Compaq 205487-002 - Deskpro EN - 800 MHz Operating and maintenance manual

Hardware Reference Guide
CompaqDeskproENSeriesofPersonalComputers
SmallFormFactorModels
178145-001

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Hardware Reference Guide
Compaq Deskpro EN Series
of Personal Computers
Small Form Factor Models

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Notice
Compaq Computer Corporation shall not be liable for technical or editorial
errors or omissions contained herein. The information in this guide is subject
to change without notice.
© 2000 Compaq Computer Corporation. Except for use in connection with the accompanying
Compaq product, no part of this guide may be photocopied or reproduced in any form without
prior written consent from Compaq Computer Corporation.
COMPAQ, the Compaq logo, and Deskpro Registered in U.S. Patent and Trademark Office.
Microsoft, Windows, Windows NT, and other names of Microsoft products referenced herein
are trademarks or registered trademarks of Microsoft Corporation.
Intel and Pentium are registered trademarks of Intel Corporation. Celeron and MMX are
trademarks of Intel Corporation.
All other product names mentioned herein may be trademarks or registered trademarks of
their respective companies. Printed in U.S.A.
The following words and symbols mark special messages throughout this guide:
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
Compaq Deskpro EN Series of Personal Computers
Small Form Factor Models
First Edition (October 2000)
Part Number 178145-002
Compaq Computer Corporation

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CONTENTS
chapter 1
Installation Guidelines
Installation Sequence............................................................................................................... 1-1
When to Reconfigure the Computer ........................................................................................ 1-3
chapter 2
Hardware Upgrades
Serviceability Features............................................................................................................. 2-1
Drawer Installation Method ............................................................................................... 2-1
Removing the Computer Cover............................................................................................... 2-2
Removing the Expansion Card Cage....................................................................................... 2-4
Installing an Expansion Card................................................................................................... 2-5
Installing Additional Memory ................................................................................................. 2-7
DIMMs............................................................................................................................... 2-7
Memory Module Installation ............................................................................................. 2-7
Upgrading the Hard Drive ..................................................................................................... 2-10
Removing and Installing Drives ............................................................................................ 2-12
Removing a CD-ROM Drive ........................................................................................... 2-12
Installing an Optional DVD-ROM Drive......................................................................... 2-14
Smart Cover Lock.................................................................................................................. 2-16
Using the Smart Cover FailSafe Key............................................................................... 2-16
appendix a
Specifications .................................................................................................................................... A-1
appendix b
Hard Drive Installation Guidelines
Using the Cable-Select Feature with Ultra ATA Devices ...................................................... B-1
Installing SCSI Devices.......................................................................................................... B-2
Guidelines for Installing Optional SCSI Devices ............................................................. B-2
Cabling for Optional SCSI Devices .................................................................................. B-4
Using SCSISelect with SCSI Devices............................................................................... B-5
appendix c
Battery Replacement......................................................................................................................... C-1
appendix d
Security Lock Provisions
Installing a Cable Lock........................................................................................................... D-1

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appendix e
Electrostatic Discharge
Preventing Electrostatic Damage.............................................................................................E-1
Grounding Methods.................................................................................................................E-2
appendix f
Routine Computer Care and Shipping Preparation
Routine Computer Care ...........................................................................................................F-1
CD-ROM Drive Precautions....................................................................................................F-2
Operation ...........................................................................................................................F-2
Cleaning .............................................................................................................................F-2
Safety .................................................................................................................................F-2
Shipping Preparation ...............................................................................................................F-3
Index .....................................................................................................................................................I-1

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chapter 1
INSTALLATION GUIDELINES
This guide explains how to remove the computer cover or access panel
and install the following optional equipment upgrades:
■ Additional system memory
■ Expansion card
■ Optional drive
■ Security lock
■ Replacement battery
This chapter includes information about the general installation
sequence for Deskpro personal computers, and about when to
reconfigure the computer to ensure that it recognizes the newly installed
equipment.
Installation Sequence
It is very important that you follow this sequence of steps to ensure the
proper installation of any optional equipment.
1. If your computer includes the Smart Cover Lock feature and you
have set the lock, use Computer Setup to unlock the lock and
disable the Smart Cover Sensor.
For more information about Computer Setup, refer to the Computer
Setup guide.

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2. If the computer is already on, turn it off and disconnect the power
cord from the wall outlet.
!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.
CAUTION: 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 E,
“Electrostatic Discharge,” for more information.
3. Open the computer by removing its outside cover. Refer to the
procedures for removing the computer cover or access panel.
4. Install any optional equipment. Refer to the applicable sections of
this guide or to the documentation provided with the optional
equipment for instructions.
5. Replace the computer cover.
6. Turn on the monitor, computer, and any devices you want to test.
7. Reconfigure the computer, if necessary. Refer to the Computer
Setup guide for instructions about using Computer Setup.
If you normally lock the Smart Cover Lock, use Computer Setup to
relock the lock and enable the cover removal sensor.

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When to Reconfigure the Computer
System configuration is the process of specifying the devices and
programs that make up a computer system. When you add or remove
optional equipment, the computer must be reconfigured to recognize
these changes.
Windows 95 and later operating systems automatically recognize all
Plug and Play devices installed. However, if the device is not a Plug and
Play device or is not automatically detected after installation, follow
these instructions:
■ In Windows 95 and later operating systems, select the Add New
Hardware icon in the Control Panel and follow the instructions on
the screen.
■ To reconfigure the computer in Windows NT version 4.0, use the
software utility provided with the newly installed hardware.

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chapter 2
HARDWARE UPGRADES
Serviceability Features
Your computer allows for easier upgrades and service with a slide-out
system board and tool-less access to most internal components. Quick
release cover latches, located on the sides of the computer, allow easy
removal of the computer cover without the use of tools.
Drawer Installation Method
When installing the computer chassis in a drawer, the following
conditions must be met to ensure proper air flow:
■ At least 3 inches (7.6 cm) of clear space between the back of the
drawer and anything behind it, such as a wall or the back panel of a
desk.
■ At least two 2-inch (5.1-cm) diameter holes in the back of the
drawer. One hole must be immediately behind the power supply for
exhaust air, and the other should be used for routing the cables.
CAUTION: Cables should not be run through the exhaust air hole.
■ At least nine holes in the front drawer panel or in the bottom of the
drawer in front of the chassis for fresh air intake. The diameter of
the holes must be between 0.38 and 0.5 inch (1.0 and 1.3 cm).

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■ If vent holes are located in the bottom of the mounting drawer,
allow at least 1 inch (2.54 cm) of clear space below the drawer to
ensure proper air flow.
■ At least 1 inch (2.54 cm) of clear space above the top of the
chassis.
Removing the Computer Cover
To install optional equipment, you must remove the computer cover to
gain access to internal components. The quick release cover latches
located on the sides of the computer allow easy removal of the
computer cover without the use of tools. To remove the cover, follow
these steps:
1. If you have locked the Smart Cover Lock, use Computer Setup to
unlock it.
2. Turn off the computer and any external devices.
3. Disconnect the power cord from the power outlet, and disconnect
any external devices.
!WARNING: Before removing the computer cover, ensure that the
computer is turned off and that the power cord is disconnected from
the electrical outlet.

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4. Press in the button on each side of the front bezel to release the
quick release cover latches.
5. As you slide the computer cover forward, release the buttons and
allow them to return to the original position, then lift the cover up
and off the unit.
✎To replace the cover, reverse this procedure.
Removing the Computer Cover

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Removing the Expansion Card Cage
To remove the expansion card cage:
1. If you have locked the Smart Cover Lock, use Computer Setup to
unlock it.
2. Turn off the computer and any external devices.
3. Disconnect the power cord from the power outlet, and disconnect
any external devices.
4. Remove the computer cover.
5. Disconnect all cables attached to the system board.
6. Pull the expansion card cage straight up to remove it from the
chassis.
Removing the Expansion Card Cage
✎When reinstalling the expansion card cage, ensure that the tab
on the brace latches into the slot on the side of the power
supply.

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Installing an Expansion Card
Your computer has three PCI expansion slots 1 . Each slot can
accommodate an expansion card up to 6.88 inches (17.48 cm) in length.
To install an expansion card:
1. If you have locked the Smart Cover Lock, use Computer Setup to
unlock it.
2. Turn off the computer and any external devices.
3. Disconnect the power cord from the power outlet, then disconnect
any external devices.
4. Remove the computer cover.
5. Remove the expansion card cage and identify the slot into which
you want to insert the expansion card.
Location of Expansion Slots in the Expansion Card Cage

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6. Remove the retaining screws that secure the slot cover to the
expansion card cage.
7. Remove the slot cover from the expansion card cage.
Removing the Expansion Slot Cover
8. Install the expansion card.
Installing an Expansion Card
✎When you install an expansion card, make sure you press
firmly on the card so that the whole connector seats properly in
the expansion card slot.
9. Reinstall the retaining screws to secure the card.

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Installing Additional Memory
The computer comes with:
■ Synchronous dynamic random access memory (SDRAM) dual
inline memory modules (DIMMs)
DIMMs
The memory sockets on the Intel 815e chipset–based system board can
be populated with industry-standard DIMMs. These memory module
slots are populated with at least one preinstalled memory module. To
achieve the maximum memory support, you may be required to replace
the preinstalled DIMM with a higher capacity DIMM.
For proper system operation, the DIMMs must be industry-standard
168-pin, unbuffered PC100– or PC133– compliant SDRAM DIMMs,
depending on the model. The SDRAM DIMMs must support CAS
Latency 2 or 3 (CL = 2 or CL = 3). They must also contain the
mandatory Joint Electronic Device Engineering Council (JEDEC)
Serial Presence Detect (SPD) information. DIMMs constructed with x4
SDRAM are not supported; the system will not start using unsupported
DIMMs.
The Intel 815e chipset supports both PC100 and PC133 SDRAM
DIMMs. PC133 DIMMs should be used for optimal operation. If both
PC100 and PC133 SDRAM DIMMs are installed in a computer, the
system memory will run at the lower 100Mhz speed. Some
configurations of PC133 SDRAMs may run at 100Mhz, instead of
133Mhz.
Memory Module Installation
CAUTION: Your memory module sockets have gold metal contacts.
When upgrading your 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. Refer to Appendix E,
“Electrostatic Discharge,” for more information.
CAUTION: When handling a memory module, be careful not to touch
any of the contacts. Doing so may damage the module.

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1. If you have locked the Smart Cover Lock, use Computer Setup to
unlock the lock.
2. Shut down the operating system properly, then turn off the
computer and any external devices, then disconnect the power cord
from the power outlet.
3. Remove the computer cover.
4. Rotate the easy access drive bay to an upright position.
CAUTION: Check the position of all cables and wires before raising
or lowering the easy access drive bay to prevent damage.
Rotating the Easy Access Drive Bay
5. Locate the memory module sockets.
DIMM Sockets
!WARNING: To reduce risk of personal injury from hot surfaces, allow
the internal system components to cool before touching.

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6. Open both latches of the memory module socket 1 , and insert the
memory module into the socket
2 .
Installing a DIMM
7. Begin by installing a module into the socket nearest the preinstalled
module, and install the modules following the numerical order of
the sockets.
8. A memory module can be installed in only one way. Match the
notch on the module with the tab on the memory socket. Push the
module down into the socket, ensuring that the module is fully
inserted and properly seated
3 .
9. Repeat step 6 for any additional modules that you want to install.
10. Replace the computer cover.
11. If you normally lock the Smart Cover Lock, use Computer Setup to
relock the lock and enable the Smart Cover Sensor.
12. The computer should automatically recognize the additional
memory the next time you power on the computer.

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Upgrading the Hard Drive
The 3.5-inch hard drive is located on the left side of the computer. To
remove and replace the drive:
1. If you have locked the Smart Cover Lock, use Computer Setup to
unlock it.
2. Turn off the computer and any external devices.
3. Disconnect the power cord from the power outlet, and disconnect
any external devices.
4. Remove the computer cover.
5. Disconnect the
1 power cable and 2 signal cable from the back of
the drive.
Disconnecting Cables from the Hard Drive

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6. Push the locking lever on the right side of the drive to the right
(facing the front of the computer.) Slide the drive to the rear of the
bay, then lift the drive from the bay.
Removing the Hard Drive (Shown from the Rear of the Chassis)
✎When replacing the hard drive, transfer the four screws from
the old drive to the new one. The screws take the place of drive
rails.
✎If you have installed a hard drive that is not automatically
recognized by the computer, refer to Chapter 1, “Installation
Guidelines.”

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CAUTION: To prevent loss of work and damage to the computer or
drive:
■ If you are inserting or removing a hard drive, turn off
the computer. Do not remove a hard drive while the
computer is on or in standby mode.
■ Before handling a drive, ensure that you are
discharged of static electricity. While handling a drive,
avoid touching the connector. For more information
about preventing electrostatic damage, refer to
Appendix E, “Electrostatic Discharge.”
■ Handle a drive carefully, do not drop it.
■ Do not use excessive force when inserting a drive.
■ Avoid exposing a hard drive to liquids, temperature
extremes, or products that have magnetic fields such
as monitors or speakers.
■ If a drive must be mailed, place the drive in a bubble-
pack mailer or other suitable protective packaging and
label the package “Fragile: Handle With Care.”
Removing and Installing Drives
The computer has two external drive bays. The first external bay
contains a preinstalled diskette drive. This section describes how to
remove the CD-ROM drive and install a DVD-ROM drive into the
second external bay.
To verify the type and size of the mass storage devices installed in your
computer, run Compaq Computer Setup. Refer to the Computer Setup
Guide for more information.
Removing a CD-ROM Drive
CAUTION: All removable media should be taken out of the drives
before removing the drive from the computer.
1. If you have locked the Smart Cover Lock, use Computer Setup to
unlock it.
2. Turn off the computer and any external devices.
3. Disconnect the power cord from the power outlet, and disconnect
any external devices.
4. Remove the computer cover.
5. Rotate the drive cage to the upright position.
6. Rotate the power supply to the upright position.