Page 1 HP Compaq dx2100 MT Business PC 1st Edition This document provides information on the removal and replacement of all parts as well as information on troubleshooting, Desktop Management, setup utilities, ATA drives, safety, routine care, connector pin assignments, POST error messages, and diagnostic indicator lights.
Page 3 Service Reference Guide HP Compaq dx2100 MT Business PC 1st Edition Document Part Number: 404569-001 November 2005...
Page 4 CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of information. Service Reference Guide HP Compaq dx20100 MT Business PC s First Edition (November 2005) Document Part Number: 404569-001...
Page 5: Table Of Contents
Contents 1 Installing the Operating System 1.1 Microsoft Windows XP ............1–1 1.1.1 Installing or Upgrading Device Drivers .
Page 6 Contents 4.5.1 PATA Device Classes ........... . 4–4 4.6 SATA SMART Drives .
Page 7 Contents 6.9 Front I/O Panel Housing Assembly ..........6–15 6.10Speaker .
Page 8 Contents 404569-001 Service Reference Guide, dx2100 MT...
Page 9: Installing The Operating System
To install optional hardware devices after the OS installation is completed, you must install the device drivers for the device you are installing. The I386 directory and its subdirectories provide the HP- or Compaq-specific integration of the operating system for the computer model and include device drivers supported by the operating system.
Page 10: Converting To Ntfs
English and selected other languages, in one of these ways: www.hp.com HP web site at Restore Plus! CD, which is supplied with many Compaq models Additional HP software may be required in certain situations. 1–2...
Page 11: Setup Utilities And Diagnostics Features
Setup Utilities and Diagnostics Features Setup Utilities (F10) and diagnostic features provide information needed about the computer system when contacting Customer Support. These tools can also be used to: Change factory default settings and to set or change the system configuration, which may be necessary when you add or remove hardware.
Page 12: Computer Setup Utilities
Setup Utilities and Diagnostics Features 2.2 Computer Setup Utilities Use Computer Setup Utilities (F10) to: Modify or restore factory default settings. Set the system date and time. Set, view, change, or verify the system configuration including settings for processor, graphics, memory, audio, storage, communications, and input devices. Modify the boot order of bootable devices such as hard drives, diskette drives, optical drives, or USB devices.
Page 13 Setup Utilities and Diagnostics Features 4. Use the arrow (left and right) keys to select the appropriate heading. Use the arrow (up and Enter down) keys to select the option you want, then press . To return to the Computer Setup Utilities menu, press 5.
Page 14: Computer Setup Menu
Setup Utilities and Diagnostics Features 2.2.2 Computer Setup Menu Heading Option Description System None Lists product name, SKU number, processor type and speed, Information CPU ID, cache size, DDR2 memory size, system ROM, integrated MAC, UUID, system serial number, and asset tag number.
Page 15 Setup Utilities and Diagnostics Features Heading Option Description Standard PATA Ch 0 Master For each, allows you to: (continued) CMOS PATA Ch 0 Slave • run SMART HDD status check and self-test for selected Features channel (available if SMART IDE HDD installed) (continued) (continued) •...
Page 16 Setup Utilities and Diagnostics Features Heading Option Description Standard SATA Ch 0 Master For each, allows you to: CMOS SATA Ch 1 Master • detect HDD size and head on selected channel Features • set extended drive on selected channel to: (continued) •...
Page 17 Setup Utilities and Diagnostics Features Heading Option Description Standard POST Delay Allows you to set a POST delay to: CMOS • 0 seconds Features • 5 seconds (continued) • 10 seconds • 15 seconds • 30 seconds Advanced Device Boot Allows you to restrict a device from booting the unit.
Page 18 Setup Utilities and Diagnostics Features Heading Option Description Advanced HDD S.M.A.R.T. Disables/enables S.M.A.R.T. capability. BIOS Features Capability (continued) Boot Up NumLock Allows you to set the default NumLock status to off or on. Status Security Option Allows you to set the security option to Setup or System so that the password is required every time the system boots or only when entering Computer Setup.
Page 19 Setup Utilities and Diagnostics Features Heading Option Description Advanced Auto Detect PCI Disables/enables PCI clock auto-detection. Chipset Features Spread Spectrum Disables/enables clock spread spectrum. (continued) Integrated USB Controller Disables/enables USB controller. Peripherals USB Legacy Disables/enables USB legacy support function (USB keyboard Support and USB mouse).
Page 20 Setup Utilities and Diagnostics Features Heading Option Description Power Power On After Allows you to select system power loss behavior: Management Power-Fail • Last State Setup • On (continued) • Off MODEM Use IRQ Allows you to select IRQ for MODEM to use. Select NA to disable external MODEM wake-up function.
Page 21 Setup Utilities and Diagnostics Features Heading Option Description PnP/PCI IRQ Resources When resources are controlled manually, allows you to assign each system interrupt a type, depending on the type of device Configurations • IRQ-3 using the interrupt. (continued) assigned to Legacy ISA for devices compliant with the original PC AT bus •...
Page 22: Recovering The Configuration Settings
Setup Utilities and Diagnostics Features Heading Option Description Save & Exit Allows you to save current settings and exit Computer Setup. Setup Exit Without Allows you to exit Computer Setup without saving changes. Saving Support for Computer Setup options may vary depending on your specific hardware configuration. 2.3 Recovering the Configuration Settings Recovering the configuration settings established in the Computer Setup (F10) Utility requires that you first back up the settings before a recovery is needed.
Page 23: Desktop Management
Desktop Management Support for specific features described in this guide may vary by model or software version. Initial Configuration and Deployment HP computers come with a preinstalled system software image. After a brief software “unbundling” process, the computer is ready to be used. A customized software image may be deployed by installing additional software applications after unbundling the preinstalled software image.
Page 24: Dual-State Power Button
Desktop Management 1. Remove all removable media and turn off the power. 2. Insert a diskette containing the desired BIOS image file in the root directory. The media must be formatted using the FAT32 file system. 3. Turn on power to the system. The failsafe Boot Block BIOS will attempt to start the system from a bootable device.
Page 25: World Wide Web Site
Desktop Management 3.2.4 World Wide Web Site When making the transition to new or revised operating systems, it is important to implement the support software designed for that operating system. If you plan to run a version of Microsoft Windows that is different from the version included with your computer, you must install corresponding device drivers and utilities to ensure that all features are supported and functioning properly.
Page 26: Entering A User Password
Desktop Management 2. As soon as the computer is turned on, press and hold the key until you enter Computer Enter Setup. Press to bypass the title screen, if necessary. If you do not press the key at the appropriate time, you must turn the computer off, then on again, and press the key again to access the utility.
Page 27 Desktop Management If you do not press the key at the appropriate time, you must turn the computer off, then on again, and press the key again to access the utility. If you are using a PS/2 keyboard, you may see a Keyboard Error message—disregard it. 3.
Page 28: Surge-Tolerant Power Supply
Desktop Management National Keyboard Delimiter Characters Each keyboard is designed to meet country-specific requirements. The syntax and keys that you use for changing or deleting your password depend on the keyboard that came with your computer. National Keyboard Delimiter Characters Arabic Greek Russian...
Page 29: Serial And Parallel Ata Drive Guidelines And Features
Serial and Parallel ATA Drive Guidelines and Features Serial ATA = SATA Parallel ATA = PATA HP does not support the use of a PATA (IDE) hard drive on this model of computer. SATA Hard Drives Serial ATA Hard Drive Characteristics Number of pins/conductors in data cable Number of pins in power cable Maximum data cable length...
Page 30: Sata Hard Drive Cables
Serial and Parallel ATA Drive Guidelines and Features 4.2 SATA Hard Drive Cables 4.2.1 SATA Data Cable Always use an HP approved SATA 3.0 Gb/s cable as it is fully backwards compatible with the SATA 1.5 Gb/s drives. SATA data cables are susceptible to damage if overflexed. Never crease a SATA data cable and never bend it tighter than a 30 mm (1.18 in) radius.
Page 31: Pata Device Information
Serial and Parallel ATA Drive Guidelines and Features 4.3 PATA Device Information This information applies to optical drives in a computer having one or two SATA drive controllers and a single PATA drive controller. PATA hard drives are not supported on these models. 4.4 PATA Cables 4.4.1 PATA Data Cable Signal...
Page 32: Pata Device Classes
Serial and Parallel ATA Drive Guidelines and Features Each drive attached to a channel must have a drive designation. If a drive is attached to the Device 0 cable position and its cable-select jumper is present, the drive is designated as Device 0. Similarly, if a drive is attached to the Device 1 cable position and its cable-select jumper is present, the drive is designated as Device 1.
Page 33: Sata Bios
Serial and Parallel ATA Drive Guidelines and Features Drive/Partition Capacity Limits Maximum Size File Controller System Type Operating System Partition Drive FAT 32 Windows 2000/ XP 32 GB 128 PB NTFS Windows NT/2000/XP 2 TB 128 PB 4.8 SATA BIOS Windows 2000 and XP Windows 9x, NT, and Linux Enhanced Mode (default BIOS Setting)
Page 34: Native Mode
Serial and Parallel ATA Drive Guidelines and Features 4.8.2 Native Mode The native mode is used to access devices attached to additional ATA controllers and is not supported by many legacy operating systems. Addresses are assigned by PCI Plug-n-Play BIOS and the IRQ is shared with multiple controllers.
Page 35: Identifying The Chassis, Routine Care, And Disassembly Preparation
Identifying the Chassis, Routine Care, and Disassembly Preparation This chapter provides general service information for the computer. Adherence to the procedures and precautions described in this chapter is essential for proper service. Ä CAUTION: When the computer is plugged into an AC power source voltage is always applied to the system board.
Page 36: Electrostatic Discharge Information
Identifying the Chassis, Routine Care, and Disassembly Preparation 5.2 Electrostatic Discharge Information A sudden discharge of static electricity from your finger or other conductor can destroy static- sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device exposed to electrostatic discharge (ESD) may not appear to be affected at all and can work perfectly throughout a normal cycle.
Page 37: Personal Grounding Methods And Equipment
Identifying the Chassis, Routine Care, and Disassembly Preparation 5.2.3 Personal Grounding Methods and Equipment Use the following equipment to prevent static electricity damage to equipment: Wrist straps are flexible straps with a maximum of one-megohm ± 10% resistance in the ground cords.
Page 38: Routine Care
Identifying the Chassis, Routine Care, and Disassembly Preparation Static awareness labels Wrist straps and footwear straps providing one-megohm +/- 10% resistance Material handling packages Conductive plastic bags Conductive plastic tubes Conductive tote boxes Opaque shielding bags Transparent metallized shielding bags Transparent shielding tubes 5.3 Routine Care 5.3.1 General Cleaning Safety Precautions...
Page 39: Cleaning The Keyboard
Identifying the Chassis, Routine Care, and Disassembly Preparation 5.3.3 Cleaning the Keyboard Follow all safety precautions in Section 5.3.1, “General Cleaning Safety Precautions,” before cleaning the keyboard. To clean the tops of the keys or the keyboard body, follow the procedures described in Section 5.3.2, “Cleaning the Computer Case.”...
Page 40: Service Considerations
Torx T-15 screwdriver with small diameter shank (for certain front bezel removal) Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver) Diagnostics software Compaq tamper-resistant T-15 wrench (Smart Cover FailSafe Key, PN 166527-001) or Compaq tamper-resistant bits (Smart Cover FailSafe Key, PN 166527-002) 5.4.3 Screws The screws used in the computer are not interchangeable.
Page 41: Cables And Connectors
Identifying the Chassis, Routine Care, and Disassembly Preparation 5.4.4 Cables and Connectors Most cables used throughout the unit are flat, flexible cables. These cables must be handled with care to avoid damage. Apply only the tension required to seat or unseat the cables during insertion or removal from the connector.
Page 42 Identifying the Chassis, Routine Care, and Disassembly Preparation 5–8 404569-001 Service Reference Guide, dx2100 MT...
Page 43: Removal And Replacement Procedures-Microtower (Mt) Chassis
Removal and Replacement Procedures— Microtower (MT) Chassis Adherence to the procedures and precautions described in this chapter is essential for proper service. After completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all components operate properly. Not all features listed in this guide are available on all computers.
Page 44: Access Panel
Removal and Replacement Procedures— Microtower (MT) Chassis 6.2 Access Panel 1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”). Ä CAUTION: Before removing the computer access panel, ensure that the computer is turned off and that the power cord is disconnected from the electrical outlet. 2.
Page 45: Front Bezel
Removal and Replacement Procedures— Microtower (MT) Chassis 6.3 Front Bezel 1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”). 2. Remove the access panel (Section 6.2, “Access Panel”). 3. Press down on the three tabs on the left side of the bezel so they release from the chassis. The bezel will rotate out slightly from left to right.
Page 46: Front Drive Bezels
Removal and Replacement Procedures— Microtower (MT) Chassis 6.4 Front Drive Bezels 1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”). 2. Remove the access panel (Section 6.3, “Front Bezel”). 3. Remove the front bezel (Section 6.3, “Front Bezel”). 6.4.1 5.25"...
Page 47: Memory
Removal and Replacement Procedures— Microtower (MT) Chassis 6.5 Memory For more information on the memory in this series of computers, refer to Appendix E, “Memory.” 6.5.1 Installing Memory Modules Ä CAUTION: The memory module sockets have gold metal contacts. When upgrading the memory, it is important to use memory modules with gold metal contacts to prevent corrosion and/or oxidation resulting from having incompatible metals in contact with each other.
Page 48 Removal and Replacement Procedures— Microtower (MT) Chassis 5. Push the module down into the socket, ensuring that the module is fully inserted and properly seated. Make sure the latches are in the closed position 3. 6. Repeat steps 4 and 5 for any additional modules that you want to install. To reassemble the computer, reverse the removal procedure.
Page 49: Expansion Cards
Removal and Replacement Procedures— Microtower (MT) Chassis 6.6 Expansion Cards 6.6.1 Expansion Slot Cover Lock 1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”). 2. Remove the right access panel (Section 6.2, “Access Panel”). 3. Lay the computer down on its side to make it easier to work on. 4.
Page 50 Removal and Replacement Procedures— Microtower (MT) Chassis 9. With the card aligned so the mounting bracket will fit firmly against the computer backwall 1, slide the expansion card into the expansion socket and press it firmly into place 2. When you install an expansion card, make sure you press firmly on the card so that the entire connector seats properly in the expansion card socket.
Page 51: Cable Management
Removal and Replacement Procedures— Microtower (MT) Chassis 6.7 Cable Management Always follow good cable management practices when working inside the computer. Keep cables away from major heat sources like the heatsink. Do not jam cables on top of expansion cards or memory modules.Printed circuit cards like these are not designed to take excessive pressure on them.
Page 52: Cable Connections
Removal and Replacement Procedures— Microtower (MT) Chassis 6.7.1 Cable Connections Cable Cable Designator Power Supply System board Power Supply 1st SATA Hard drive Power Supply System board, 24-pin Power Supply CPU power, 4-pin Power Supply 1st Optical drive Power Supply 2nd Optical drive Power Supply 2nd SATA Hard drive...
Page 53: Drives
CAUTION: Make sure personal files on the hard drive are backed up to an external storage device before removing the hard drive. Failure to do so will result in data loss. After replacing the primary hard drive, you will need to run the Restore Plus! CD to load the Compaq factory-installed files. 6.8.1 Drive Positions...
Page 54: Removing A 5.25" Drive
Removal and Replacement Procedures— Microtower (MT) Chassis 6.8.2 Removing a 5.25" Drive 1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”). 2. Remove the access panel (Section 6.2, “Access Panel”). 3. Remove the front bezel (Section 6.3, “Front Bezel”).
Page 55: Removing A Hard Drive
Removal and Replacement Procedures— Microtower (MT) Chassis 6.8.3 Removing a Hard Drive 1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”). 2. Remove the access panel (Section 6.2, “Access Panel”). 3. Remove the front bezel (Section 6.3, “Front Bezel”).
Page 56: Removing A 3.5" Diskette Drive
Removal and Replacement Procedures— Microtower (MT) Chassis 6.8.4 Removing a 3.5" Diskette Drive 1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”). 2. Remove the access panel (Section 6.2, “Access Panel”). 3. Remove the front bezel (Section 6.3, “Front Bezel”).
Page 57: Front I/O Panel Housing Assembly
Removal and Replacement Procedures— Microtower (MT) Chassis 6.9 Front I/O Panel Housing Assembly 1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”). 2. Remove the access panel and rotate the computer so the system board is parallel to the table to make it easier to work on (Section 6.1, “Preparation for Disassembly”).
Page 58: Speaker
Removal and Replacement Procedures— Microtower (MT) Chassis 6.10 Speaker 1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”). 2. Remove the access panel (Section 6.2, “Access Panel”). 3. Remove the front bezel (Section 6.3, “Front Bezel”). 4. Disconnect the speaker cable from the system board. 5.
Page 59: System Fan
Removal and Replacement Procedures— Microtower (MT) Chassis 6.11 System Fan 1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”). 2. Remove the access panel (Section 6.2, “Access Panel”). 3. Disconnect the cable that connects the system fan to the system board. 4.
Page 60: Heatsink
Removal and Replacement Procedures— Microtower (MT) Chassis 6.12 Heatsink 1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”). 2. Remove the access panel (Section 6.2, “Access Panel”). 3. Lay the computer down on its side to make it easier to work on. 4.
Page 61: Processor
Removal and Replacement Procedures— Microtower (MT) Chassis 6.13 Processor 1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”). 2. Remove the access panel cover (Section 6.2, “Access Panel”). 3. Disconnect the heatsink control cable from the system board and remove the heatsink. Section 6.12, “Heatsink”...
Page 62 Removal and Replacement Procedures— Microtower (MT) Chassis 6. If using a new heatsink, remove the protective covering from the bottom of the heatsink and place it in position atop the processor. 7. Secure the heatsink to the system board and system board tray with the 4 captive screws and attach the heatsink control cable to the system board.
Page 63: System Board
Removal and Replacement Procedures— Microtower (MT) Chassis 6.14 System Board 1. Prepare the computer for disassembly (Section 6.1, “Preparation for Disassembly”). 2. Remove the access panel (Section 6.2, “Access Panel”). 3. Remove the front bezel (Section 6.3, “Front Bezel”). 4. Disconnect the power, and data cables from the back of all installed drives. 5.
Page 64: Battery
Batteries, battery packs, and accumulators should not be disposed of together with the general household waste. In order to forward them to recycling or proper disposal, please use the public collection system or return them to HP/Compaq, their authorized partners, or their agents. Ä...
Page 65: 1Type 1 Battery Holder
Removal and Replacement Procedures— Microtower (MT) Chassis 6.15.1 Type 1 Battery Holder 1. Lift the battery out of its holder. 2. Slide the replacement battery into position, positive side up. 3. The battery holder automatically secures the battery in the proper position. 4.
Page 66: 2Type 2 Battery Holder
Removal and Replacement Procedures— Microtower (MT) Chassis 6.15.2 Type 2 Battery Holder 1. To release the battery from its holder, squeeze the metal clamp that extends above one edge of the battery. When the battery pops up, lift it out 1. 2.
Page 67: Type 3 Battery Holder
Removal and Replacement Procedures— Microtower (MT) Chassis 6.15.3 Type 3 Battery Holder 1. Pull back on the clip 1 that holds the battery in place, then remove the battery 2. 2. Insert the new battery and position the clip back in place. 3.
Page 68: Power Supply
Removal and Replacement Procedures— Microtower (MT) Chassis 6.16 Power Supply Å WARNING: Voltage is always present on the system board when the computer is plugged into an active AC outlet. To avoid possible personal injury and damage to the equipment the power cord should be disconnected from the computer and/or the AC outlet before opening the computer.
Page 69: Connector Pin Assignments
Connector Pin Assignments This appendix contains the pin assignments for many computer and workstation connectors. Some of these connectors may not be used on the product being serviced. Enhanced Keyboard Connector and Icon Signal Data Unused Ground +5 VDC Clock Unused Mouse Connector and Icon...
Page 70: Parallel Interface
Connector Pin Assignments Parallel Interface Connector and Icon Signal Signal Signal Strobe Data Bit 5 Select Data Bit 0 Data Bit 6 Auto Linefeed Data Bit 1 Data Bit 7 Error Data Bit 2 Acknowledge Initialize Printer Data Bit 3 Busy Select IN Data Bit 4...
Page 71 Connector Pin Assignments Headphone Connector and Icon (1/8" miniphone) Signal 1 (Tip) Audio_Left 1 2 3 2 (Ring) Audio_Right 3 (Shield) Ground Line-In Audio Connector and Icon (1/8" miniphone) Signal 1 (Tip) Audio_In_Left 1 2 3 2 (Ring) Audio_In_Right 3 (Shield) Ground Line-Out Audio Connector and Icon (1/8"...
Page 72 Connector Pin Assignments ATA/ATAPI (IDE) Standard Drive Cable Connector Signal Signal Signal Reset DMAK Ground DD14 Ground INTRQ DD15 IOCS16 Ground (Key) PDIAG (cable detect) DMARQ DD10 Ground DIOW CS1FX DD11 Ground CS3FX DIOR DASP DD12 Ground Ground IORDY DD13 CSEL 24-Pin Power Connector...
Page 73: General Requirements
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.
Page 74 Power Cord Set Requirements Country-Specific Requirements Additional requirements specific to a country are shown in parentheses and explained below. Accrediting Accrediting Country Agency Country Agency Australia (1) EANSW Italy (1) Austria (1) Japan (3) METI Belgium (1) CEBC Norway (1) NEMKO Canada (2) Sweden (1)
Page 75: Post Error Messages
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. Not all computers use all of the codes listed. Recommended Actions are to be taken in incremental steps.
Page 76 POST Error Messages POST Error Messages Screen Message Probable Cause Recommended Action Primary Master/Slave Primary Master/Slave Reseat the device data and power Hard Disk Error hard drive could not be cables. initialized by the BIOS. Replace the device data cable. Replace the device.
Page 77 POST Error Messages POST Error Messages Screen Message Probable Cause Recommended Action Microcode Error BIOS could not find or Ensure the system board BIOS supports load the CPU microcode the processor. update to the CPU. Change system board jumper on JP2 to pins 2-3 (Unlock), then flash the system BIOS.
Page 78 POST Error Messages POST Error Messages Screen Message Probable Cause Recommended Action CMOS Checksum Error. CMOS corrupt or bad Press F1 to save defaults. Defaults Loaded RTC battery. Replace RTC battery. Download the current ROM BIOS from the HP Web and reflash the ROM BIOS. ROM BIOS Checksum ROM BIOS may be Download the most current ROM BIOS...
Page 79: Post Diagnostic Front Panel Leds And Audible Codes
POST Error Messages POST Error Messages Screen Message Probable Cause Recommended Action Non-System Disk or BIOS unable to find a Verify that the device booting from is Disk Error suitable boot device. bootable. Replace as needed. Warning: CPU Fan Has CPU fan weak or not Ensure that the computer air vents are Failed.
Page 80 POST Error Messages POST Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended Action Green Power LED None Computer on. None Green Power LED None Computer in None required. Press any key or move the flashes every two Suspend to RAM mouse to wake the computer.
Page 81 POST Error Messages POST Diagnostic Front Panel LEDs and Audible Codes (Continued) Activity Beeps Possible Cause Recommended Action Power LED flashes Invalid ROM Reflash the ROM with the latest BIOS eight times, once based on bad image. See the “ROM Flash” section of the every second, checksum.
Page 82 POST Error Messages C–8 404569-001 Service Reference Guide, dx2100 MT...
Page 83: Preliminary Checklist
Troubleshooting Without Diagnostics Preliminary Checklist This section describes some simple, preliminary tests and guidelines for troubleshooting the computer without using the diagnostics. Are the computer and monitor connected to a working electrical outlet? Is the voltage select switch is set to the appropriate voltage for your region (115V or 230V)? Is the computer turned on? Is the green power light illuminated? Is the monitor turned on?
Page 84: Solving Minor Problems
Troubleshooting Without Diagnostics Solving Minor Problems Solving Minor Problems Problem Cause Possible Solution Computer appears Software control of the 1. Press and hold the power button locked up and will not power switch is not for at least four seconds until the turn off when the power functional.
Page 85 Troubleshooting Without Diagnostics Solving Minor Problems (Continued) Problem Cause Possible Solution Computer powered off Processor thermal 1. Ensure computer air vents are not automatically and the protection activated: blocked and the cooling fan is Power LED glows for 4 running. A fan may be blocked or seconds followed by a not turning.
Page 86: Solving Power Supply Problems
Troubleshooting Without Diagnostics Solving Power Supply Problems Solving Power Supply Problems Problem Cause Solution Power supply shuts down Voltage selector switch Select the proper AC voltage. intermittently. on rear of computer chassis not switched to correct line voltage. Power supply fault. Replace the power supply.
Page 87: Solving Diskette Problems
Troubleshooting Without Diagnostics Solving Diskette Problems Solving Diskette Problems Problem Cause Solution Diskette drive light stays on. Diskette is damaged. In Microsoft Windows XP, right-click Start, click Explore, and select a drive. Select File > Properties > Tools. Under Error-checking, click Check Now.
Page 88: Solving Hard Drive Problems
Troubleshooting Without Diagnostics Solving Diskette Problems (Continued) Problem Cause Solution A problem has occurred The directory structure is In Windows XP, right-click Start, with a disk transaction. bad, or there is a click Explore, and select a drive. problem with a file. Select File >...
Page 89 Troubleshooting Without Diagnostics Solving Hard Drive Problems (Continued) Problem Cause Solution Drive not found (identified). Loose cable. Check cable connections. The system may not 1. Run Computer Setup. have automatically 2. If the system still does not recognized a newly recognize the new device, installed device.
Page 90 Troubleshooting Without Diagnostics Solving Hard Drive Problems (Continued) Problem Cause Solution Nonsystem disk/NTLDR System files missing or 1. Insert a bootable system diskette missing message. not properly installed. and restart. (continued) 2. Verify hard drive is partitioned and formatted. 3. Install system files for the appropriate operating system if necessary.
Page 91: Solving Display Problems
Troubleshooting Without Diagnostics Solving Display Problems Solving Display Problems Problem Cause Solution Blank screen (no video). The cable connections Check the cable connections from are not correct. the monitor to the computer and to the electrical outlet. Screen blanking utility Press any key or click the mouse installed or energy button and, if set, type your...
Page 92 Troubleshooting Without Diagnostics Solving Display Problems (Continued) Problem Cause Solution Power LED flashes Red six Pre-video graphics For systems with a graphics card: times, once every second, error. 1. Reseat the graphics card. followed by a two second 2. Replace the graphics card. pause, and the computer beeps six times.
Page 93 Troubleshooting Without Diagnostics Solving Display Problems (Continued) Problem Cause Solution High pitched noise coming Brightness and/or Lower brightness and/or contrast from inside a flat panel contrast settings are too settings. monitor. high. Fuzzy focus; streaking, Flat panel monitor’s 1. Select the monitor’s Auto- ghosting, or shadowing internal digital Adjustment option in the...
Page 94: Solving Audio Problems
Troubleshooting Without Diagnostics Solving Audio Problems Solving Audio Problems Problem Cause Solution Sound does not come Software volume control Double-click the Speaker icon on out of the speaker or is turned down. the taskbar and use the volume headphones. slider to adjust the volume. The external speakers Turn on the external speakers.
Page 95 Troubleshooting Without Diagnostics Solving Audio Problems (Continued) Problem Cause Solution Noise or no sound comes 1. If using digital speakers that out of the speakers or have a stereo jack and want the headphones. system to auto-switch to digital, use a stereo-to-mono adapter to properly engage the auto- sense feature or use the multimedia device properties...
Page 96: Solving Printer Problems
Troubleshooting Without Diagnostics Solving Printer Problems Solving Printer Problems Problem Cause Solution Printer will not print. Printer is not turned on Turn the printer on and make sure it and online. is online. The correct printer 1. Install the correct printer driver driver for the for the application.
Page 97: Solving Keyboard And Mouse Problems
Troubleshooting Without Diagnostics Solving Keyboard and Mouse Problems Solving Keyboard Problems Problem Cause Solution Keyboard commands and Keyboard connector 1. Turn off the computer. typing are not recognized is not properly 2. Reconnect the keyboard to the by the computer. connected.
Page 98: Solving Hardware Installation Problems
Troubleshooting Without Diagnostics Solving Hardware Installation Problems You may need to reconfigure the computer when you add or remove hardware, such as an additional diskette drive. If you install a plug and play device, Windows XP automatically recognize the device and configure the computer. If you install a non–plug and play device, you must reconfigure the computer after completing installation of the new hardware.
Page 99 Troubleshooting Without Diagnostics Solving Hardware Installation Problems (Continued) Problem Cause Solution Power LED flashes Red five Memory is installed 1. Reseat DIMMs. times, once every second, incorrectly or is bad. 2. Replace DIMMs one at a time to followed by a two second isolate the faulty module.
Page 100: Solving Network Problems
Troubleshooting Without Diagnostics Solving Network Problems These guidelines do not discuss the process of debugging the network cabling. Solving Network Problems Problem Cause Solution Wake-on-LAN feature is Wake-on-LAN is not Use the Network control application not functioning. enabled. to enable Wake-on-LAN. Network driver does Network controller is Run Computer Setup and enable...
Page 101 Troubleshooting Without Diagnostics Solving Network Problems (Continued) Problem Cause Solution Diagnostics passes, but The network controller Select the Network icon in the the computer does not is not configured for this Control Panel and configure the communicate with the computer. network controller.
Page 102: Solving Memory Problems
Troubleshooting Without Diagnostics Solving Memory Problems Ä CAUTION: For those systems that support ECC memory, HP does not support mixing ECC and non-ECC memory. Otherwise, the system will not boot the operating system. Solving Memory Problems Problem Cause Solution System will not boot or Memory module is not Replace module with the correct does not function properly...
Page 103: Solving Processor Problems
Troubleshooting Without Diagnostics Solving Processor Problems Solving Processor Problems Problem Cause Solution Poor performance is Processor is hot. 1. Make sure the airflow to the experienced. computer is not blocked. 2. Make sure the fans are connected and working properly (some fans only operate when needed).
Page 104 Troubleshooting Without Diagnostics Solving CD-ROM and DVD Problems Solving CD-ROM and DVD Problems Problem Cause Solution System will not boot from The CD-ROM or DVD Run the Computer Setup utility and CD-ROM or DVD drive. boot is not enabled enable booting to removable media through the Computer and verify boot order settings.
Page 105: Solving Drive Key Problems
Troubleshooting Without Diagnostics Solving CD-ROM and DVD Problems (Continued) Problem Cause Solution Recording audio CDs is Wrong or poor quality 1. Try using a slower recording difficult or impossible. media type. speed. 2. Verify that you are using the correct media for the drive. 3.
Page 106 Troubleshooting Without Diagnostics Solving Internet Access Problems (Continued) Problem Cause Solution Unable to connect to the Cable/DSL service is Try connecting to the Internet at a Internet. (continued) not available or has later time or contact your ISP. (If the been interrupted due to cable/DSL service is connected, the bad weather.
Page 107 Troubleshooting Without Diagnostics Solving Internet Access Problems (Continued) Problem Cause Solution Internet takes too long to Modem is not set up Verify that the correct modem speed download Web sites. properly. and COM port are selected. For Windows XP 1. Select Start > Control Panel.
Page 108 Troubleshooting Without Diagnostics POST Diagnostic Front Panel LEDs and Audible Codes This section covers the front panel LED codes as well as the audible codes that may occur before or during POST that do not necessarily have an error code or text message associated with them. If you see flashing LEDs on a PS/2 keyboard look for flashing LEDs on the front panel of the computer and refer to the following table to determine the front panel LED codes.
Page 109 Troubleshooting Without Diagnostics Diagnostic Front Panel LEDs and Audible Codes (Continued) Activity Beeps Possible Cause Recommended Action Power LED flashes Pre-video graphics For systems with a graphics card: six times, once error. 1. Reseat the graphics card. Power on every second, the system.
Page 110 Troubleshooting Without Diagnostics Diagnostic Front Panel LEDs and Audible Codes (Continued) Activity Beeps Possible Cause Recommended Action System does not None System unable to Press and hold the power button for less power on and LEDs power on. than 4 seconds. If the hard drive LED turns are not flashing.
Page 111 Memory Computers equipped with Intel-based processors come with double data rate synchronous dynamic random access memory (DDR-SDRAM) dual inline memory modules (DIMMs). The memory sockets on the system board can be populated with up to four industry-standard DIMMs. These memory module slots are populated with at least one preinstalled memory module.
Page 112: Dimm Sockets
Memory DIMM Sockets There are four DIMM sockets on the system board, with two sockets per channel. The sockets are labeled XMM1, XMM2, XMM3, and XMM4. Sockets XMM1 and XMM2 operate in memory channel A. Sockets XMM3 and XMM4 operate in memory channel B. The system board shown below may be slightly different from the one in the computer.
Page 113 3–1 drive bezel blank 6–4 CMOS Setup Standard 2–4 2–5 2–6 2–7 Compaq software. See software access panel, removal and replacement 6–2 computer ATA/ATAPI (IDE) drive cable pin assignments A– cleaning 5–4 pauses D–2 Computer Setup battery heading real-time clock D–2...
Page 114 Index energy savings, settings for 3–2 entering memory, removal and replacement 6–5 power-on password 3–4 microphone pin assignments A–2 setup password 3–4 monitor error messages, POST C–1 C–5 blank screen D–9 ESD (electrostatic discharge) blurry video D–10 information 5–2 checking connections D–1 materials and equipment 5–3 cleaning 5–5 preventing damage 5–2...
Page 115 Index preinstalled software image 3–1 SDRAM (synchronous dynamic random access preparation for disassembly 6–1 memory) E–1 problems serial interface pin assignments A–2 audio D–12 service considerations 5–6 CD-ROM and DVD D–22 setting diskette D–5 setup password 3–3 3–4 display D–9 timeouts 3–2 Drive Key D–23 setup...
Page 116 Index Index–4 404569-001 Sservice Reference Guide, dx2100 MT...

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Compaq dx2100 mt

HP dx2100 - Microtower PC Service & Reference Manual

1 Installing the Operating System

2 Setup Utilities and Diagnostics Features

3 Desktop Management

4 Serial and Parallel ATA Drive Guidelines and Features

5 Identifying the Chassis, Routine Care, and Disassembly Preparation

6 Removal and Replacement Procedures-Microtower (MT) Chassis

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