 4000N Personal Computers...
Page 164: Power Problems
Power Problems This section identifies some quick checks for power-related problems. Table F-1 Solutions for Power Problems Problem Possible Solution Computer will not turn on. Ensure that the computer is connected to a power source. Cables to the external power source are unplugged. Ensure that cables connecting the computer and the external source are plugged in properly.
Page 165: Diskette Drive Problems
Tools. In Windows 95, run Scan Disk. At the Start menu, highlight Programs, select Accessories, then select System Tools. Non-system disk message. Remove the diskette from the drive. Check the cables for loose connections. Drive not found. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 166: Display Problems
Display Problems This section identifies some quick checks for display-related problems. Table F-3 Solutions for Display Problems Problem Possible Solution Screen is blank. 1. Monitor is not turned on and the monitor light is not on. Turn on the monitor and check that the monitor light is on.
Page 167: Printer Problems
Alternatively, before running the test, you can configure the test options to send the results to a local printer or file. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 168 Solutions for some typical hard drive problems are presented in Table F-5. Table F-5 Solutions for Hard Drive Problems Problem Possible Solution Hard drive error occurs. Hard disk has bad sectors or has failed. Use a utility to locate and block usage of bad sectors.
Page 169: Hardware Installation Problems
If the system has two serial devices plus a modem, then the first serial device can be COM1 or COM2 or disabled, the modem can be COM1 or COM2 or disabled, and the second serial device can be COM4 or disabled. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 170 CD-ROM Drive Problems This section identifies some quick checks for CD-ROM drive-related problems. Table F-7 CD-ROM Drive Problems Problem Possible Solution 1. CD is not properly seated in the drive. Eject the CD, correctly seat it in the drive, Cannot read compact disc. then reload.
Page 171: Memory Problems
Ensure that drive cabling and jumpers are set correctly. To drive. correctly. boot a SCSI drive, the drive ID number must be set to 0. Units with both IDE and SCSI devices will not boot from a SCSI drive. Compaq Deskpro 4000S and 4000N Personal Computers...
Page 172: Network Problems
Network Problems Some common causes and solutions for network problems are listed in the following table. These guidelines do not discuss the process of debugging network cabling. Table F-10 Network Problems Problem Cause Solution System does not detect a Possible I/O address conflict Factory default is 300h to 30Fh for Ethernet.
Page 173 2. The cable is not securely connector and that the other end of the cable is securely connected. attached to the correct device. 3. The network controller 3. Replace the network controller or system board. is defective. Compaq Deskpro 4000S and 4000N Personal Computers F-11...
Page 174: Resolving Audio Hardware Conflicts
Resolving Audio Hardware Conflicts Hardware conflicts occur when two or more peripheral devices contend for the same signal lines or channels. Conflicts between the audio interface and another peripheral device may be due to the settings of the base I/O addresses, interrupts, or DMA channels. The audio interface typically has the following settings: Table F-11 Audio Interface Settings...

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