HP Compaq SP750, SP750 Reference Manual

Compaq Professional Workstation SP750

Hardware Reference Guide

Professional Workstation SP750

Hardware Reference Guide

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 and the Compaq logo Registered in U.S. Patent and Trademark Office.

Microsoft, Windows, Windows NT, Windows 2000 Professional, 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.

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:

to follow directions could result in bodily harm or loss of life.

CAUTION:

to follow directions could result in damage to equipment or
loss of information.

Text set off in this manner indicates that failure

Text set off in this manner indicates that failure

Compaq Professional Workstation SP750

Hardware Reference Guide

First Edition (June 2000)
Part Number 190709-001

Compaq Computer Corporation

chapter 1

Product Features

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

Front Panel Components......................................................................................................... 1-2

Rear Panel Components .......................................................................................................... 1-3

System Board Components ..................................................................................................... 1-4

Windows Logo Key ................................................................................................................1-5

Special Mouse Functions.........................................................................................................1-5

Serial Number Location ..........................................................................................................1-5

chapter 2

Hardware Upgrades

Installation Sequence............................................................................................................... 2-2

Removing the Workstation Access Panel................................................................................ 2-3

Removing the Front Bezel....................................................................................................... 2-4

Installing Additional Memory................................................................................................. 2-5

Removing a Memory Board .............................................................................................. 2-5

Eight-RIMM Slot Memory Board ..................................................................................... 2-7

Configurations for RIMM Installation......................................................................... 2-7

Configuration 1............................................................................................................ 2-7

Configuration 2............................................................................................................ 2-8

Configuration 3............................................................................................................ 2-8

Configuration 4............................................................................................................ 2-8

Guidelines for RIMM Installation ..................................................................................... 2-9

Installing RIMMs ............................................................................................................ 2-10

Removing RIMMs........................................................................................................... 2-12

Installing a Memory Board.............................................................................................. 2-12

Installing Additional Drives .................................................................................................. 2-14

Drive Bay Components ................................................................................................... 2-14

Preparing for Drive Installation....................................................................................... 2-16

Removing the Bezel Blank ........................................................................................ 2-16

Removing and Replacing the Removable Hard Drive Cage...................................... 2-17

Removing the Cooling Shield.................................................................................... 2-18

Locating the Hardware Screws .................................................................................. 2-19

Installing a Drive ............................................................................................................. 2-20

Installing a Hard Drive in Bays 5 and 6..................................................................... 2-20

Installing a Hard Drive in the Removable Hard Drive Cage (Bays 1-3) ................... 2-23

ONTENTS

C

Compaq Professional Workstation SP750 Hardware Reference Guide iii

Installing and Removing an Expansion Board...................................................................... 2-26

Identifying the PCI Expansion Slots................................................................................ 2-26

Installing an Expansion Board......................................................................................... 2-27

Removing an Expansion Board ....................................................................................... 2-29

Identifying the AGP Graphics Controller Expansion Slot............................................... 2-29

Installing and Removing an AGP Graphics Controller ................................................... 2-30

Installing a Processor ............................................................................................................ 2-31

Index..................................................................................................................................................... I-1

iv Contents

?D=FJAH

RODUCT FEATURES

P

Standard Configuration Features

Features of the Compaq Professional Workstation SP750 may vary
depending on your model. For a complete listing of the hardware and
software installed in your workstation, run the INSPECT utility
described in the Troubleshooting Guide.



Compaq Professional Workstation SP750 Hardware Reference Guide 1-1

Front Panel Components

1-2 Product Features

Front panel components

1 Power-on light
2 Power button
3 Hard drive activity light
4 Network activity light
5 CD-ROM (Bay 4)
6 Open bay (Bay 5)
7 Open bay (Bay 6)
8 Diskette bay (Bay 7)
9 Speaker

* An optional ZIP drive can be installed in bay 5 or 6.

Rear Panel Components

Rear panel components

1 Power cord connector
2 Ultra3 SCSI connector
3 Keyboard connector
4 Two universal serial bus (USB) connectors
5 Line-out audio connector
6 Headphone connector
7 Parallel connector
8 Serial connector B
9 Mouse connector

− Serial connector A
; RJ-45 connector

< Line-in audio connector
= Microphone connector
> VGA (AGP) connector

Compaq Professional Workstation SP750 Hardware Reference Guide 1-3

System Board Components

System board components

1 Power connectors ρ Power switch and LED connector
2 Power-on password (P49) enable jumper τ Diskette drive connector
3 Battery ψ Secondary Ultra ATA (IDE) connector
4 Primary processor slot υ Primary Ultra ATA (IDE) connector
5 Secondary processor slot ι Memory board connector
6 Processor cage fan connector ο SCSI option card and LED connector
7 Back processor fan connector π CD audio connector
8 External Ultra3 SCSI connector α Speaker connector
9 Ultra3 SCSI connector (Channel B) σ SW50 CMOS pushbutton switch

− Ultra3 SCSI connector (Channel A) δ Alert on LAN connector
θ AGP expansion slot φ Wake on LAN connector

ω PCI expansion slots 1-4 γ Hood sensor connector

ε PCI expansion slots 5 and 6 η Chassis fan connector

1-4 Product Features

Windows Logo Key

Use the Windows Logo Key in combination with other keys to perform
certain functions in Windows 2000 Professional and Windows NT
Workstation 4.0.

Special Mouse Functions

Most software applications support the use of a mouse. The functions
assigned to each mouse button depend on the software application you
are using.

Windows logo key + F1 Displays a pop-up menu for the

selected object.

Windows logo key + Tab Activates the next Taskbar button.

Windows logo key + E Launches Explore My Computer.

Windows logo key + F Launches Find Document.

Windows logo key + Ctrl + F Launches Find Computer.

Windows logo key + M Minimizes all open applications.

Shift+Windows logo key + M Undoes Minimize All.

Windows logo key + R Displays Run dialog box.

Serial Number Location

Each computer has a unique serial number located on the corner of the
computer access panel and on the rear panel of the computer. Keep this
number available when contacting Compaq customer service.

Compaq Professional Workstation SP750 Hardware Reference Guide 1-5

?D=FJAH



ARDWARE UPGRADES

H

This chapter explains how to access the Compaq Professional
Workstation SP750 by removing the workstation access panel and front
bezel. It also explains how to install the following replacement
hardware:

■ Memory

■ Drives

■ Expansion boards

■ Processors

✎

Compaq recommends that you finish the setup procedures for
the preinstalled software before you install any optional
hardware or third-party devices that were not included with
your workstation.

Compaq Professional Workstation SP750 Hardware Reference Guide 2-1

Installation Sequence

Follow this sequence of steps to ensure the proper installation of any
optional equipment. Before you begin, observe the following
precautions:

WARNING: To reduce the risk of personal injury from hot surfaces,

!

allow the internal system components to cool before touching them.

WARNING: To reduce the risk of electric 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 workstation or optional equipment. Before beginning these
procedures, ensure that you are discharged of static electricity by
briefly touching a grounded metal object.

1. Turn off the workstation and disconnect the power cord from the
grounded AC outlet and the back of the workstation.

2. Open the workstation by removing its workstation access panel.
See the section,  Removing the Workstation Access Panel, in
this chapter for instructions.

2-2 Hardware Upgrades

3. If you are installing or removing drives in the front bays, see the
section,  Removing the Front Bezel, in this chapter for
instructions.

4. Install any optional equipment, such as memory, drives, expansion
boards, a processor, or battery. See the appropriate sections in this
chapter or the appendix for installation instructions.

5. Replace the front bezel and the workstation access panel, if
necessary.

6. Reconnect the power cord to the back of the workstation and plug
the power cord into a grounded AC outlet.

7. Turn on the monitor, workstation, and any devices you installed.

8. Reconfigure the workstation, if necessary.

9. Test the workstation (optional) using the TEST utility.

Removing the Workstation Access Panel

To remove the workstation access panel:

1. Turn off the workstation and any external devices.

2. Disconnect the power cord from the grounded AC outlet and the
back of the workstation.

3. Refer to the following illustration to remove the workstation
access panel.

Loosening the four thumbscrews and the workstation access panel

✎

When replacing the workstation access panel, be sure to
tighten all four thumbscrews.

Compaq Professional Workstation SP750 Hardware Reference Guide 2-3

Removing the Front Bezel

To remove the front bezel:

1. Turn off the workstation and any external devices.

2. Disconnect the power cord from the grounded AC outlet and the

3. Remove the workstation access panel. Refer to the instructions in

4. Push in on the two front bezel release tabs, then rotate the front

back of the workstation.

 Removing the Workstation Access Panel in this chapter.

bezel away from the chassis to release it.

2-4 Hardware Upgrades

Pressing the front bezel release latches to remove the front bezel

✎

When replacing the front bezel, ensure that the bottom hinge
points are properly placed in the chassis before rotating the
front bezel back into its original position.

Installing Additional Memory

The workstation supports Error Checking and Correcting (ECC) Direct
Rambus inline memory modules (RIMMs). Additional RIMMs are
available to upgrade the memory. A maximum of 32 count devices is
supported on each Rambus channel. Continuity RIMMs (CRIMMs)
must populate any empty slots.

Removing a Memory Board

To remove a memory board to install additional memory:

1. Turn off the workstation and disconnect the power cord from the
grounded AC outlet and the back of the workstation.

2. Remove the workstation access panel and locate the memory board
that is connected to the workstation system board.

3. Loosen the thumbscrew on the back of the metal slot cover that
secures the memory board to the expansion slot.

Loosening the thumbscrew on the back of the metal slot cover

4. To release the memory board, press downward on the plastic
release latch that holds the memory board in the memory board
retainer.

5. Carefully remove the memory board from the memory board
connector.

Compaq Professional Workstation SP750 Hardware Reference Guide 2-5

Releasing and removing the memory board from the memory board connector

6. Locate the appropriate RIMM slots and install the additional
memory modules.

2-6 Hardware Upgrades

Eight-RIMM Slot Memory Board

Your workstation ships with an eight-RIMM slot memory expansion
board (four RIMM slots per memory channel).

Location of eight RIMM slots

1 RIMM Slot 1, Channel B
2 RIMM Slot 2, Channel A
3 RIMM Slot 3, Channel B
4 RIMM Slot 4, Channel A
5 RIMM Slot 5, Channel B
6 RIMM Slot 6, Channel A
7 RIMM Slot 7, Channel B
8 RIMM Slot 8, Channel A

Configurations for RIMM Installation

When installing RIMMs on the eight-RIMM slot memory board, you
must follow one of the following four configurations for optimal
performance:

Configuration 1

Location Contents

RIMM Slots 1 and 2 C-RIMM

RIMM Slots 3 and 4 RIMM

RIMM Slots 5 and 6 Empty

RIMM Slots 7 and 8 Empty

Compaq Professional Workstation SP750 Hardware Reference Guide 2-7

Configuration 1

One Pair of RIMMs

Configuration 2

Configuration 3

Configuration 2

Two Pairs of RIMMs

Location Contents

RIMM Slots 1 and 2 C-RIMM

RIMM Slots 3 and 4 RIMM

RIMM Slots 5 and 6 RIMM

RIMM Slots 7 and 8 C-RIMM

Configuration 3

Three Pairs of RIMMs

Location Contents

RIMM Slots 1 and 2 RIMM

RIMM Slots 3 and 4 RIMM

RIMM Slots 5 and 6 RIMM

RIMM Slots 7 and 8 C-RIMM

2-8 Hardware Upgrades

Configuration 4

Configuration 4

Four Pairs of RIMMs

Location Contents

RIMM Slots 1 and 2 RIMM

RIMM Slots 3 and 4 RIMM

RIMM Slots 5 and 6 RIMM

RIMM Slots 7 and 8 RIMM

WARNING: To reduce the risk of personal injury when replacing or

!

removing RIMMs, allow the module being removed from the RIMM
slot sufficient time to cool before touching it. RIMM temperatures can
reach 100°C (212°F).

CAUTION: When handling a RIMM, do not touch any of the contacts.
Doing so may damage the module.

CAUTION: Static electricity can damage the electronic components
of the workstation or option boards. Before beginning these memory
upgrade procedures, ensure that you are discharged of static
electricity by briefly touching a grounded metal object.

Before installing additional RIMMs, read  Guidelines for RIMM
Installation in this chapter.

Guidelines for RIMM Installation

When installing RIMMs, you must follow the guidelines listed below:

■ A RIMM can be installed only one way. Be sure to match the two

key slots on the RIMM with the tabs on the RIMM socket. Push
the RIMM down into the RIMM socket, ensuring that it is fully
inserted and properly seated, and that the retaining arms are locked
in place.

■ CRIMMs must be installed in all empty RIMM sockets. The

CRIMMs are removed when you populate the sockets with
RIMMs. For examples on the correct configuration sequence,
refer to the previous section, Configurations for RIMM
Installation.

■ Install RIMMs in pairs across both memory channels. Each RIMM

socket populated with a RIMM or CRIMM on channel A must be
populated with an identical RIMM or CRIMM on Channel B. For
examples on the correct configuration sequence, refer to the
previous section, Configurations for RIMM Installation.

■ Do not exceed 32-count Direct RDRAM devices on each Direct

Rambus memory channel. A label on the RIMM will indicate the
number of Direct RDRAM devices on the RIMM and their speed.

✎

■ Do not mix RIMMs with different memory speeds. Performance

You cannot remove or add Direct RDRAMS to a RIMM
because the Direct RDRAMS are soldered on and encased by
another material.

will reflect the lowest speed RIMMs.

Compaq Professional Workstation SP750 Hardware Reference Guide 2-9

Installing RIMMs

■ For proper system operation, the RIMMs must be industry-

standard, 168-pin, unbuffered RIMMs. The RIMMs must support
CAS Latency 2 or 3 (CL = 2 or CL = 3). They also must contain
the mandatory Joint Electronic Device Engineering Council
(JEDEC) Serial Presence Detect (SPD) information.

CAUTION: Static electricity can damage the electronic components
of the workstation or option boards. Before beginning these
procedures, ensure that you are discharged of static electricity by
briefly touching a grounded metal object.

CAUTION: The above guidelines must be followed when installing
RIMMs or your workstation will not function.

CAUTION: When handling a memory module, do not touch any of the
contacts. Doing so can damage the module.

WARNING: To reduce the risk of personal injury, when replacing or

!

removing RIMMs, allow the module being removed from the RIMM
slot sufficient time to cool before touching it. RIMM temperatures can
reach 100°C (212°F).

2-10 Hardware Upgrades

CAUTION: When handling a RIMM, do not touch any of the contacts.
Doing so may damage the module.

CAUTION: Static electricity can damage the electronic components
of the workstation or option boards. Before beginning these
procedures, ensure that you are discharged of static electricity by
briefly touching a grounded metal object.

Before installing additional RIMMs, read  Guidelines for RIMM
Installation in this chapter.

✎

To install a RIMM after the memory board has been removed from
your workstation system board:

✎

CRIMMs must be installed in all unpopulated RIMM slots on
channels being used.

See  Removing a Memory board in this chapter for
instructions on removing the memory board.

1. Turn off the workstation and any external devices, then disconnect
the power cord from the grounded AC outlet.

2. Remove the workstation access panel.

3. Press outward on the two RIMM slot retainer latches.

4. Place the RIMM in the appropriate RIMM slot and ensure that it is
fully inserted and properly seated.

CAUTION: Be sure to follow the correct configuration guidelines
respective to your memory board or your system will not function.

5. Press inward on the two retainer latches to secure the RIMM in the
slot.

Installing a RIMM

6. Reinstall the memory board. See  Installing a Memory Board in
this chapter.

7. Replace the workstation access panel.

8. Plug the power cord back into the grounded AC outlet. Reconnect
any external devices.

9. Turn on the workstation.

The workstation should automatically recognize the added memory.

Compaq Professional Workstation SP750 Hardware Reference Guide 2-11

Removing RIMMs

To remove a memory module from a RIMM slot, reverse the previous
procedure.

Installing a Memory Board

To install a memory board:

1. Place the memory board into the memory board connector slot.

When installing a memory board, press firmly on the board so that
the whole connector seats properly in the memory board slot.

✎

2. Tighten the thumbscrew on the memory board metal slot cover.

3. Replace the workstation access panel.

4. Reconnect external devices. Plug the power cord back into the

After you install the memory board, make sure the board is
engaged with the card guide.

grounded AC outlet.

2-12 Hardware Upgrades

Locating the memory board connector 1 on the system board

Installing a memory board

Tightening the thumbscrew to secure the memory board

Compaq Professional Workstation SP750 Hardware Reference Guide 2-13

Installing Additional Drives

Drive Bay Components

Your workstation supports up to seven drive bays. See the following
list for a description of the drive bay components.

2-14 Hardware Upgrades

Identifying drive bay components

The workstation provides seven drive bays. Bays 1 through 3 are
located in the 3.5-inch removable hard drive cage, which is located
behind the workstation access panel of the workstation. Drive bays 4
through 7 are located on the front of the workstation. The drives
support various drive configurations.

1

Bay 1  Part of the removable hard drive cage. A 3.5-inch,
third-height bay that supports a 1.0-inch hard drive or a

1.6-inch hard drive.

2

Bay 2  Part of the removable hard drive cage. A 3.5-inch,
third-height bay that supports a 1.0-inch hard drive. Bay 2 is
not available when a 1.6-inch hard drive is installed in either
bay 1 or bay 3.

3

Bay 3  Part of the removable hard drive cage. A 3.5-inch,
third-height bay that supports a 1.0-inch hard drive or a

1.6-inch hard drive.

4

Bay 4  A 5.25-inch, half-height bay that supports 1.0-inch or

1.6-inch storage devices. Either a CD-ROM drive or
DVD-ROM drive is shipped in bay 4.

5

Bay 5  A 5.25-inch, half-height bay that supports 1.0-inch or

1.6-inch storage devices.

6

Bay 6  A 5.25-inch, half-height bay that supports 1.0-inch or

1.6-inch storage devices.

7

Bay 7  A 3.5-inch, third-height bay that supports a 1.0-inch
device. A standard 3.5-inch diskette drive is shipped in bay 7.

✎

An optional ZIP drive can be installed in bay 5 or bay 6.

Compaq Professional Workstation SP750 Hardware Reference Guide 2-15

Preparing for Drive Installation

Removing the Bezel Blank

You need to remove the drive bezel blank before installing any
removable media storage device, such as a tape drive, CD-ROM or
DVD-ROM drive, or diskette drive, in an empty bay location.

To remove the bezel blank:

1. Turn off the workstation and any external devices.

2. Disconnect the power cord from the grounded AC outlet and the
back of the workstation.

3. Remove the workstation access panel.

4. Remove the front bezel.

5. Loosen the thumbscrews and remove the bezel blank.

2-16 Hardware Upgrades

Removing the bezel blank from the subpanel

Removing and Replacing the Removable Hard Drive Cage

Removing the Removable Hard Drive Cage

To remove the removable hard drive cage:

1. Turn off the workstation and any external devices.

2. Disconnect the power cord from the grounded AC outlet and from
the back of the workstation.

3. Remove the workstation access panel.

4. Unscrew the thumbscrews on the top of the cage 1. Hold the tab 2

and pull the cage up and out of the workstation chassis.

Loosening the two thumbscrews and removing the removable
hard drive cage

Replacing the Hard Drive Cage

To replace the removable hard drive cage, reverse the steps in the
previous section.

Compaq Professional Workstation SP750 Hardware Reference Guide 2-17

Removing the Cooling Shield

A cooling shield covers bays 5 and 6 to provide proper cooling and
EMI protection. The cooling shield must be removed before installing a
hard drive in either of these bay locations.

To remove a cooling shield:

1. Turn off the workstation and any external devices.

2. Disconnect the power cord from the grounded AC outlet and the
back of the workstation.

3. Remove the workstation access panel and front bezel.

4. Refer to the following illustration to remove a cooling shield.

2-18 Hardware Upgrades

Removing a cooling shield

5. Replace the shield after the drive is installed in the bay.

To replace the cooling shield, reverse the above procedure.

Locating the Hardware Screws

A total of 17 extra hardware screws are provided on the side of the air

plenum. The top group of eight screws 1 is for installing hard drives in
the removable hard drive cage. The bottom group of nine screws 2 is

for installing removable media storage devices in the front drive bays.

Locating the hardware screws for drive bay installations

Compaq Professional Workstation SP750 Hardware Reference Guide 2-19

Installing a Drive

Installing a Hard Drive in Bays 5 and 6

Drive bays 5 and 6 can be configured with either 1.0-inch or 1.6-inch
hard drives. Other than using different screw holes, the installation for
both drives is basically the same.

CAUTION: Use only 3/16-inch guide screws. Longer screws can
damage the internal components of the drive.

✎

To install a hard drive in bays 5 or 6:

1. Turn off the workstation and disconnect the power cord from the

2. Remove the Workstation access panel. Refer to Removing the

3. Remove the front bezel. Refer to  Removing the Front Bezel in

4. Remove the cooling shield. Refer to  Removing the Cooling

5. Refer to the following illustrations to install a hard drive in bay 5

If you are installing a SCSI device, read the section SCSI
Devices and Guidelines in the Appendix C.

grounded AC outlet and the back of the workstation.

Workstation Access Panel in this chapter.

this chapter.

Shield in this chapter.

or bay 6.

2-20 Hardware Upgrades

Installing a hard drive in the hard drive bracket

Installing a hard drive

Replacing the cooling shield

Compaq Professional Workstation SP750 Hardware Reference Guide 2-21

Connecting the SCSI signal cable and power cable

6. Reassemble the workstation.

✎

Reverse the above procedures to remove a hard drive from bay 5 and
bay 6.

If only one SCSI hard drive is used, install it in the lowest
numbered bay (bay 1).

2-22 Hardware Upgrades

Installing a Hard Drive in the Removable Hard Drive Cage (Bays 1-3)

The removable hard drive cage can be configured with up to three

1.0-inch hard drives or two 1.6-inch hard drives. Other than using

different screw holes, the installation for both types of drives is
basically the same.

✎

To install a 1.0-inch hard drive in the removable hard drive cage:

1. Turn off the workstation and disconnect the power cord from the

2. Remove the workstation access panel and the removable hard

3. Remove four of the hard drive screws (top group of screws) from

4. Install the screws into the drive cage. Refer to the following

Prior to installing a SCSI device, read the instructions  SCSI
Devices and Guidelines in the Appendix C.

grounded AC outlet and the back of the workstation.

drive cage.

the side of the air plenum located at the front of the workstation.
See  Locating the Hardware Screws in this chapter.

illustration for screw locations.

Locating the hard drive screw holes

1 1.0-inch drive
2 1.6-inch drive
3 1.0-inch drive
4 1.0-inch or 1.6-inch drive

Compaq Professional Workstation SP750 Hardware Reference Guide 2-23

5. Refer to the following illustrations to install an optional hard drive
in the removable hard drive cage.

Installing a 1.0-inch hard drive in bay 2

2-24 Hardware Upgrades

Reinstalling the removable hard drive cage

CAUTION: Use only 3/16-inch guide screws. Longer screws can
damage the internal components of the drive.

Connecting the signal and power cables

6. Reassemble the workstation.

Reverse the above procedures to remove a drive from the removable
hard drive cage.

Compaq Professional Workstation SP750 Hardware Reference Guide 2-25

Installing and Removing an Expansion Board

This section provides instructions for installing and removing PCI and
AGP expansion boards.

✎

For product documentation related to your graphics controller,
refer to the Workstation Reference Library CD included with
your workstation.

Identifying the PCI Expansion Slots

This workstation contains two 64-bit and four 32-bit PCI expansion
slots. The following illustration identifies the physical locations of
these slots.

2-26 Hardware Upgrades

Identifying PCI expansion slots

1

Four 32-bit PCI expansion slots, primary bus

2

Two 64-bit PCI expansion slots, secondary bus

Installing an Expansion Board

To install a PCI expansion board:

1. Turn off the workstation and disconnect the power cord from the
grounded AC outlet and the back of the workstation.

2. Remove the workstation access panel and locate the correct vacant
slot in the workstation chassis.

3. Remove the screw securing the expansion slot cover, then remove
the slot cover, as illustrated.

To replace an expansion slot cover, reverse the above procedure.

Removing the screw and expansion slot cover

Compaq Professional Workstation SP750 Hardware Reference Guide 2-27

4. Slide the expansion board into the expansion slot. Press firmly on
the board so that the whole connector seats properly in the
expansion board slot.

✎

5. Replace the screw at the side of the expansion slot.

If you are installing a full-length PCI board, make sure the
card is engaged with the card guide.

Installing an expansion board

2-28 Hardware Upgrades

6. Replace the workstation access panel.

7. Connect external cables to the installed board, if necessary.

8. Plug the power cord back into the grounded AC outlet and the
back of the workstation.

9. Turn on the system.

10. Reconfigure the workstation, if necessary.

Removing an Expansion Board

Reverse the steps in the previous section to remove an expansion
board. When reversing these steps:

❏ Be sure to store the board in antistatic packaging.
❏ Install an expansion slot cover to close the open slot.

Identifying the AGP Graphics Controller Expansion Slot

Your workstation also ships with an Accelerated Graphics Port (AGP)

expansion slot on the system board 1. The following illustration shows

the location of this slot.

Identifying the AGP graphics controller expansion slot

✎

✎

AGP specifications allow an AGP card to occupy up to two
adjacent PCI slots, with additional components or cards, on
your workstation system board.

For product documentation related to your graphics controller,
refer to the Workstation Reference Library CD included with
your workstation.

Compaq Professional Workstation SP750 Hardware Reference Guide 2-29

Installing and Removing an AGP Graphics Controller

To install the AGP graphics controller, remove the metal slot screw and
cover, insert the board into the AGP slot, and press the board firmly
into place. Replace the metal slot screw. See  Installing an Expansion
Board in this chapter for more information.

To ensure the board fits properly, use an AGP graphics controller with
an ATX format bracket.

When installing an AGP board, press firmly on the board so that the
whole connector seats properly in the AGP slot. If you are installing a
full-length expansion board, be sure to engage the card guide.

To remove the AGP graphics controller, remove the metal slot screw,
hold the board at each end, and then pull up. Be sure to replace the
metal slot screw and cover. See Removing an Expansion Board in
this chapter for more information.

2-30 Hardware Upgrades

Installing a Processor

You can upgrade the workstation to a multiprocessor system. When
you install a second processor, it must be the same speed, cache size,
and type as the existing processor.

WARNING: To reduce the risk of personal injury from hot surfaces,

!

allow the internal system components to cool before touching them.

CAUTION: Installing the processor incorrectly may cause damage
the system board. Have a Compaq authorized reseller or service
provider install the processor. If you plan to install it yourself, read all
of the instructions carefully before you begin.

To install a second processor:

1. Turn off the workstation and disconnect the power cord from the
grounded AC outlet and the back of the workstation.

2. Remove the workstation access panel. Refer to Removing the
Workstation Access Panel in this chapter.

3. Insert the processor 1, then close the two release latches 2.

4. Tighten the middle screw 3.

Installing a second processor

Compaq Professional Workstation SP750 Hardware Reference Guide 2-31

CAUTION: A primary processor must be installed in the primary
processor slot when installing a second processor or your
workstation will not function.

5. Reassemble the workstation and connect the power cord that was
disconnected from the grounded AC outlet and the back of the
workstation.

When replacing the workstation access panel, be sure to tighten all
four thumbscrews.

✎

If you are installing a second processor, you must upgrade the
Hardware Abstraction Layer (HAL), which is part of
Windows NT 4.0. For information on upgrading to a
multiprocessor HAL, refer to the documentation included in
your processor upgrade kit.

2-32 Hardware Upgrades

appendix A

PECIFICATIONS

S

Compaq Professional Workstation SP750

Component U.S. Metric

Dimensions

Height
Width
Depth

Approximate Weight 54.75 lb 24.89 kg

Power Supply

Operating Voltage Range
Rated Voltage Range
Rated Line Frequency

Temperature

Operating
Shipping

Humidity (noncondensing)

Operating
Nonoperating

Maximum Altitude (unpressurized)

Operating
Nonoperating

Power Output 425 W

Rated Input Current (maximum) 8 A 4 A

Heat Dissipation (maximum) 2418 Btu/hr 609 kg-cal/hr

18.7 inch

8.03 inch

23.2 inch

115 VAC

90-132 VAC
100-127 VAC
50-60 Hz

50° to 104°F
4° to 140°F

20% to 80%
10% to 90%

10,000 ft
30,000 ft

47.50 cm

20.40 cm

58.90 cm

230 VAC

180-264 VAC
200-250 VAC
50-60 Hz

10° to 40°C

-15° to 60°C

3,048 m
9,144 m

Hardware Reference Guide A-1

Compaq Professional Workstation AP550

Component U.S. Metric

Minitower Dimensions

Height
Width
Depth

Desktop Dimensions

Height
Width
Depth

Approximate Weight 26 lb 12 kg

Power Supply

Operating Voltage Range
Rated Voltage Range
Rated Line Frequency

Temperature

Operating
Shipping

Humidity (noncondensing)

Operating
Nonoperating

Maximum Altitude (unpressurized)

Operating
Nonoperating

Power Output 375 W

Rated Input Current (maximum) 8 A 4 A

Heat Dissipation (maximum) 2200 Btu/hr 560 kg-cal/hr

17.65 in.

6.60 in.

17.36 in.

6.60 in.

17.65 in.

17.11 in.

115 VAC

90-132 VAC
100-127 VAC
50-60 Hz

50° to 95°F
4° to 140°F

20% to 80%
10% to 90%

10,000 ft
30,000 ft

44.83 cm

16.76 cm

44.09 cm

16.76 cm

44.83 cm

43.46 cm

230 VAC

180-264 VAC
200-250 VAC
50-60 Hz

10° to 35°C

-15° to 60°C

3,048 m
9,144 m

A-2 Specifications

Compaq Deskpro Workstation AP250

Component U.S. Metric

Minitower Dimensions

Height
Width
Depth

Desktop Dimensions

Height
Width
Depth

Approximate Weight 26 lb 12 kg

Power Supply

Operating Voltage Range
Rated Voltage Range
Rated Line Frequency

Temperature

Operating
Shipping

Humidity (noncondensing)

Operating
Nonoperating

Maximum Altitude (unpressurized)

Operating
Nonoperating

Power Output 200 W

Rated Input Current (maximum)

200 W 5.5 A 3 A

Heat Dissipation (maximum)

200 W 1050 Btu/hr 265 kg-cal/hr

17.65 in.

6.60 in.

17.11 in.

6.60 in.

17.65 in.

17.11 in.

115 VAC

90-132 VAC
100-127 VAC
50-60 Hz

50° to 95°F
4° to 140°F

20% to 80%
10% to 90%

10,000 ft
30,000 ft

44.83 cm

16.76 cm

43.46 cm

16.76 cm

44.83 cm

43.46 cm

230 VAC

180-264 VAC
200-250 VAC
50-60 Hz

10° to 35°C

-15° to 60°C

3,048 m
9,144 m

Hardware Reference Guide A-3

appendix B

OMPUTER SETUP

C

Computer Setup Utilities (F10)

Use Computer Setup to do the following:

■ Change factory default settings.

■ Set the system date and time.

■ Set, view, change, or verify the system configuration, including

settings for processor, graphics, memory, audio, storage,
communications, and input devices.

■ Modify the boot order of bootable devices such as hard drives,

diskette drives, CD-ROM drives, DVD-ROM drives, or LS-120
drives.

■ Configure the boot priority of UATA and SCSI hard drives

controllers.

■ Configure Quiet Drive options (for drives that support this

feature).

■ Enable Quick Boot, which is faster than Full Boot but does not run

all of the diagnostic tests run during a Full Boot. You can set your
system to:

❏ always Quick Boot (default);
❏ periodically Full Boot (from every 1 to 30 days); or
❏ always Full Boot.

■ Enable or disable Network Server Mode, which allows the

computer to boot the operating system when the power-on
password is enabled, with or without a keyboard or mouse
attached. When attached to the system, the keyboard and mouse
remain locked until the power-on password is entered.

■ Select Post Messages Enabled or Disabled to change the display

status of Power-On Self-Test (POST) messages. Post Messages
Disabled suppresses most POST messages, such as memory count,
product name, and other non-error text messages. If a POST error
occurs, the error is displayed regardless of the mode selected. To
manually switch to Post Messages Enabled during POST, press
any key (except F10 or F12).

Hardware Reference Guide B-1

■ Establish an Ownership Tag, the text of which is displayed each

time the system is turned on or restarted.

■ Enter the Asset Tag or property identification number assigned by

your company to this computer.

■ Enable power-on password prompting during system restarts

(warm boots) as well as during power-on.

■ Establish a setup password that controls access to Computer Setup

(F10) and the settings described in this section.

■ To secure integrated I/O functionality, including the serial, USB,

or parallel ports, audio, or embedded NIC, so that they cannot be
used until they are unsecured.

■ Enable or disable Master Boot Record (MBR) Security. This

feature is not supported on the Compaq Professional Workstation
AP550 or SP750.

■ Enable or disable removable media boot ability.

■ Enable or disable removable media write ability.

■ Solve system configuration errors detected but not automatically

fixed during the Power-On Self-Test (POST).

■ Replicate your system setup by saving system configuration

information on diskette and restoring it on one or more computers.

B-2 Computer Setup

■ Execute self-tests on a specified IDE hard drive.

■ Configure various energy-saving features including energy saver

mode, system and hard drive timeouts, power button mode, and
power LED behavior.

Using Computer Setup Utilities

To access the Computer Setup Utilities menu, complete the following
steps:

1. Turn on or restart the computer. If you are in Windows, click
Start ! Shut Down ! Restart the Computer.

2. When the F10=Setup message appears in the lower-right corner of
the screen, press the F10 key.

If you do not press the F10 key while the message is

✎

displayed, you must restart the computer again to
access the utility.

3. Select your language from the list and press the Enter key.

4. A choice of five headings appears in the Computer Setup Utilities
menu: File, Storage, Security, Power, and Advanced.

5. Using the arrow keys or the Tab key, select the option you want
and press the Enter key. To return to the Computer Setup Utilities
menu, press the Esc key.

6. To apply and save changes, select File ! Save Changes and Exit.

❏ If you selected an option that automatically restarted the

computer, changes were applied at that time.

❏ If you have made changes that you do not want applied, select

Ignore Changes and Exit.

❏ If you have already applied changes you now want to

eliminate, select Set Defaults and Exit. This option will restore
the original factory system defaults.

Hardware Reference Guide B-3

Computer Setup

Heading Option Description

File System Information Lists:

• product name

• processor type/speed/stepping

• cache size (L1/L2)

• installed memory size

• system ROM (includes family name and

version)

• system board revision

• chassis serial number

• asset tracking number

• integrated MAC for embedded, enabled NIC (if

applicable)

About Displays copyright notice.

Set Time and Date Allows you to set system time and date.

Save to Diskette Saves system configuration, including CMOS, to a

blank, formatted 1.44-MB diskette.

Restore from Diskette Restores system configuration, including CMOS,

from a diskette.

Set Defaults and Exit Restores factory default settings, which includes

clearing any established passwords.

Ignore Changes and Exit Exits Computer Setup without applying or saving any

changes.

Save Changes and Exit Saves changes to system configuration and exits

Computer Setup.

Support for Computer Setup options may vary depending on your specific hardware configuration.

Continued

B-4 Computer Setup

Computer Setup Continued

Heading Option Description

Storage Device Configuration Lists all installed storage devices. The following

options appear when a device is selected:

Diskette Type (For legacy diskette drives only)
Identifies the highest capacity media type accepted
by the diskette drive. Options are 3.5" 1.44 MB, 3.5"
720 KB, 5.25" 1.2 MB, 5.25" 360 KB, and Not
Installed.

Drive Emulation (IDE devices only)
Allows you to select a drive emulation type for a
storage device. (For example, a Zip drive can be
made bootable by selecting disk emulation.)

Drive Type Emulation Options

Hard disk No emulation options available.

Diskette None (treated as diskette drive)

Disk (treated as hard drive)

CD-ROM None (treated as CD-ROM drive)

Diskette (treated as diskette drive)

Disk (treated as hard drive)

Other (e.g.,
Zip drive)

Transfer Mode (IDE devices only)
Specifies the active data transfer mode. Options
(subject to device capabilities) are PIO 0, Max PIO,
Enhanced DMA, Ultra DMA 0, and Max UDMA.

Support for Computer Setup options may vary depending on your specific hardware configuration.

None (treated as Other)

CD-ROM (treated as CD-ROM drive)

Diskette (treated as diskette drive)

Disk (treated as hard drive)

Continued

Hardware Reference Guide B-5

Computer Setup Continued

Heading Option Description

Storage

(continued)

Support for Computer Setup options may vary depending on your specific hardware configuration.

Device Configuration

(continued)

Translation Mode (IDE disks only)
Lets you select the translation mode to be used for
the device. This enables the BIOS to access disks
partitioned and formatted on other systems and may
be necessary for users of older versions of Unix
(e.g., SCO Unix version 3.2). Options are Bit-Shift,
LBA Assisted, User, and None.

CAUTION: Ordinarily, the translation mode selected
automatically by the BIOS should not be changed. If the
selected translation mode is not compatible with the
translation mode that was active when the disk was
partitioned and formatted, the data on the disk will be
inaccessible.

Translation Parameters (IDE Disks only)
Allows you to specify the parameters (logical
cylinders, heads, and sectors per track) used by the
BIOS to translate disk I/O requests (from the
operating system or an application) into terms the
hard drive can accept. Logical cylinders may not
exceed 1024. The number of heads may not exceed

256. The number of sectors per track may not
exceed 63. These fields are only visible and
changeable when the drive translation mode is set to
User.

Multisector Transfers (IDE ATA devices only)
Specifies how many sectors are transferred per multi­sector PIO operation. Options (subject to device
capabilities) are Disabled, 8, and 16.

Quiet Drive (available on select drives only)

• Performance

Allows the drive to operate at maximum
performance.

• Quiet

Reduces noise from the drive during operation.
When set to Quiet, the drive will not operate at
maximum performance.

If the drive does not support Quiet mode, the Quiet
Drive option will not be displayed.

Continued

B-6 Computer Setup

Computer Setup Continued

Heading Option Description

Storage

(continued)

Support for Computer Setup options may vary depending on your specific hardware configuration.

Options Removable Media Boot

Enables/disables ability to boot the system from
removable media.

Note: After saving changes to Removable Media
Boot, the computer will restart. Turn the computer off,
then on, manually.

Removable Media Write

Enables/disables ability to write data to removable
media.

Note: This feature applies only to legacy diskette,
IDE LS-120 Superdisk, and IDE PD-CD drives.

Primary IDE Controller

Allows you to enable or disable the primary IDE
controller.

Secondary IDE Controller

Allows you to enable or disable the secondary IDE
controller.

Diskette MBR Validation

Allows you to enable or disable strict validation of the
diskette Master Boot Record (MBR).

Note: If you use a bootable diskette image that you
know to be valid, and it does not boot with Diskette
MBR Validation enabled, you may need to disable
this option in order to use the diskette.

Continued

Hardware Reference Guide B-7

Computer Setup Continued

Heading Option Description

Storage

(continued)

Support for Computer Setup options may vary depending on your specific hardware configuration.

DPS Self-Test Allows you to execute self-tests on IDE hard drives

capable of performing the Drive Protection System
(DPS) self-tests.

Note: This selection will only appear when at least
one drive capable of performing the IDE DPS self­tests is attached to the system

Hard Drive Order

(supported on select
models only)

SCSI Narrow Termination

(supported on select
models only)

Boot Order Allows you to specify the order in which attached

Allows you to specify the order of attached hard drive
controllers. The first hard drive controller in the order
will have priority in the boot sequence and will be
recognized as drive C (if any devices are attached).

Allows you to configure SCSI termination on the
internal SCSI subsystem for older, narrow SCSI
devices only. This feature is disabled by default
which allows connection to wide SCSI devices.

peripheral devices (such as diskette drive, hard drive,
CD-ROM, or network interface card) are checked for
a bootable operating system image. Each device on
the list may be individually excluded from or included
for consideration as a bootable operating system
source. For systems with more than one attached
diskette or disk drive, a submenu allows you to
specify the order in which the devices are assigned
drive letters.

Note: MS-DOS drive lettering assignments may not
apply after a non-MS-DOS operating system has
started.

To boot one time from a device other than the
default device specified in Boot Order, restart the
computer and press F9 when the F10=Setup
message appears on the screen. When POST is
completed, a list of bootable devices is displayed.
Use the arrow keys to select a device and press the
Enter key.

Continued

B-8 Computer Setup

Computer Setup Continued

Heading Option Description

Security Setup Password Allows you to set and enable setup (administrator)

password.
Note: If the setup password is set, it is required to
change Computer Setup options, flash the ROM, and
make changes to certain plug and play settings
under Windows. Also, this password must be set in
order to use some Compaq remote security tools.

See the Troubleshooting Guide for more information.

Power-On Password Allows you to set and enable power-on password.

See the Troubleshooting Guide for more information.

Password Options Allows you to

• enable/disable network server mode.

Note: This selection will appear only if a power­on password is set.

• specify whether password is required for warm

boot (CTRL+ALT+DEL).
Note: This selection is available only when
Network Server Mode is disabled.

See the Desktop Management Guide for more
information.

Smart Cover Allows you to

• enable/disable the Smart Cover Lock

• enable/disable Smart Cover Sensor.

Notify User alerts the user that the sensor has
detected that the cover has been removed.
Setup Password requires that the setup
password be entered to boot the computer if the
sensor detects that the cover has been
removed.

Feature supported on select models only. See the
Desktop Management Guide for more information.

Support for Computer Setup options may vary depending on your specific hardware configuration.

Continued

Hardware Reference Guide B-9

Computer Setup Continued

Heading Option Description

Security

(continued)

Support for Computer Setup options may vary depending on your specific hardware configuration.

Master Boot Record
Security

Save Master Boot Record Saves a backup copy of the Master Boot Record of

Restore Master Boot
Record

Allows you to enable or disable Master Boot Record
(MBR) Security.

When enabled, the BIOS rejects all requests to write
to the MBR on the current bootable disk. Each time
the computer is powered on or rebooted, the BIOS
compares the MBR of the current bootable disk to the
previously-saved MBR. If changes are detected, you
are given the option of saving the MBR on the current
bootable disk, restoring the previously-saved MBR,
or disabling MBR Security. You must know the setup
password, if one is set.

Note: Disable MBR Security before intentionally
changing the formatting or partitioning of the current
bootable disk. Several disk utilities (such as FDISK
and FORMAT) attempt to update the MBR. If MBR
Security is enabled and disk accesses are being
serviced by the BIOS, write requests to the MBR are
rejected, causing the utilities to report errors. If MBR
Security is enabled and disk accesses are being
serviced by the operating system, any MBR change
will be detected by the BIOS during the next reboot,
and an MBR Security warning message will be
displayed.

Feature supported on select models only.

the current bootable disk.

Note: Only appears if MBR Security is enabled.

Restores the backup Master Boot Record to the
current bootable disk.

Note: Only appears if all of the following conditions
are true:

• MBR Security is enabled

• A backup copy of the MBR has been previously

saved

• The current bootable disk is the same disk from

which the backup copy of the MBR was saved

Continued

B-10 Computer Setup

Computer Setup Continued

Heading Option Description

Security

(continued)

Support for Computer Setup options may vary depending on your specific hardware configuration.

Device Security Enables/disables serial, parallel, and USB ports and

audio security.

Network Service Boot Enables/disables the computers ability to boot from

an operating system installed on a network server.
(Feature available on NIC models only; the network
controller must reside on the PCI bus or be
embedded on the system board.)

System IDs Allows you to set:

• asset tag (16-byte identifier) and ownership Tag

(80-byte identifier displayed during POST)
See the Desktop Management guide for more
information

• chassis serial number or Universal Unique

Identifier (UUID) number if current number is
invalid (these ID numbers are normally set in the
factory and are used to uniquely identify the
system)

• keyboard locale setting (e.g., English or

German) for System ID entry

Continued

Hardware Reference Guide B-11

Computer Setup Continued

Heading Option Description

Power Energy Saver Allows you to set the energy saver mode (advanced,

disable, or minimal).

Note: In the minimal energy saver mode setting, the
hard drive and system do not go into energy saver
mode, but the setting allows you to press the power
button to suspend the system.

This option is not available under ACPI-enabled
operating systems.

Timeouts Allows you to disable or manually select timeout

values for the system and/or all attached IDE hard
drives.

Note: This option is not available under ACPI­enabled operating systems. This selection will only
appear when energy saver mode is set to advanced.

Energy Saver Options Allows you to set:

• power button configuration (on/off or

sleep/wake) under APM-enabled operating
systems

• power LED blink in suspend mode

(enable/disable). This option is not available
under ACPI-enabled operating systems.

Note: Energy Saver Options will not appear if the
energy saver mode is disabled.

Support for Computer Setup options may vary depending on your specific hardware configuration.

Continued

B-12 Computer Setup

Computer Setup Continued

Heading Option Description

Advanced* Power-On Options Allows you to set:

• POST mode (QuickBoot, FullBoot, or FullBoot

every 1-30 days)

• POST messages (enable/disable)

• Safe POST (enable/disable)

• F10 prompt (enable/disable)

• F12 prompt (enable/disable)

• Option ROM prompt (enable/disable)

• Remote wakeup boot sequence (remote

server/local hard drive)

• After power loss (off/on)

If you connect your computer to an electric
power strip, and would like to turn on power to
the computer using the switch on the power
strip, set this option to on.

Note: If you turn off power to your computer using

the switch on a power strip, you will not be able
to use the suspend/sleep feature or the Remote
Management features.

• UUID (Universal Unique Identifier)

(enable/disable)

Onboard Devices Allows you to set resources for or disable onboard

system devices (diskette controller, serial port,
parallel port).

PCI Devices • Lists currently installed PCI devices and their

IRQ settings.

• Allows you to reconfigure IRQ settings for these

devices or to disable them entirely.

Support for Computer Setup options may vary depending on your specific hardware configuration.

* These options should be used by advanced users only.

continued

Hardware Reference Guide B-13

Computer Setup Continued

Heading Option Description

Advanced*

(continued)

Bus Options Allows you to enable or disable:

• PCI bus mastering, which allows a PCI device to

take control of the PCI bus

• PCI VGA palette snooping, which sets the VGA

palette snooping bit in PCI configuration space;
this is only needed with more than one graphics
controller installed

• PCI SERR# Generation.

Device Options Allows you to set:

• Printer mode (bi-directional, EPP & ECP, output

only)

• Num Lock state at power-on (off/on)

• PME (power management event) wakeup

events (enable/disable)

• Processor cache (enable/disable)

• Processor Number (enable/disable) for Pentium

III processors.

• ACPI Thermal model (enable/disable)

• ACPI S3 support (enable/disable). S3 is an

ACPI (advanced configuration and power
interface) sleep state that some add-in hardware
options may not support. Feature supported on
select models only.

• AGP Aperture size (options vary depending on

platform) allows you to specify the amount of
system memory reserved for use by your
graphics controller.

PCI VGA Configuration Appears only if there are multiple PCI video adapters

in the system. Allows users to specify which VGA
controller will be the boot or primary VGA controller.

Support for Computer Setup options may vary depending on your specific hardware configuration.

* These options should be used by advanced users only.

B-14 Computer Setup

appendix C

ARD DRIVE INSTALLATION

H

UIDELINES

G

Using the Cable-Select Feature with Ultra ATA Devices

Select models of the Compaq Deskpro Workstation AP250 have an
internal IDE Ultra ATA hard drive preinstalled. The configuration of
the drives employs a cable-select feature that identifies the drives as
device 0 (primary drive) or device 1 (secondary drive).

The system board determines which drive is device 0 or device 1,
based on the way the drives are connected to the special drive cable.
The device 0 drive is the drive connected to the short segment of the
drive cable (or the connector closest to the system board); the device 1
drive is the drive connected to the long segment of the drive cable.

Compaq hard drives ship with jumpers preset to cable-select mode;
therefore, no jumper setting changes on the existing or optional drives
are required. If you purchase a third party hard drive, refer to the
documentation included with the kit to ensure proper installation and
configuration of cables.

✎

If installing a second device on the primary controller, you
must use an 80 conductor Ultra ATA cable for optimal
performance. This cable is standard on select models.

Guidelines for Installing Ultra ATA (IDE) Devices

When installing additional IDE drives, follow these guidelines:

■ For optimal performance, connect hard drives to the primary

controller. Connect expansion devices, such as IDE CD-ROM
drives, tape drives, and diskette drives, to the secondary controller.

■ Install either a third-height or a half-height drive into a half-height

bay.

■ Install guide screws to ensure that the drive lines up correctly in

the drive cage. Compaq has provided extra guide screws, which
are installed in the front of the workstation chassis behind the front
bezel. Some options use M3 metric hardware. Compaq-supplied
metric screws are black.

Hardware Reference Guide C-1

SCSI Devices and Guidelines

Guidelines for SCSI Devices

When installing and operating SCSI devices, you must follow these
guidelines:

■ A single Ultra SCSI, Ultra-Wide SCSI, Wide-Ultra SCSI, Wide

Ultra2 SCSI or Ultra3 SCSI, controller allows you to daisy-chain
up to 15 additional SCSI devices. Counting the controller, that
amounts to 16 total SCSI devices.

■ If two SCSI controllers are each connected to separate system

board SCSI connectors, each controller may have seven SCSI
devices attached. This will give a total of 16 SCSI devices on the
system.

■ The SCSI controller requires a unique SCSI ID (0-7 or 8-15) for

each SCSI device installed. The controller identifies a SCSI device
by its SCSI ID number rather than its location. Moving a SCSI
device from one position to another on the SCSI chain does not
affect communication between the controller and the device. The
reserved and availagle SCSI ID numbers for SCSI devices are:

❏ 0 is reserved for the primary hard drive.
❏ 7 is reserved for the controller.

C-2 Hard Drive Installation Guidelines

❏ 1 through 6 and 8 through 15 are available for all other SCSI

devices.

■ If only one SCSI hard drive is used, it should be installed in the

lowest numbered bay (bay 1).

■ On a Compaq Professional Workstation SP750, Bay 4 is reserved

for the CD-ROM or DVD-ROM drive. Do not install a SCSI
device in this bay.

■ Every SCSI chain or circuit must be terminated (closed) at both

ends. Some system boards have both ends of the SCSI cable
connected to, and terminated by, the system board. Termination
can be accomplished in one of several ways:

❏ Use a cable with a built-in terminator.
❏ Use a cable with a terminating resistor plug in the last

connector.

❏ Connect a SCSI device with its termination enabled into the

last connector.

❏ Connect an external SCSI device with its termination enabled

to the external SCSI connector on the rear panel of the
computer.

■ Turn on all external SCSI devices before turning on the power to

the computer. This enables the SCSI controller to recognize the
external devices.

■ All SCSI hard drives must be either internal or external, but never

both. The system accommodates a combination of other internal
and external SCSI devices, such as tape and CD-ROM drives.

■ Compaq does not recommend mixing different width SCSI devices

on the same SCSI chain or on the same SCSI controller. Mixing
devices of different widths on the same chain or controller will
always result in a data transfer rate of the slowest machine in that
chain. It is acceptable to mix Wide-Ultra2 and Ultra3 SCSI
devices, but do not mix Narrow devices with any devices other
than Narrow devices.

For additional information about optional SCSI devices, refer to the
documentation included with the device or contact your Compaq
authorized dealer, reseller, or service provider.

CAUTION: Do not route cables near the air intake to the power
supply. Cables routed in this manner can block airflow to the power
supply, causing it to overheat.

Guidelines for Installing a SCSI Device

Compaq does not support mixing Ultra ATA and SCSI hard drives in
the same system.

On a Compaq Deskpro Workstation AP250, if you are replacing a hard
drive in bays 4 or 5, the replacement drive should be of the same type
as the drive being removed. If you are replacing the Ultra ATA hard
drive with a SCSI hard drive, you will need a SCSI device option kit
and the SCSI controller option kit. The controller option kit contains
the SCSI controller and a cable that supports multiple SCSI devices.

Before installing a SCSI device on any workstation:

■ Verify the SCSI ID of the drive and, if necessary, set the SCSI ID

to a unique number. See  Guidelines for SCSI Devices in this
appendix or refer to the documentation included with the device.

■ Determine if the device requires termination to be enabled or

disabled. Set the termination if necessary. See the section Using a
SCSI Cable or refer to the documentation included with the
device.

Hardware Reference Guide C-3

SCSI Controllers

SCSI Cables

Your workstation ships with one of the following SCSI controllers:

■ PCI SCSI controller (on select models of the Compaq Deskpro

Workstation AP250)

■ An integrated Ultra3 SCSI controller that has one internal

connector on the system board and one external connector on the
rear panel (Compaq Professional Workstation AP550)

■ An integrated Dual Ultra3 SCSI controller with two independent

channels, Channel 1 and Channel 2. Channel 1 has one internal
SCSI connector on the system board. Channel 2 has two
connectors, one internal SCSI connector on the system board and
one external SCSI connector on the rear panel of the workstation.
(Compaq Professional Workstation SP750)

Depending on your workstation model, the following three areas are
available for installing or connecting mass storage SCSI devices:

■ Removable hard drive cage (Compaq Professional Workstation

SP750 only)

■ Front drive bays

Using a SCSI Cable

C-4 Hard Drive Installation Guidelines

The Compaq Professional Workstation SP750 ships with a Low
Voltage Differential (LVD) SCSI cable that supports up to five SCSI
devices: a maximum of three in the removable hard drive cage and two
in the front drive bay area.

The Compaq Professional Workstation AP550 ships with a multi-mode
SCSI cable that supports LVD or single-ended devices. The cable
accommodates up to three SCSI devices in the front drive bay area.

The Compaq Deskpro Workstation AP250 also ships with a multi­mode SCSI cable that supports LVD or single-ended devices. The
cable accommodates up to three SCSI devices in the front drive bay
area. Some Compaq Deskpro Workstation AP250 models ship with an
internal SCSI drive preinstalled in the front drive bay area. You can
add additional high-performance SCSI drives using the external SCSI
connnector located on the rear panel of the workstation.

Five-device SCSI cable with terminator

The cable that shipped with your workstation may look different than
the one illustrated (a five-device cable).

✎

For additional information about installing optional SCSI devices, refer
to the documentation included with the device option kit or contact
your Compaq authorized dealer, reseller, or service provider.

If installing a narrow SCSI device, you will need to attach a
68-pin to 50-pin SCSI adapter.

Using SCSISelect with SCSI Devices

The Wide Ultra2 SCSI host adapter includes the SCSI
configure the host adapter and to run SCSI disk utilities. To run the
SCSI

■ In Post Messages Enabled mode: Press Ctrl+A when the Press

■ In Post Messages Disabled mode: When the Compaq logo screen

A menu appears with the following options:

utility:

Select

<Ctrl><A> for SCSISelect Utility message appears during POST.

appears, press any key to exit the logo screen. Immediately after
exiting the logo screen, press Ctrl+A to access the SCSI
utility.

Select

utility to

Select

■ Configure/View Host Adapter Settings
❏ SCSI Bus Interface Definitions

Host Adapter SCSI ID



SCSI Parity Checking



Host Adapter SCSI Termination



Hardware Reference Guide C-5

❏ Additional Options

Boot Device Options



SCSI Device Configuration



Advanced Configuration Options



■ SCSI Disk Utilities

Lists all SCSI devices and SCSI ID numbers

✎

For information about configuring POST message display
status, refer to Appendix B, Computer Setup.

C-6 Hard Drive Installation Guidelines

appendix D

ATTERY REPLACEMENT

B

The battery that comes with your computer provides power to the real­time clock and has a lifetime of about five years. When replacing the
battery, use an equivalent 3-volt lithium coin cell battery.

WARNING: Your computer contains an internal lithium
manganese dioxide, vanadium pentoxide, or alkaline battery or
battery pack. There is a risk of fire and burns if the battery pack
is not handled properly. To reduce the risk of personal injury:

Do not attempt to recharge the battery.

Do not expose to temperatures higher than 60°C (140ºF).

Do not disassemble, crush, puncture, short external contacts, or
dispose of in fire or water.

Replace only with the Compaq spare designated for this product.

Batteries, battery packs, and accumulators should not be
disposed of together with the general household waste. In order
to forward them to recycling or proper disposal, please use the
public collection system or return them to Compaq, your
authorized partners, or their agents.

1. Shut down the operating system properly, turn off the computer
and any external devices, disconnect the power cord from the
electrical outlet, and remove the computer cover or access panel.

✎

It may be necessary to remove an expansion card to gain
access to the battery.

Hardware Reference Guide D-1

2. Locate the battery and battery holder on the system board, as
shown in the following illustration.

Battery and Battery Holder

3. Lift the battery out of its holder.

D-2 Battery Replacement

Removing the Coin Cell Battery

4. Slide the replacement battery into position, positive side up.

The battery holder automatically secures the battery in the proper

position.

5. Replace any expansion boards you removed.

6. Replace the computer cover or access panel.

7. Plug in the computer and turn on power to the computer.

8. Reset the date and time, your passwords, and any special system
setups, using Compaq Computer Setup. Refer to Appendix B,
 Computer Setup.

Hardware Reference Guide D-3

Installing a Cable Lock

appendix E

ECURITY LOCK PROVISIONS

S

The cable lock is an optional device used to help secure the
workstation.

1. Separate the pieces of the security bracket by bending the metal
where the three pieces join.

Separating the security brackets

Hardware Reference Guide E-1

2. Insert the tang (tongue) of the narrow bracket (Bracket A) into the
slot on the chassis and slide the U-shaped backet (Bracket B)
between it and the system unit cover; then install the self-tapping
screw included in the cable lock it.

✎

Due to differences between chassis, the slot may be located in
a different position than shown.

Installing brackets A and B

E-2 Security Lock Provisions

3. Cover the screw with the flat bracket (Bracket C).

4. Install a lock (not provided) in the security bracket to control
access to the inside of the workstation. Install a cable lock (not
provided) to secure the workstation to a fixed object.

Securing the workstation with a padlock

Hardware Reference Guide E-3

appendix F

LECTROSTATIC DISCHARGE

E

A discharge of static electricity from a finger or other conductor may
damage system boards or other static-sensitive devices. This type of
damage may reduce the life expectancy of the device.

Preventing Electrostatic Damage

To prevent electrostatic damage, observe the following precautions:

■ Avoid hand contact by transporting and storing products in static-

safe containers.

■ Keep electrostatic-sensitive parts in their containers until they

arrive at static-free workstations.

■ Place parts on a grounded surface before removing them from their

containers.

■ Avoid touching pins, leads, or circuitry.

■ Always be properly grounded when touching a static-sensitive

component or assembly.

Hardware Reference Guide F-1

Grounding Methods

There are several methods for grounding. Use one or more of the
following methods when handling or installing electrostatic-sensitive
parts:

■ Use a wrist strap connected by a ground cord to a grounded

workstation or computer chassis. Wrist straps are flexible straps
with a minimum of 1 Mohm +/- 10 percent resistance in the
ground cords. To provide proper ground, wear the strap snug
against the skin.

■ Use heelstraps, toestraps, or bootstraps at standing workstations.

Wear the straps on both feet when standing on conductive floors or
dissipating floor mats.

■ Use conductive field service tools.

■ Use a portable field service kit with a folding static-dissipating

work mat.

If you do not have any of the suggested equipment for proper
grounding, contact your Compaq authorized dealer, reseller, or service
provider.

✎

For more information on static electricity, contact your
Compaq authorized dealer, reseller, or service provider.

F-2 Electrostatic Discharge

Routine Computer Care

appendix G

OUTINE COMPUTER CARE AND

R

HIPPING PREPARATION

S

Follow these suggestions to take care of your computer and monitor:

■ Operate the computer on a sturdy, level surface. Leave a 3-inch

(7.6-cm) clearance at the back of the system unit and above the
monitor to permit the required airflow.

■ Never operate the computer with the cover or side panel removed.

■ Never restrict the airflow into the computer by blocking the front

vents or air intake. Do not place the keyboard, with the keyboard
feet down, directly against the front of the unit that is in a desktop
configuration as this also restricts airflow.

■ Never use a desktop computer on its side (resembling a  tower

configuration) unless it is a computer that has the convertible
minitower (CMT) chassis.

■ Keep the computer away from excessive moisture, direct sunlight,

and extremes of heat and cold. For information about the
recommended temperature and humidity ranges for your computer,
refer to Appendix A,  Specifications, in this guide.

■ Keep liquids away from the computer and keyboard.

■ Never cover the ventilation slots on the monitor with any type of

material.

Hardware Reference Guide G-1

■ Turn off the computer before you do either of the following:

CD-ROM Drive Precautions

Be sure to observe the following guidelines while operating or cleaning
your CD-ROM drive.

Operation

■ Do not move the drive during operation. This may cause it to

■ Avoid exposing the drive to sudden changes in temperature, as

❏ Wipe the exterior of the computer with a soft, damp cloth as

needed. Using cleaning products may discolor or damage the
finish.

❏ Occasionally clean the air vents on the front and back of the

computer. Lint and other foreign matter can block the vents
and limit the airflow.

malfunction during reading.

condensation may form inside the unit. If the temperature suddenly
changes while the drive is on, wait at least one hour before you
turn off the power. If you operate the unit immediately, it may
malfunction while reading.

■ Avoid placing the drive in a location that is subject to high

Cleaning

■ Clean the panel and controls with a soft, dry cloth or a soft cloth

■ Avoid using any type of solvent, such as alcohol or benzene,

Safety

If any object or liquid falls into the drive, immediately unplug the
computer and have it checked by an authorized Compaq service
provider.

G-2 Routine Computer Care and Shipping Preparation

humidity, extreme temperatures, mechanical vibration, or direct
sunlight.

lightly moistened with a mild detergent solution. Never spray
cleaning fluids directly on the unit.

which may damage the finish.

Shipping Preparation

Follow these suggestions when preparing to ship your computer:

1. Back up the hard drive files onto PD discs, tape cartridges, or
diskettes. Be sure that the backup media is not exposed to
electrical or magnetic impulses while stored or in transit.

✎

2. Remove and store any program diskettes from the diskette drives.

3. Insert a blank diskette into the diskette drive to protect the drive

4. Turn off the computer and external devices.

5. Disconnect the power cord from the electrical outlet, then from the

6. Disconnect the system components and external devices from their

✎

7. Pack the system components and external devices in their original

✎

The hard drive locks automatically when the system power is
turned off.

while in transit. Do not use a diskette on which you have stored or
plan to store data.

computer.

power sources, then from the computer.

Ensure that all boards are seated properly and secured in the
board slots before shipping the computer.

packing boxes or similar packaging with sufficient packing
material to protect them.

For environmental nonoperating ranges, refer to Appendix A,
 Specifications, in this guide.

Hardware Reference Guide G-3

A

AGP graphics controller

connector, 1-3
expansion slot, 2-29
expansion slot, 1-4
installing, 2-29

removing, 2-30
Alert on LAN connector, 1-4
audio line-in, 1-3
audio line-out, 1-3

B

back processor cage fan connector,

1-4
battery, location, 1-4
buttons, power, 1-2

C

CD connector, 1-4
CD-ROM drive, 1-2
Chassis fan connector, 1-4
components

front panel, 1-2
hot surfaces, 2-2
installation precautions, 2-2
installation sequence, 2-2
rear panel, 1-3

configuration guidelines

RIMMs, 2-11

connecting the SCSI signal cable,

2-20
connectors

AGP graphics controller, 1-3
alert on LAN, 1-4
audio line-in, 1-3
audio line-out, 1-3
back processor fan, 1-4
CD, 1-4
chassis fan, 1-4
diskette drive, 1-4
headphone, 1-3

NDEX

I

hood sensor, 1-4
IDE Ultra ATA, 1-4
keyboard, 1-3
memory board, 1-4
microphone, 1-3
mouse, 1-3
parallel, 1-3
power, 1-4
power cord, 1-3
power switch and LED, 1-4
processor fan, 1-4
RJ45, 1-3
SCSI, 1-4
SCSI option card and LED, 1-4
serial connector, 1-3
speaker, 1-4
Ultra3 SCSI connector, 1-3
USB connectors, 1-3
wake on LAN, 1-4

cooling shield

location, 2-18
removing, 2-18
replacing, 2-21

CRIMMs (Continuity RIMMs), 2-9

D

diskette drive connector, 1-4
drive bays, 2-14
drives

CD-ROM, 1-2
IDE, 2-14

E

E49 Jumper, 1-4
ECC, 2-5
electric shock, 2-2
Error Checking and Correcting

(ECC) memory. 5AA ECC

Compaq Professional Workstation SP750 Hardware Reference Guide I-1

expansion board

full length board card guide,

2-30

installation, 2-27

expansion slot

AGP location, 1-4
identifying PCI, 2-26

External Ultra3 SCSI, 1-4

L

LAN connector, 1-4
lights

CD-ROM drive, 1-2
hard drive activity, 1-2
network activity, 1-2
power on/off, 1-2

F

fan connector, 1-4
front bezel

removing, 2-4

H

hard drive

bracket, 2-20
removing cage, 2-24
screw holes, 2-23

Hardware Abstraction Layer

(HAL), 2-32
headphone connector, 1-3
heatsink, 2-31
hood sensor connector, 1-4

I

installing

additional drives, 2-14
AGP graphics controller, 2-29
expansion board, 2-27
hard drive in removable hard

drive cage, 2-23
Pentium processor, 2-31
RIMMs, 2-7, 2-10

installing a drive

bays 5 and 6, 2-20

Intel Pentium processor

installing, 2-31

K

M

memory

configuration requirements, 2-5
installing RIMMs, 2-7

maximum, 2-5
memory board connector, 1-4
memory installation guidelines, 2-9
microphone connector, 1-3
mouse connector, 1-3
mouse functions, 1-5

O

option card, 1-4

P

P49 jumper, 1-4
parallel connector, 1-3
password jumper, 1-4
Pentium processor

installing, 2-31
power connectors, 1-4
power cord connector, 1-3
power switch, 1-2, 1-4
power-on password jumper, 1-4
primary IDE Ultra ATA connector,

1-4
primary processor, 2-32
primary processor slot, 1-4
processor, 1-4
processor cage fan connector, 1-4
processor/heatsink assembly, 2-31

I-2 Index

keyboard

using Windows logo keys, 1-5

keyboard connector, 1-3

R

S

rear panel components, 1-3
removable hard drive cage, 2-23
removing

cooling shield, 2-18
workstation access panel, 2-3

removing a drive

bays 5 and 6, 2-22

hard drive cage, 2-17, 2-25
replacing a cooling shield, 2-18
replacing a hard drive cage, 2-17
RIMMs

important guidelines, 2-9

memory configuration, 2-7
RJ45 connector, 1-3

screws

drive bay installations, 2-19
removable media storage

devices, 2-19
SCSI connector, 1-4
SCSI option card, 1-4
secondary IDE Ultra ATA

connector, 1-4
secondary processor slot, 1-4
serial connector, 1-3
serial number, 1-5
speaker, 1-2
speaker connector, 1-4
SW50 Pushbutton Switch, 1-4

U

Ultra3 SCSI connector, 1-3, 1-4
USB connector, 1-3

W

Wake on LAN connector, 1-4
Windows logo keys, 1-5

Compaq Professional Workstation SP750 Hardware Reference Guide I-3