HP dx2420 - Microtower PC Hardware Reference Manual
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HP dx2420 - Microtower PC Hardware Reference Manual

HP dx2420 - Microtower PC Hardware Reference Manual

Microtower business pc
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Hardware Reference Guide - dx2420
Microtower Model
HP Compaq Business PC

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  • Page 1 Hardware Reference Guide - dx2420 Microtower Model HP Compaq Business PC...
  • Page 2 No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Hewlett-Packard Company. Hardware Reference Guide HP Compaq Business PC dx2420 Microtower Model First Edition (January 2009) Document Part Number: 530653-001...

  • Page 3: About This Book

    About This Book This guide provides basic information for upgrading this computer model. WARNING! Text set off in this manner indicates that failure to follow directions 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 information.
  • Page 4 About This Book ENWW...

  • Page 5: Table Of Contents

    Table of contents 1 Product Features Standard Configuration Features ......................1 Front Panel Components ........................2 Media Card Reader Components ......................3 Rear Panel Components ........................4 Keyboard .............................. 5 Using the Windows Logo Key ....................6 Serial Number Location ........................7 2 Hardware Upgrades Warnings and Cautions ........................
  • Page 6 Appendix B Battery Replacement Appendix C External Security Devices Installing a Security Lock ........................45 Cable Lock ......................... 45 Padlock ..........................46 HP Business PC Security Lock ..................46 Appendix D Electrostatic Discharge Preventing Electrostatic Damage ....................... 49 Grounding Methods ..........................49 Appendix E Computer Operating Guidelines, Routine Care and Shipping Preparation Computer Operating Guidelines and Routine Care ................

  • Page 7: Product Features

    Product Features Standard Configuration Features The HP Compaq Microtower features may vary depending on the model. For a complete listing of the hardware and software installed in the computer, run the diagnostic utility (included on some computer models only). Instructions for using the utility are provided in the Troubleshooting Guide.

  • Page 8: Front Panel Components

    Front Panel Components Drive configuration may vary by model. Figure 1-2 Front Panel Components Table 1-1 Front Panel Components 5.25-inch Optical Drives Hard Drive Activity Light Optical Drive Activity Lights Optical Drive Eject Buttons 3.5-inch Media Card Reader (optional) Headphone Connector Microphone Connector USB (Universal Serial Bus) 2.0 Ports Dual-State Power Button...

  • Page 9: Media Card Reader Components

    Media Card Reader Components The media card reader is an optional device available on some models only. Refer to the following illustration and table to identify the media card reader components. Figure 1-3 Media Card Reader Components Table 1-2 Media Card Reader Components Slot Media ●...

  • Page 10: Rear Panel Components

    Rear Panel Components Figure 1-4 Rear Panel Components Table 1-3 Rear Panel Components Power Cord Connector Line-Out Connector for powered audio devices (green) Voltage Select Switch Microphone Connector Line-In Audio Connector (blue) Universal Serial Bus (USB) RJ-45 Network Connector VGA Monitor Connector (blue) PS/2 Mouse Connector (green) PS/2 Keyboard Connector (purple) NOTE:...

  • Page 11: Keyboard

    Keyboard Figure 1-5 Keyboard Components Table 1-4 Keyboard Components Function Keys Perform special functions depending on the software application being used. Editing Keys Includes the following: Insert, Home, Page Up, Delete, End, and Page Down. Status Lights Indicate the status of the computer and keyboard settings (Num Lock, Caps Lock, and Scroll Lock).

  • Page 12: Using The Windows Logo Key

    Using the Windows Logo Key Use the Windows Logo key in combination with other keys to perform certain functions available in the Windows operating system. Refer to the Keyboard on page 5 section to identify the Windows Logo key. Table 1-5 Windows Logo Key Functions The following Windows Logo Key functions are available in Microsoft Windows XP and Microsoft Windows Vista.

  • Page 13: Serial Number Location

    Serial Number Location Each computer has a unique serial number and product ID number that are located on the top cover of the computer. Keep these numbers available for use when contacting customer service for assistance. Figure 1-6 Serial Number and Product ID Location ENWW Serial Number Location...

  • Page 14: Hardware Upgrades

    Hardware Upgrades Warnings and Cautions Before performing upgrades be sure to carefully read all of the applicable instructions, cautions, and warnings in this guide. WARNING! To reduce the risk of personal injury from electrical shock, hot surfaces, or fire: Disconnect the power cord from the wall outlet and allow the internal system components to cool before touching.

  • Page 15: Removing The Computer Access Panel

    Removing the Computer Access Panel Remove/disengage any security devices that prohibit opening the computer. Remove all removable media, such as diskettes or compact discs, from the computer. Turn off the computer properly through the operating system, then turn off any external devices. Disconnect the power cord from the power outlet and disconnect any external devices.

  • Page 16: Replacing The Computer Access Panel

    Replacing the Computer Access Panel Place the access panel on the chassis with about 1.3 cm (1/2 inch) of the panel hanging off the back of the chassis and slide it into place (1). Ensure that the hole for the screw is aligned with the hole in the chassis and tighten the screw (2).

  • Page 17: Removing The Front Bezel

    Removing the Front Bezel Remove/disengage any security devices that prohibit opening the computer. Remove all removable media, such as diskettes or compact discs, from the computer. Turn off the computer properly through the operating system, then turn off any external devices. Disconnect the power cord from the power outlet and disconnect any external devices.

  • Page 18: Removing Bezel Blanks

    Removing Bezel Blanks On some models, there are bezel blanks covering the 3.5-inch and 5.25-inch external drive bays that need to be removed before installing a drive. Remove the front bezel. To remove the lower 5.25-inch bezel blank, gently twist and pull on the bezel blank until it breaks free from the front bezel (1), then discard the bezel blank.

  • Page 19: Replacing The Front Bezel

    Replacing the Front Bezel Insert the three hooks on the left side of the bezel into the slots on the chassis (1) and rotate the bezel on from left to right (2) so that it snaps in place. Figure 2-5 Replacing the Front Bezel ENWW Replacing the Front Bezel...

  • Page 20: Installing Additional Memory

    Installing Additional Memory The computer comes with double data rate 2 synchronous dynamic random access memory (DDR2- SDRAM) dual inline memory modules (DIMMs). DIMMs The memory sockets on the system board can be populated with up to two industry-standard DIMMs. These memory sockets are populated with at least one preinstalled DIMM.

  • Page 21: Populating Dimm Sockets

    Populating DIMM Sockets There are two DIMM sockets on the system board, with one socket per channel. The sockets are labeled DIMM1 and DIMM2. Socket DIMM1 operates in memory channel A. Socket DIMM2 operates in memory channel B. Figure 2-6 DIMM Socket Locations Table 2-1 DIMM Socket Locations...

  • Page 22: Installing Dimms

    Installing DIMMs CAUTION: You must disconnect the power cord and wait approximately 30 seconds for the power to drain before adding or removing memory modules. Regardless of the power-on state, voltage is always supplied to the memory modules as long as the computer is plugged into an active AC outlet. Adding or removing memory modules while voltage is present may cause irreparable damage to the memory modules or system board.
  • Page 23 Open both latches of the memory module socket (1), and insert the memory module into the socket (2). Figure 2-7 Installing a DIMM NOTE: A memory module can be installed in only one way. Match the notch on the module with the tab on the memory socket.

  • Page 24: Removing Or Installing An Expansion Card

    Removing or Installing an Expansion Card The computer has one standard PCI expansion slot that can accommodate an expansion card up to 17.46 cm (6.875 inches) in length. The computer also has two PCI Express x1 expansion slots and one PCI Express x16 expansion slot.
  • Page 25 Remove the computer access panel. Locate the correct vacant expansion socket on the system board and the corresponding expansion slot on the back of the computer chassis. On the rear of the computer, a slot cover lock secures the expansion card brackets in place. Remove the screw from the slot cover lock then slide the slot cover lock up to remove it from the chassis.
  • Page 26 NOTE: Before removing an installed expansion card, disconnect any cables that may be attached to the expansion card. If you are installing an expansion card in a vacant socket, you must use a flatblade screwdriver to pry out the metal shield on the rear panel that covers the expansion slot. Be sure to remove the appropriate shield for the expansion card you are installing.
  • Page 27 If you are removing a PCI Express x16 card, pull the retention arm on the back of the expansion socket away from the card and carefully rock the card back and forth until the connectors pull free from the socket. Be sure not to scrape the card against the other components. Figure 2-12 Removing a PCI Express x16 Expansion Card Store the removed card in anti-static packaging.
  • Page 28 To install a new expansion card, hold the card just above the expansion socket on the system board then move the card toward the rear of the chassis so that the bottom of the bracket on the card slides into the small slot on the chassis. Press the card straight down into the expansion socket on the system board.

  • Page 29: Drive Positions

    Reconnect the power cord and any external devices, then turn on the computer. Lock any security devices that were disengaged when the access panel was removed. Reconfigure the computer, if necessary. Refer to the Computer Setup (F10) Utility Guide for instructions on using Computer Setup.

  • Page 30: Installing Additional Drives

    Installing Additional Drives When installing additional drives, follow these guidelines: ● The primary Serial ATA (SATA) hard drive must be connected to the dark blue primary SATA connector on the system board labeled SATA1. ● Connect the first SATA optical drive to the white SATA connector on the system board labeled SATA2.
  • Page 31 CAUTION: To prevent loss of work and damage to the computer or drive: If you are inserting or removing a drive, shut down the operating system properly, turn off the computer, and unplug the power cord. Do not remove a drive while the computer is on or in standby mode. Before handling a drive, ensure that you are discharged of static electricity.

  • Page 32: System Board Drive Connections

    System Board Drive Connections Refer to the following illustration and table to identify the system board drive connectors. Figure 2-17 System Board Drive Connections Table 2-3 System Board Drive Connections System Board Connector System Board Label Color Media Card Reader JUSB2 white Diskette Drive...

  • Page 33: Removing An Optical Drive

    Removing an Optical Drive CAUTION: All removable media should be taken out of a drive before removing the drive from the computer. To remove an optical drive: Remove/disengage any security devices that prohibit opening the computer. Remove all removable media, such as diskettes or compact discs, from the computer. Turn off the computer properly through the operating system, then turn off any external devices.
  • Page 34 Remove the two screws that secure the drive to the drive cage (1), then slide the drive out of the front of the chassis (2). Figure 2-19 Removing the Optical Drive Chapter 2 Hardware Upgrades ENWW...

  • Page 35: Installing An Optical Drive Into The 5.25-Inch Drive Bay

    Installing an Optical Drive into the 5.25-inch Drive Bay To install an optional 5.25-inch optical drive: Remove/disengage any security devices that prohibit opening the computer. Remove all removable media, such as diskettes or compact discs, from the computer. Turn off the computer properly through the operating system, then turn off any external devices. Disconnect the power cord from the power outlet and disconnect any external devices.

  • Page 36: Removing An External 3.5-Inch Drive

    If the system configuration includes only one optical drive, connect the SATA data cable to the white system board connector labeled SATA2. If you are adding a second optical drive, connect the SATA data cable to the orange system board connector labeled SATA4. Connect the power cable (1) and data cable (2) to the rear of the optical drive.
  • Page 37 Disconnect the drive cables, as indicated in the following illustrations: If you are removing a diskette drive, disconnect the data cable (1) and power cable (2) from the back of the drive. Figure 2-22 Disconnecting the Diskette Drive Cables If you are removing a media card reader, disconnect the USB cable from the system board. Figure 2-23 Disconnecting the Media Card Reader Cable ENWW...

  • Page 38: Installing A Drive Into The 3.5-Inch External Drive Bay

    Remove the two retainer screws that secure the drive to the bay (1) then slide the drive forward and out of the bay (2). Figure 2-24 Removing a 3.5-inch Device (Media Card Reader Shown) Installing a Drive into the 3.5-inch External Drive Bay The 3.5-inch external drive bay on the front of the computer can be configured with a media card reader or a diskette drive.
  • Page 39 Slide the drive in through the front of the chassis (1) until the bezel on the drive is evenly aligned with the computer front bezel and install the two M3 metric retainer screws (2) as shown in the illustration below. NOTE: Extra drive retainer screws are provided on the interior of the front bezel if needed.

  • Page 40: Removing An Internal 3.5-Inch Hard Drive

    Removing an Internal 3.5-inch Hard Drive NOTE: Before you remove the old hard drive, be sure to back up the data from the old hard drive so that you can transfer the data to the new hard drive. Also, if you are replacing the primary hard drive, make sure you have created a Recovery Disc Set to restore the operating system, software drivers, and any software applications that were preinstalled on the computer.
  • Page 41 Push down the latch on the side of the hard disk drive cage (1), then slide the hard disk drive cage away from the bottom of the chassis (2) as shown below. Figure 2-27 Releasing the Hard Drive Cage Lift the hard disk drive cage out of the chassis. Figure 2-28 Removing the Hard Drive Cage ENWW...
  • Page 42 Disconnect the power cable (1) and data cable (2) from the back of the hard drive. Figure 2-29 Disconnecting the Hard Drive Cables Remove the four screws that secure the hard disk drive to the hard disk drive cage (1), then slide the hard disk drive out of the hard disk drive cage (2).

  • Page 43: Installing An Internal 3.5-Inch Hard Drive

    Installing an Internal 3.5-inch Hard Drive Follow the steps in Removing an Internal 3.5-inch Hard Drive on page 34 to remove the hard drive cage and, if necessary, the existing hard drive. Slide the new drive into the hard disk drive cage (1), aligning the drive with the four screw holes on the cage.
  • Page 44 Connect the power cable (1) and data cable (2) to the back of the hard drive. Figure 2-32 Connecting the Hard Drive Cables CAUTION: Never crease or bend a SATA data cable tighter than a 30 mm (1.18 in) radius. A sharp bend can break the internal wires.
  • Page 45 Attach the two screws that secure the hard disk drive cage to the chassis. Figure 2-34 Securing the Hard Drive Cage If installing a new drive, connect the opposite end of the data cable to the appropriate system board connector. NOTE: If your system has only one SATA hard drive, you must connect the hard drive data cable to the dark blue connector labeled SATA1 to avoid any hard drive performance problems.

  • Page 46: Appendix A Specifications

    Specifications Table A-1 Specifications Desktop Dimensions 14.76 in 37.5 cm Height 6.98 in 17.73 cm Width 16.88 in 42.87 cm Depth Approximate Weight 23.5 lb 10.66 kg Temperature Range 50° to 95°F 10° to 35°C Operating -22° to 140°F -30° to 60°C Nonoperating Relative Humidity (noncondensing) 10-90%...
  • Page 47 Table A-1 Specifications (continued) Rated Input Current (maximum) 8A @ 100 VAC 4A @ 200 VAC This system utilizes a passive power factor corrected power supply. The power factor correction is present in the 230V operating mode only. This allows the system to pass the CE mark requirements for use in the countries of the European Union. This supply requires the use of an input voltage range select switch.

  • Page 48: Appendix B Battery Replacement

    Battery Replacement The battery that comes with the computer provides power to the real-time clock. When replacing the battery, use a battery equivalent to the battery originally installed in the computer. The computer comes with a 3-volt lithium coin cell battery. WARNING! The computer contains an internal lithium manganese dioxide battery.
  • Page 49 NOTE: On some computer models, it may be necessary to remove an internal component to gain access to the battery. Depending on the type of battery holder on the system board, complete the following instructions to replace the battery. Type 1 Lift the battery out of its holder.
  • Page 50 Insert the new battery and position the clip back into place. Figure B-3 Removing a Coin Cell Battery (Type 3) NOTE: After the battery has been replaced, use the following steps to complete this procedure. Replace the computer access panel. Plug in the computer and turn on power to the computer.

  • Page 51: Appendix C External Security Devices

    External Security Devices NOTE: For information on data security features, refer to the Computer Setup (F10) Utility Guide and the Desktop Management Guide. Installing a Security Lock The security locks displayed below and on the following pages can be used to secure the computer. Cable Lock Figure C-1 Installing a Cable Lock...

  • Page 52: Padlock

    Padlock Figure C-2 Installing a Padlock HP Business PC Security Lock Fasten the security cable by looping it around a stationary object. Figure C-3 Securing the Cable to a Fixed Object Appendix C External Security Devices ENWW...
  • Page 53 Thread the keyboard and mouse cables through the lock. Figure C-4 Threading the Keyboard and Mouse Cables Screw the lock to the chassis using the screw provided. Figure C-5 Attaching the Lock to the Chassis ENWW Installing a Security Lock...
  • Page 54 Insert the plug end of the security cable into the lock (1) and push the button in (2) to engage the lock. Use the key provided to disengage the lock. Figure C-6 Engaging the Lock Appendix C External Security Devices ENWW...

  • Page 55: Appendix D Electrostatic Discharge

    Electrostatic Discharge A discharge of static electricity from a finger or other conductor may damage system boards or other static-sensitive devices. This type of damage may reduce the life expectancy of the device. Preventing Electrostatic Damage To prevent electrostatic damage, observe the following precautions: ●...

  • Page 56: Appendix E Computer Operating Guidelines, Routine Care And Shipping Preparation

    Computer Operating Guidelines, Routine Care and Shipping Preparation Computer Operating Guidelines and Routine Care Follow these guidelines to properly set up and care for the computer and monitor: ● Keep the computer away from excessive moisture, direct sunlight, and extremes of heat and cold. ●...

  • Page 57: Optical Drive Precautions

    Optical Drive Precautions Be sure to observe the following guidelines while operating or cleaning the optical drive. Operation ● Do not move the drive during operation. This may cause it to malfunction during reading. ● Avoid exposing the drive to sudden changes in temperature, as condensation may form inside the unit.

  • Page 58: Index

    Index removing blanks 12 installing 32 access panel replacing 13 removing 30 locking and unlocking 45 front panel components 2 memory removing 9 installing 14 replacing 10 populating sockets 15 hard drive audio connectors 2, 4 specifications 14 installing 37 microphone connector 2, 4 removing 34 monitor, connecting 4...
  • Page 59 PCI card 20 PCI Express card 21 security cable lock 45 HP Business PC Security Lock 46 padlock 46 serial number location 7 shipping preparation 51 specifications computer 40 memory 14 system board drive connections 26 unlocking access panel 45 USB ports front panel 2 rear panel 4...

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