HP Compaq dx2250 Reference Guide

Hardware Reference Guide - dx2250 Microtower Model

HP Compaq Business PC

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Hardware Reference Guide

HP Compaq Business PC

dx2250 Microtower Model

First Edition (November 2006)

Document Part Number: 437301-001

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.

NOTE Text set off in this manner provides important supplemental information.

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iv About This Book ENWW

Table of contents

1 Product Features

Standard Configuration Features ......................................................................................................... 1

Serviceability Features ......................................................................................................................... 1

Warnings and Cautions ........................................................................................................................ 2

2 Hardware Upgrades

Removing the Computer Access Panel and Front Bezel ..................................................................... 3

Removing a 5.25" Drive Bezel Blank ................................................................................................... 5

Removing a 3.5" Drive Bezel Blank ..................................................................................................... 6

Installing Additional Memory ................................................................................................................ 7

DIMMs ................................................................................................................................. 7

DDR2-SDRAM DIMMs ........................................................................................................ 7

Installing DIMMs .................................................................................................................. 8

Installing an Expansion Card .............................................................................................................. 10

Replacing or Upgrading a Drive ......................................................................................................... 12

Locating Drive Positions .................................................................................................... 12

Removing a 5.25" Optical Drive ......................................................................................... 13

Removing a 3.5" Media Card Reader or Diskette Drive .................................................... 14

Removing a 3.5" Hard Drive .............................................................................................. 15

Installing a Security Lock .................................................................................................................... 16

3 Battery Replacement

4 Computer Operating Guidelines, Routine Care and Shipping Preparation

Computer Operating Guidelines and Routine Care ............................................................................ 21

Optical Drive Precautions ................................................................................................................... 22

Operation ........................................................................................................................... 22

Cleaning ............................................................................................................................. 22

Safety ................................................................................................................................. 22

Shipping Preparation .......................................................................................................................... 22

5 Electrostatic Discharge

Preventing Electrostatic Damage ....................................................................................................... 23

Grounding Methods ............................................................................................................................ 23

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1 Product Features

Standard Configuration Features

Figure 1-1 HP Compaq dx2250 Microtower

NOTE The drive configuration shown above may be different than your computer model.

Serviceability Features

The Microtower computer includes features that make it easy to upgrade and service. A Torx T-15 screwdriver is needed for many of the installation procedures described in this chapter.

ENWW Standard Configuration Features 1

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, rotating fans, hot

surfaces, and/or fire:

Disconnect the power cord from the wall outlet and allow the internal system components to cool before touching.

Do not plug telecommunications or telephone connectors into the network interface controller (NIC) receptacles.

Do not disable the power cord grounding plug. The grounding plug is an important safety feature.

Plug the power cord in a grounded (earthed) outlet that is easily accessible at all times.

To reduce the risk of serious injury, read the Safety & Comfort Guide. It describes proper workstation, setup, posture, and health and work habits for computer users, and provides important electrical and mechanical safety information. This guide is located on the Web at

http://www.hp.com/ergo and on the Documentation and Diagnostics CD.

CAUTION Static electricity can damage the electrical 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.

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 damage to internal components.

2 Chapter 1 Product Features ENWW

2 Hardware Upgrades

Removing the Computer Access Panel and Front Bezel

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 (1), and disconnect any external

devices.

CAUTION Regardless of the power-on state, voltage is always present on the system

board as long as the system is plugged into an active AC outlet. You must disconnect the power cord to avoid damage to the internal components of the computer.

3. Remove the two screws that secure the access panel to the computer chassis (2).

4. Slide the access panel back about 1.3 cm (1/2 inch), then lift it away from and off the unit (3).

Figure 2-1 Removing the Power Cord and Access Panel

NOTE To replace the access panel, reverse the removal steps.

ENWW Removing the Computer Access Panel and Front Bezel 3

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