HP Compaq dx2100 ST Operating and maintenance manual

Hardware Reference Guide
HP Compaq Business PC
dx2100 Slim Tower Model
Document Part Number: 376294-001
July 2005
This guide provides basic information for upgrading this computer
model.

© Copyright 2005 Hewlett-Packard Development Company, L.P.
The information contained herein is subject to change without notice.
Microsoft and Windows are trademarks of Microsoft Corporation in the U.S.
and other countries.
The only warranties for HP products and services are set forth in the express
warranty statements accompanying such products and services. Nothing herein
should be construed as constituting an additional warranty. HP shall not be liable
for technical or editorial errors or omissions contained herein.
This document contains proprietary information that is protected by copyright.
No part of this document may be photocopied, reproduced, or translated to
another language without the prior written consent of Hewlett-Packard
Company.
ÅWARNING: Text set off in this manner indicates that failure to follow
directions could result in bodily harm or loss of life.
ÄCAUTION: Text set off in this manner indicates that failure to follow
directions could result in damage to equipment or loss of information.
Hardware Reference Guide
HP Compaq Business PC
dx2100 Slim Tower Model
First Edition (July 2005)
Document Part Number: 376294-001

Hardware Reference Guide www.hp.com iii
Contents
1ProductFeatures
Standard Configuration Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
Front Panel Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
Rear Panel Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3
Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4
Windows Logo Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–5
Special Mouse Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–5
Serial Number Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6
2 Hardware Upgrades
Serviceability Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
Removing the Computer from the Stand. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
Removing the Computer Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
Replacing the Computer Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
Installing Additional Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
DIMMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
DDR2-SDRAM DIMMs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
Populating DIMM Sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–6
Installing DIMMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–8
Installing an Expansion Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–10
Installing Additional Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–14
Locating Drive Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–15
Removing an Optical Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–16
Removing a Diskette Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–20
Installing an Optional Optical Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–23
Upgrading the SATA Hard Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–28
Installing an Optional Drive into the 3.5-inch Drive Bay. . . . . . . . . . . . . . . . . . . 2–34

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Contents
A Specifications
B Battery Replacement
C Security Lock Provisions
Installing a Security Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C–1
Cable Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C–1
Padlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C–3
HP Business PC Security Lock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C–4
DElectrostaticDischarge
Preventing Electrostatic Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D–1
Grounding Methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D–1
E Computer Operating Guidelines, Routine Care and
Shipping Preparation
Computer Operating Guidelines and Routine Care. . . . . . . . . . . . . . . . . . . . . . . . . . . . E–1
Optical Drive Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E–2
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E–2
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E–2
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E–2
Shipping Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E–3
Index

Hardware Reference Guide www.hp.com 1-1
1
Product Features
Standard Configuration Features
The HP Compaq Slim Tower features may vary depending on the
model. For a complete listing of the hardware and software installed
in the computer, run the diagnostics utility (included on some
computer models only). Instructions for using the utility are provided
in the Troubleshooting Guide on the Documentation CD.
Slim Tower Configuration

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Product Features
Front Panel Components
Drive configuration may vary by model.
Front Panel Components
1Microphone Connector 7Diskette Drive Activity Light
2Headphone Connector 8Diskette Drive
3USB (Universal Serial Bus) Ports (2) 9Optical Drive Activity Light
4Hard Drive Activity Light -Diskette Eject Button
5Power On Light qOptical Drive (CD-ROM, CD-R/RW,
DVD-ROM, DVD+R/RW, or
CD-RW/DVD Combo Drive)
6Dual-State Power Button <Optical Drive Eject Button

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Product Features
Rear Panel Components
Rear Panel Components
1Power Cord Connector 6nRJ-45 Network Connector
2bPS/2 Mouse Connector (green) 7lParallel Connector
3aPS/2 Keyboard Connector (purple) 8cMonitor Connector
4oUniversal Serial Bus (USB) 9kLine-Out Connector for powered
audio devices (green)
5mSerial Connector* -jLine-In Audio Connector (blue)
✎Arrangement and number of connectors may vary by model.
If an ADD2 graphics card is installed, the connectors on the card and the system board may
be used at the same time. Some settings may need to be changed in Computer Setup to use
both connectors. For information about Boot Order, refer to the Computer Setup (F10) Utility
Guide on the Documentation CD.
*An optional second serial connector is available from HP.

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Product Features
Keyboard
Keyboard Components
1Function Keys Perform special functions depending on the software application
being used.
2Editing Keys Includes the following: Insert, Home, Page Up, Delete, End, and
Page Down.
3Status Lights Indicate the status of the computer and keyboard settings
(Num Lock, Caps Lock, and Scroll Lock).
4Numeric Keys Work like a calculator keypad.
5Arrow Keys Used to navigate through a document or Web site. These keys
allow you to move left, right, up, and down, using the keyboard
instead of the mouse.
6Ctrl Keys Used in combination with another key; its effect depends on the
application software you are using.
7Application Key* Used (like the right mouse button) to open pop-up menus in a
Microsoft Office application. May perform other functions in other
software applications.
8Windows Logo
Keys*
Used to open the Start menu in Microsoft Windows. Used in
combination with other keys to perform other functions.
9Alt Keys Used in combination with another key; its effect depends on the
application software you are using.
*Keys available in select geographic regions.

Hardware Reference Guide www.hp.com 1-5
Product Features
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” section to identify the Windows Logo key.
Special Mouse Functions
Most software applications support the use of a mouse. The functions
assigned to each mouse button depend on the software applications
you are using.
Windows Logo Key Functions
Windows Logo Key Displays or hides the Start menu.
Windows Logo Key + dDisplays the Desktop.
Windows Logo Key + mMinimizes all open applications.
Shift + Windows Logo Key + m Undoes Minimize All.
Windows Logo Key + eLaunches My Computer.
Windows Logo Key + fLaunches Find Document.
Windows Logo Key + Ctrl + f Launches Find Computer.
Windows Logo Key + F1 Launches Windows Help.
Windows Logo Key + lLocks the computer if you are connected to a
network domain, or allows you to switch users if you
are not connected to a network domain.
Windows Logo Key + rLaunches the Run dialog box.
Windows Logo Key + uLaunches the Utility Manager.
Windows Logo Key + Tab Activates the next Taskbar button.

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Product Features
Serial Number Location
Each computer has a unique serial number 1located on the top of the
computer and a product ID number 2located on the side panel of the
computer. Keep these numbers available for use when contacting
customer service for assistance.
Serial Number and Product ID Locations

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2
Hardware Upgrades
Serviceability Features
This computer includes features that make it easy to upgrade and
service. No tools are needed for most of the installation procedures
described in this chapter.
Warnings and Cautions
Before performing upgrades be sure to carefully read all of the
applicable instructions, cautions, and warnings in this guide.
ÅWARNING: To reduce the risk of personal injury from electrical shock
and/or hot surfaces, be sure to disconnect the power cord from the wall
outlet, and allow the internal system components to cool before touching.
ÅWARNING: To reduce the risk of electrical shock, fire, or damage to the
equipment, do not plug telecommunications/telephone connectors into
the network interface controller (NIC) receptacles.
ÄCAUTION: Static electricity can damage the electronic components of
the computer or optional equipment. Before beginning these procedures,
ensure that you are discharged of static electricity by briefly touching a
grounded metal object. Refer to Appendix D, “Electrostatic Discharge” in
this guide for additional information on preventing electrostatic discharge.
ÄCAUTION: When the computer is plugged into an AC power source,
voltage is always applied to the system board. You must disconnect the
power cord from the power source before opening the computer to
prevent system board damage.

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Hardware Upgrades
Removing the Computer from the Stand
When accessing internal components, remove the computer from the
stand before removing the computer cover. To remove the computer
from the stand:
1. Turn off the computer properly through the operating system,
then turn off any external devices.
2. Disconnect the power cord from the power outlet and the
computer, and disconnect any external devices.
3. Lift the computer off the stand.
Removing the Computer from the Computer Stand
✎Lay the computer on its side (with the computer cover facing up)
before removing the computer cover and installing hardware.

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Hardware Upgrades
Removing the Computer Cover
To remove the computer cover:
1. Turn off the computer properly through the operating system,
then turn off any external devices.
2. Disconnect the power cord from the power outlet and the
computer, and disconnect any external devices.
3. Remove the computer from the stand and lay the computer on its
side.
ÄCAUTION: Before removing the computer cover, ensure that the
computer is turned off and that the power cord is disconnected from
the electrical outlet.
4. Press the buttons on the left and right sides of the computer 1
then slide the computer cover forward until it stops 2and lift it
up and off the chassis.
Removing the Computer Cover

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Hardware Upgrades
Replacing the Computer Cover
To replace the computer cover, align the tabs on the panel with the
slots on the chassis, then slide the cover all the way onto the chassis
until it locks into place.
Replacing the Computer Cover

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Hardware Upgrades
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
four industry-standard DIMMs. These memory sockets are populated
with at least one preinstalled DIMM. To achieve the maximum
memory support, you can populate the system board with up to 4GB
of memory configured in a high-performing dual channel mode.
DDR2-SDRAM DIMMs
For proper system operation, the DDR2-SDRAM DIMMs must be:
■industry-standard 240-pin
■unbuffered PC3200 400 MHz-compliant or PC4300
533 MHz-compliant
■1.8 volt DDR2-SDRAM DIMMs
The DDR2-SDRAM DIMMs must also:
■support CAS latency 3, 4, or 5 (CL = 3, CL = 4, or CL = 5) for
DDR2/400 MHz; supports CAS latency 4 or 5 (CL = 4 or CL = 5)
for DDR2/533 MHz
■contain the mandatory JEDEC SPD information
In addition, the computer supports:
■256Mbit, 512Mbit, and 1Gbit non-ECC memory technologies
■single-sided and double-sided DIMMS
■DIMMs constructed with x8 and x16 DDR devices; DIMMs
constructed with x4 SDRAM are not supported
✎The system will not start if you install unsupported DIMMs.

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Hardware Upgrades
Populating DIMM Sockets
The system will automatically operate in single channel mode, dual
channel Asymmetric mode, or a higher-performing dual channel
Interleaved mode, depending on how the DIMMs are installed.
■The system will operate in single channel mode if the DIMM
sockets are populated in one channel only.
■The system will operate in dual channel Asymmetric mode if the
total memory capacity of the DIMMs in Channel A is not equal to
the total memory capacity of the DIMMs in Channel B.
■The system will operate in a higher-performing dual channel
Interleaved mode if the total memory capacity of the DIMMs in
Channel A is equal to the total memory capacity of the DIMMs in
Channel B. However, the technology and device width can vary
between the channels. For example, if Channel A is populated
with two 256MB DIMMS and Channel B is populated with one
512MB DIMM, the system will operate in Interleaved mode.
■In any mode, the maximum operational speed is determined by
the slowest DIMM in the system. For example, if the system is
populated with a DIMM that is 400 MHz and a second DIMM
that is 533 MHz, the system will run at the slower of the two
speeds.

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Hardware Upgrades
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.
DIMM Socket Locations
Item Description Socket Color
1DIMM socket XMM1, Channel A Black
2DIMM socket XMM2, Channel A White
3DIMM socket XMM3, Channel B Black
4DIMM socket XMM4, Channel B White

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Hardware Upgrades
Installing DIMMs
ÄCAUTION: 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.
ÄCAUTION: Static electricity can damage the electronic components of
the computer or optional cards. Before beginning these procedures,
ensure that you are discharged of static electricity by briefly touching a
grounded metal object. Refer to Appendix D, “Electrostatic Discharge” for
more information.
ÄCAUTION: When handling a memory module, be careful not to touch
any of the contacts. Doing so may damage the module.
1. Turn off the computer properly through the operating system,
then turn off any external devices.
2. Disconnect the power cord from the power outlet and disconnect
any external devices.
3. Remove the computer from the stand and lay the computer on its
side.
4. Remove the computer cover. Refer to “Removing the Computer
Cover.”
5. Locate the memory module sockets on the system board.
ÅWARNING: To reduce risk of personal injury from hot surfaces, allow
the internal system components to cool before touching.

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Hardware Upgrades
6. Open both latches of the memory module socket 1, then insert
the memory module into the socket 2.
Installing a DIMM
✎A memory module can be installed in only one way. Match the notch
on the module with the tab on the memory socket.
✎For maximum performance, populate the sockets so that the memory
capacity of Channel A is equal to the memory capacity of Channel B.
For example, if you have one preinstalled DIMM in socket XMM1
and are adding a second DIMM, it is recommended that you install a
DIMM of equal memory capacity into the XMM3 or XMM4 socket.
7. 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.
8. Repeat steps 6 and 7 for any additional modules that you want to
install.
9. Replace the computer cover and place the computer on its stand.
10. Plug in the power cord and turn on the computer.The computer
automatically recognizes the additional memory the first time you
power on the computer.

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Hardware Upgrades
Installing an Expansion Card
The computer has two standard PCI expansion slots that can
accommodate an expansion card up to 6.875 inches (17.46 cm)
in length. The computer also has one PCI Express x1 expansion slot.
✎The PCI and PCI Express slots support only low profile expansion
cards.
Expansion Slot Locations
Item Description
1PCI expansion slots
2PCI Express x1 expansion slot