HP Pavilion xt800 - Desktop PC User manual

hp pavilion home pc
upgrading and servicing
the pc

The information in this document is subject to change without
notice.
Hewlett-Packard® Company makes no warranty of any kind
with regard to this material, including, but not limited to, the
implied warranties of merchantability and fitness for a
particular purpose.
HP shall not be liable for errors contained herein or for
incidental or consequential damages in connection with the
furnishing, performance, or use of this material.
HP assumes no responsibility for the use or reliability of its
software on equipment that is not furnished by HP.
This document contains proprietary information that is
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document may be photocopied, reproduced, or translated to
another language without the prior written consent ofHP.
Hewlett-Packard Company
Home Products Division
P.O. Box 4010
Cupertino, CA 95015-4010
USA
©Hewlett-Packard Company, 2000. All rights reserved.
Hewlett-Packard is a registered trademark of Hewlett-Packard
Company in the United States of America and other
countries.
Other brand or product names are trademarks of their
respective holders.
Warning: The HP Pavilion PC may come with
software that allows you to copy audio files in
the MP3 format. Unauthorized reproduction
and distribution of audio MP3 files, or any
portion of them, can result in civil and criminal
penalties.

Features of the HP Pavilion
On the top of the chassis is a CD holder (A).
Store the CDs that came with the HP Pavilion
inside this compartment, so you can quickly
locate them if you ever need to reinstall any
ofthe system applications.
To connect components to the front of the
PC, flip up the port cover (B) and plug the
cables into the corresponding connectors.
For more information about these ports, see
“Connecting External Components” in the
User’s Guide.
Note: The power supply is pre-set for the country in
which you purchased the HP Pavilion. If you move
to another location, please make sure you check
the voltage requirements in the country you reside
before turning on the PC.

Opening the Computer
Warning: The HP Pavilion is heavy; be sure
to use ergonomically correct lifting
procedures when moving the computer.
Avertissement : L’ordinateur HP Pavilion
est lourd ; suivez des procédures
ergonomiques lorsque vous le déplacez.
Warning: Electrostatic discharge (ESD) can
damage disk drives, add-in cards, and other
components. If an ESD station is not available,
wear a wrist strap attached to a metal part of
the computer. Place cards on a conductive
foam pad or inside the conductive wrapper
they came in; do not place the cards on top
of the wrapper.
Avertissement : Des décharges
électrostatiques peuvent endommager les
unités de disque, cartes d'extension et autres
composants. Si vous ne disposez pas d'une
station de protection contre les décharges
électrostatiques, portez un bracelet
antistatique relié à une partie métallique de
l'ordinateur. Placez les cartes sur un tapis en
mousse conducteur ou dans leur emballage,
mais ne les posez jamais sur leur emballage.
Warning: Do not operate the system with
the cover removed. Always replace the
cover before turning on the system.
Avertissement : N’utilisez pas le système
lorsque son capot est ouvert. Remettez
toujours le capot en place avant de mettre le
système sous tension.
Before You Begin
Read the following items before attempting
to upgrade or service the computer:
nThese procedures assume familiarity with
the general terminology associated with
personal computers and with the safety

practices and regulatory compliance
required for using and modifying
electronic equipment.
nSet up an equipment log to record the
system model and serial numbers, all
installed options, and other information
about the system. If you need this
information, it will be easier to consult the
log than to open up and examine the
system.
nHP recommends that you use an antistatic
wrist strap and a conductive foam pad
when working on the system.
nDisconnect the system from any
telecommunications links, networks,
or modems, and then disconnect the
system power source before performing
any of the procedures described in this
guide. Failure to do so before you open the
system or do any procedures can result in
personal injury or equipment damage.
Note: Disconnect the modem/phone cable before
disconnecting the power cord from the system.
To gain access to the inside of the computer,
remove the side panel.
Removing the Side Panel
You must remove the side panel to add
memory, insert add-in cards, install or
remove drives, or change the battery.
1Turn off the computer and all peripherals.
2Disconnect the modem/phone cable.
3Disconnect the power cord and all other
attached cables (such as the keyboard,
mouse, and monitor).

4Loosen the two thumb screws on the right
side of the back panel. The first time you
loosen these screws you’ll need a flathead
screwdriver. (These screws do not detach;
they’ll stay on the side panel loosely until
you tighten them again.)
5Stand behind the computer, and place one
hand on top of the chassis.
6Grasp the handle (A) with your other hand
and pull the panel towards you until it
stops.
7Lift the panel up and out. Set the panel
aside.

Removing the Fan Duct
To access some components on the
motherboard, you may need to remove the
fan duct.
Note:Make sure the computer is turned off and the
modem/phone cable and power cord are
disconnected from the computer.
1Remove the side panel (see “Removing the
Side Panel” on page 3).
2Gently lay the computer on its side.
3To disengage the fan duct (B), push down
on the two tabs (C). You can push with
your fingers or a pen.
4Rotate the fan duct down and out to
remove it from the chassis.
Removing the Drive Cage
The HP Pavilion has two drive cages. The top
cage that holds the CD drive(s) is stationary.
The bottom cage holds the diskette and hard
drive and is removable. You may need to
remove this bottom drive cage to access

internal components or to add or replace a
hard drive.
Note: Make sure the computer is turned off and the
modem/phone cable and power cord are
disconnected from the computer.
1Remove the side panel (see “Removing the
Side Panel” on page 3).
2Gently lay the computer on its side.
3Remove the fan duct (see “Removing the
Fan Duct” on page 5).
4Remove the power and IDE cables from the
back of the diskette and hard drives. Make
note of each connection before
disconnecting the cables.
5Push down on the drive cage release tab
(D).

6Hold the release tab down as you rotate
the cage up and lift it out.
Adding Memory
The motherboard contains 168-pin DIMM
(dual-inline memory module) sockets; the
exact number of sockets depends on which
model you have. You can install these types
of DIMMs in the system:
n64 MB SDRAM
n128 MB SDRAM
n256 MB SDRAM
All installed memory modules must be 168-
pin unbuffered SDRAM (synchronous
dynamic random access memory) DIMMs
and compliant with the Intel®PC SDRAM
Unbuffered DIMM Specification.
The HP Pavilion ships with one or more
DIMMs, but you can replace the existing
DIMM(s) with higher capacity ones.
Installing a DIMM
To install a DIMM:
1Turn off the computer and all peripherals.
2Disconnect the modem/phone cable.
3Disconnect the power cord and all other
attached cables (such as the keyboard,
mouse, and monitor).
4Remove the side panel (see “Removing the
Side Panel” on page 3).
5Gently lay the computer on its side.

6Locate the DIMM sockets on the
motherboard.
Note: If all of the DIMM sockets are filled, you need to
remove one of the DIMMs (see “Removing a
DIMM” on page 9).
7If necessary to reach the DIMM socket,
remove the fan duct (see “Removing the
Fan Duct” on page 5).
8If necessary to reach the DIMM socket,
remove the drive cage (see “Removing the
Drive Cage” on page 5).
9Move any cabling out of the way,
ifnecessary.
10 Push down on the two retaining clips on
the ends of the DIMM socket.
11 Holding the new DIMM by its edges only,
remove it from the antistatic packaging.
(Avoid touching the memory chips or the
gold contacts on the DIMM.) The DIMM
has two small notches on the lower edge
that fit into raised bumps in the DIMM
socket.
12 Hold the DIMM in alignment with the
socket, aligning the notches with the
bumps.
13 Push straight down on top of the DIMM
until it is fully seated in the socket. The
retaining clips on the ends of the socket

automatically lock it into position when the
DIMM is fully seated.
To reassemble the computer:
1If you moved any cabling, put them back
into place.
2Replace the drive cage, fan duct, and side
panel (see “Closing the Computer” on
page 20).
3Reconnect the power cord and all other
cables.
4Reconnect the modem/phone cable.
5Turn on the computer and all peripherals.
Removing a DIMM
1Turn off the computer and all peripherals.
2Disconnect the modem/phone cable.
3Disconnect the power cord and all other
attached cables (such as the keyboard,
mouse, and monitor).
4Remove the side panel (see “Removing the
Side Panel” on page 3).
5Gently lay the computer on its side.
6Locate the DIMM sockets on the
motherboard.
7If necessary to reach the DIMM socket,
remove the fan duct (see “Removing the
Fan Duct” on page 5).
8If necessary to reach the DIMM socket,
remove the drive cage (see “Removing the
Drive Cage” on page 5).
9Move any cabling out of the way,
ifnecessary.
10 Push down on the two retaining clips on
the ends of the DIMM socket until the
DIMM pops out of the socket.

Warning: Do not pull the DIMM out of the
socket. Use the retaining clips to eject the
DIMM.
11 Holding the DIMM by its edges only, lift it
away from the socket. Store it in its
antistatic packaging.
To install a new DIMM in this socket, see
“Installing a DIMM.”
Installing Add-In Cards
At some point, you may want to add a card
to the computer to accommodate a new
component, such as a scanner, or to upgrade
an existing card.
Warning: Do not overload the system by
installing add-in cards that draw excessive
current. The system is designed to provide 2
amps (average) of +5 V power for each
board/card in the computer. The total +5 V
current draw in a fully loaded system (one
with all add-in card slots filled) must not
exceed the total number of slots multiplied by
2 amps.
Avertissement : Ne surchargez pas
l'ordinateur en installant des cartes
d'extension qui consomment beaucoup de
courant. L'ordinateur est conçu pour fournir
un courant de 2 ampères (en moyenne), +5
volts, à chaque carte installée sur l'ordinateur.
La consommation totale de courant de +5 V
sur un ordinateur entièrement chargé (dont
tous les logements de cartes sont occupés)
ne doit pas excéder le nombre total de
supports multiplié par 2 ampères.
To add or replace an add-in card:
1Turn off the computer and all peripherals.

2Disconnect the modem/phone cable.
3Disconnect the power cord and all other
attached cables (such as the keyboard,
mouse, and monitor).
4Remove the side panel (see “Removing the
Side Panel” on page 3).
5Gently lay the computer on its side.
6To release the add-in card bracket (A),
push down on the release mechanism (B)
as you pull the bracket.

7Pull the add-in card bracket up and out.
8If you’re adding a new card to a previously
unused slot, remove the expansion slot
cover.
Warning: Be careful of the sharp edges on
the expansion slot cover.
If you’re replacing a card, first disconnect
any external and/or internal cables
attached to the card. Hold the metal
bracket and the far top corner of the card.
Carefully remove the card by pulling the
card straight out of the expansion slot.
9Insert the new card into the slot and push
straight down. Make sure the card is
properly seated.
10 To replace the add-in card bracket, slide
the bracket into the hole (C) and then push
down until the bracket clicks into place.
To reassemble the computer:
1Replace the side panel (see “Replacing the
Side Panel” on page 23).
2Reconnect the power cord and all other
cables.
3Reconnect the modem/phone cable.

4Turn on the computer and all peripherals.
5Install any software drivers supplied by the
card manufacturer.
What Is Plug and Play?
“Plug and Play” describes the ability to add
and remove add-in cards, memory, and
peripherals without any special procedures
(such as resetting jumpers and testing for
system conflicts). The system BIOS (basic
input/output system) finds these
components and adds them to the system.
You do not have to run the BIOS Setup
program.
If the New Card or Device Isn’t
Working
Read through the card manufacturer’s
installation instructions, and recheck all
connections, including those to the card,
power supply, keyboard, and monitor. If the
problem still exists, run the BIOS Setup
program and load the default settings, and
then save and exit. (See “Using the BIOS
Setup Program” in the User’s Guide for more
information.)
Adding and Removing Drives
You can install a second hard drive into the
system or replace the existing hard drive. In
addition, you can replace the existing
diskette or optical drives.
Installing a Second Hard Drive
The HP Pavilion has an empty 3.5-inch drive
bay to accommodate an additional hard
drive.
1Turn off the computer and all peripherals.
2Disconnect the modem/phone cable.
3Disconnect the power cord and all other
attached cables (such as the keyboard,
mouse, and monitor).

4Remove the side panel (see “Removing the
Side Panel” on page 3).
5Remove the drive cage (see “Removing the
Drive Cage” on page 5).
Note: Make sure the jumper on the new drive is in the
CS (Cable Select) position.
6Slide the new drive into the empty bay in
the drive cage, until the screw holes align.
7Install the screws on the drive cage.
8Replace the drive cage (see “Replacing the
Drive Cage” on page 20).
9Attach the power cable to the back ofthe
drive.
10 Attach the connector marked “Master” on
the IDE ribbon cable to the back of the
primary hard drive. After this primary
connection is attached, twist the
remaining part of the cable marked
“Slave” on that same IDE ribbon cable and
connect it to the secondary hard drive.
11 Connect the IDE cable to the motherboard.
To reassemble the computer:
1Replace the side panel (see “Replacing the
Side Panel” on page 23).
2Reconnect the power cord and all other
cables.
3Reconnect the modem/phone cable.
4Turn on the computer and all peripherals.
5Install any software drivers supplied by the
drive manufacturer.
Removing the Preinstalled Hard
Drive
You need to remove the hard drive from the
chassis if you want to replace it with a
higher-capacity drive or if you want to
safeguard your data when sending the
computer out to be repaired.
To remove the preinstalled hard drive:
1Turn off the computer and all peripherals.

2Disconnect the modem/phone cable.
3Disconnect the power cord and all other
attached cables (such as the keyboard,
mouse, and monitor).
4Remove the side panel (see “Removing the
Side Panel” on page 3).
5Remove the drive cage (see “Removing the
Drive Cage” on page 5).
6Remove the two screws on the side of the
hard drive.
7Pull the hard drive out, and store the drive
and screws in a safe location.
8Replace the drive cage and the side panel
(see “Closing the Computer” on page 20).
Replacing the Diskette Drive
If you need to replace the diskette drive, you
can remove the existing drive and install a
new one. To ensure that the drive fits
properly into the HP Pavilion, be sure to
purchase the replacement diskette drive from
HP. Refer to your support path card for the
telephone number of the HP Customer Care
Center.
To remove the existing diskette drive:
1Turn off the computer and all peripherals.
2Disconnect the modem/phone cable.
3Disconnect the power cord and all other
attached cables (such as the keyboard,
mouse, and monitor).
4Remove the side panel (see “Removing the
Side Panel” on page 3).
5Remove the drive cage (see “Removing the
Drive Cage” on page 5).
6Remove the screw (A) on each side of the
diskette drive.

Note: The second screw (A) is on the other side of
the drive cage (not pictured).
7Pull the diskette drive out.
To install a new diskette drive:
1Slide the diskette drive into the drive cage,
until the screw holes align.
2Attach the screws on each side of the drive
cage.
To reassemble the computer:
1Replace the drive cage (see “Replacing the
Drive Cage” on page 20).
2Reattach the cables to the back ofthe
hard and diskette drives.
3Replace the side panel (see “Replacing the
Side Panel” on page 23).
4Reconnect the power cord and all other
cables.
5Reconnect the modem/phone cable.
6Turn on the computer and all peripherals.
Replacing an Optical Drive
Your computer comes with two optical drives
(CD-ROM, DVD, and/or CD-Writer) that you
can replace or upgrade.
To remove an existing optical drive:

1Turn off the computer and all peripherals.
2Disconnect the modem/phone cable.
3Disconnect the power cord and all other
attached cables (such as the keyboard,
mouse, and monitor).
4Remove the side panel (see “Removing the
Side Panel” on page 3).
5Remove the fan duct (see “Removing the
Fan Duct” on page 5).
6Locate the screws (Band C) on the optical
drive.
7If you are removing the bottom optical
drive, remove the two screws (C) on the
drive and push the drive part way out
through the front of the computer.
Or

If you are removing the top optical drive,
remove the screws (Band C) on both
optical drives and push both drives part
way out through the front ofthe computer.
(This allows better access to the cables at
the back of the drive.)
8Remove the cables on the back of the drive
you want to replace.
9Pull the drive out through the front of the
computer.
To install a new optical drive:
Note: Make sure the jumper on the new drive is in the
CS (Cable Select) position.
1Slide the new optical drive through the
front of the computer. Don’t slide the drive
in all the way —you need room to attach
the cables.
2Attach the cables to the back of the
optical drive.
3Push the drive(s) all the way in, aligning
the screw holes.
4Attach the screws.
To reassemble the computer:
1Replace the fan duct and side panel (see
“Closing the Computer” on page 20).
2Reconnect the power cord and all other
cables.
3Reconnect the modem/phone cable.
4Turn on the computer and all peripherals.
5Install any software drivers supplied by the
drive manufacturer.
Replacing the Battery
A lithium battery on the motherboard
provides backup power for the computer’s
timekeeping capability. The battery has an
estimated life expectancy of seven years.
When the battery starts to weaken, the date
and time may be incorrect. If the battery