HP dx2480 - Microtower PC Operating and maintenance manual

Hardware Reference Manual
HP Compaq Business Desktop dx2480
Microtower Model
March 2008
This guide provides basic information for upgrading this computer
model.
Document Number : 468080-D61

Hardware Reference Guide
HP Compaq Business Desktop dx2480
Microtower Model
March 2008
This guide provides basic information for upgrading this computer
model.

© Copyright 2008 Hewlett-Packard Development Company, L.P. The information
contained herein is subject to change without notice.
Microsoft, MS-DOS, Windows and Windows Vista 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.
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.
Hardware Reference Guide
HP Compaq Business Desktop dx2480 Microtower Model
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Contents
1 Product Features
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 Access Panel ................................................................ 2-2
Removing the Front Bezel.................................................................................... 2-3
Installing Additional Memory............................................................................... 2-4
DIMMs ................................................................................................................. 2-4
DDR2-SDRAM DIMMs ...................................................................................... 2-4
Populating DIMM Sockets ................................................................................... 2-5
Installing DIMMs ................................................................................................. 2-6
Removing a 5.25" Drive Bezel Blank .................................................................. 2-8
Replacing or Upgrading a Drive .......................................................................... 2-9
Locating Drive Positions .................................................................................... 2-10
Removing a Drive .............................................................................................. 2-11
Replacing a Drive ............................................................................................... 2-13
Install Second Hard Disk ................................................................................... 2-16
Removing or Installing an Expansion Card ....................................................... 2-19
Reassembling the Computer .............................................................................. 2-25
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Contents
3 Battery Replacement ................................................................................... 3-1
4 Security Lock Provisions
Installing a Security Lock ................................................................................... 4-1
Mechanical Lock ....................................................................................................... 4-1
Chasis intrusion Lock ................................................................................................ 4-1
5 Electrostatic Discharge
Preventing Electrostatic Damage ......................................................................... 5-1
Grounding Methods.............................................................................................. 5-1
6 Computer Operating Guidelines, Routine Care and Shipping
Preparation
Computer Operating Guidelines and Routine Care .............................................. 6-1
Optical Drive Precautions .................................................................................... 6-2
Operation ............................................................................................................. 6-2
Cleaning ............................................................................................................... 6-2
Safety ................................................................................................................... 6-2
Shipping Preparation ............................................................................................ 6-3
7 Computer Setup (F10) Utility
Computer Setup (F10) Utility ................................ ............................................ 7-1
Using Computer Setup (F10) Utilities ................................................................. 7-2
Recovering the Configuration Settings.......................... .......................................... 7-4
8 Troubleshooting Guide
Computer Diagnostic Features ................................ ............................................ 8- 1
Troubleshooting ........................................................ .............................................. 8- 8

Product Features
1
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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 Diagnostics for
Windows utility. Instructions for using this utility are
provided in the Troubleshooting Guide on the
Documentation and Diagnostics CD.
Microtower Configuration
Photos depicted may vary as per actual machine

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Product Features
Front Panel Components
Drive configuration may vary by model.
Photos depicted may vary as per actual machine
Front Panel Components
Power Button
Hard Drive Activity Light
7
8
9
10
11
12
Optical Drive Eject Button
Headphone Jack
Microphone Connector
USB (Universal Serial Bus) Ports
Optical Drives
Optical Drive Activity Lights
Diskette Drive (optional)
Diskette Drive Activity Light (optional)
Diskette Drive Eject Button (optional)
1
2
3
4
5
6Power On Light
1
28
9
10
3
4
5
6
7
11
12

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Product Features
Rear Panel Components
Rear Panel Components
Power Cord Connector RJ-45 Network Connector .
Voltage Select Switch Parallel Port Connector
PS/2 Mouse Connector Monitor Connector
PS/2 Keyboard Connector Headphone/Line-Out Connector
Universal Serial Bus (USB) Audio/Line-In Connector
Serial Port Connector Microphone Connector
1 7
2 8
3 9
4 10
5
11
612
Arrangement and number of connectors may vary by model.
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Photos depicted may vary as per actual machine
944
11
12 3 5 6 7 8 10 12

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).
Numeric Keys Work like a calculator keypad.
Arrow 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.
Ctrl Keys Used in combination with another key; its effect depends
on the application software you are using.
Application 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.
Windows Logo Keys* Used to open the Start menu in Microsoft Windows. Used
in combination with other keys to perform other functions.
Alt Keys Used in combination with another key; its effect depends
on the application software you are using. *Keys available
in select geographic regions.
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Product Features
Keyboard
1
2
3
4
5
6
7
8
9
Photos depicted may vary as per actual machine

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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.
Windows Logo Key Functions
Windows Logo Key Displays or hides the Start menu.
Windows Logo Key + d Displays the Desktop.
Windows Logo Key + m Minimizes all open applications.
Shift + Windows Logo Key + m Undoes Minimize All.
Windows Logo Key + e Launches My Computer.
Windows Logo Key + f Launches Find Document.
Windows Logo Key + Ctrl + f Launches Find Computer.
Windows Logo Key + F1 Launches Windows Help.
Windows Logo Key + l Locks 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 + r Launches the Run dialog box.
Windows Logo Key + u Launches the Utility Manager.
Windows Logo Key + Tab Activates the next Taskbar button.
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.

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Product Features
Serial Number Location
Each computer has a unique serial number and a 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.
Serial Number and Product ID Location
Photos depicted may vary as per actual machine

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Hardware Upgrades
2
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.
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
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.
WARNING: 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.
WARNING: To reduce the risk of electrical shock, before removing the
computer cover ensure that telecommunication/telephone connector (TNV
circuit) are disconnected
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. See Chapter 5, "Electrostatic Discharge" for more
information.
CAUTION: Before removing the computer cover, ensure that the computer
is turned off and that the power cord is disconnected from the electrical
outlet.
CAUTION: To reduce the risk of fire, use only No. 26 AWG or larger (e.g.,
24 AWG) UL Listed or CSA Certified Telecommunication Line Cord
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Hardware Upgrades
Removing the Computer Access Panel
CAUTION: 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.
To remove the computer access panel:
1. Turn off the computer properly through the operating system and
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 screw that secures the access panel to the
computer chassis.
4. Slide the access panel back about 2.5 cm (1 inch), then lift it
off the unit.
1
2
To replace the access panel, reverse the removal steps.
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Removing the Computer Access Panel
Photos depicted may vary as per actual machine

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Hardware Upgrades
Removing the Front Bezel
To remove the front bezel:
1. Turn off the computer properly through the operating system and turn
off any external devices.
2. Disconnect the power cord from the power outlet and the computer, and
disconnect any external devices.
3. To remove the front bezel, press down on all four tabs
at the bottom of the bezel and then rotate the bezel off the chassis .
1
Removing the Front Bezel
Photos depicted may vary as per actual machine
2
1

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Hardware Upgrades
Installing Additional Memory
The computer comes with double data rate 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 8GB*
of memory configured in a high-performing dual channel mode.
DDR2-SDRAM DIMMs
For proper system operation, if the computer supports DDR2
SDRAM DIMMs, the DIMMs must be:
Industry-standard 240-pin
Unbuffered 800 MHz-compliant
DDR2 800 MHz DIMM
*8GB Memory is supported only with Windows Vista 64 bit or
Freedos operating systems
256Mbit, 512Mbit, and 1Gbit non-ECC memory technologies
single-sided and double-sided DIMMS
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, 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.
There are Four DIMM sockets on the system board, with two sockets
per channel.
DIMM Socket
Item Description Socket Color
1
3
DIMM socket, Channel A
DIMM socket, Channel B
Yellow
Yellow
2
4
DIMM socket, Channel A
DIMM socket, Channel B
Red
Red
1
2
3
4

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Hardware Upgrades
Installing DIMMs
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.
CAUTION: 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. For more informations, refer to Chapter 5, "Electrostatic
Discharge."
CAUTION: 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 and
turn off any external devices.
2. Disconnect the power cord from the power outlet and disconnect
any external devices.
3. Remove the computer access panel.
4. Locate the memory module sockets on the system board.
WARNING: To reduce risk of personal injury from hot surfaces, allow the
internal system components to cool before touching.
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A memory module can be installed in only one way. Match the notch
on the module with the tab on the memory socket.
6. 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 .
7. Repeat steps 5 and 6 to install any additional modules.
8. Replace the access panel.
The computer should automatically recognize the additional memory
the next time you turn on the computer.
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Hardware Upgrades
5. Open both latches of the memory module socket , and insert the
memory module into the socket
1
3
2
Installing a DIMM
Photos depicted may vary as per actual machine

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Hardware Upgrades
Removing a 5.25" Drive Bezel Blank
If the computer was not shipped with a drive in the 5.25" option bay,
the bay will be covered by a bezel blank. If you add a drive to the
option bay, you must first remove the bezel blank.
1. Turn off the computer properly through the operating system and
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 access panel and front bezel. Refer to "Removing the
Computer Access Panel" and "Removing the Front Bezel".
4. While facing the inside of the front bezel, press the two retaining
tabs on the right towards the outer edge of the bezel and pull
the bezel blank inwards to remove it .
Removing a Bezel Blank
To install a bezel blank, slide the left side of the blank into the two
retainer slots on the left side of the front bezel then snap the right side
of the blank into place.
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Photos depicted may vary as per actual machine

Hardware Reference Guide www.hp.com/in 2-9
Hardware Upgrades
Replacing or Upgrading a Drive
The computer supports up to six drives that may be installed in
various configurations.
This section describes the procedure for replacing or upgrading
the storage drives. A Torx screwdriver is needed to remove and
install the guide screws and retainer screws on a drive.
CAUTION: Make sure you back up your personal files on the hard drive to an
external storage device, such as a CD, 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! DVD to load the HP factory-installed files.