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System Security, 3.16 Keyboard/Mouse Controller, Real-Time Clock and CMOS RAM - bios setup

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1.3.15 System Security The system BIOS provides a power-on password option that is enabled through the Setup program. The computer includes a cable lock provision that makes it possible to lock the computer cover in place to prevent unauthorized access to the system jumpers and other internal components (a padlock is not included). For more information on this and additional security features, refer Chapter 2, "Compaq Utilities." 1.3.16 Keyboard/Mouse Controller The onboard 8042 I/O controller stores the keyboard and mouse controller code. Connectors for the keyboard and mouse are located on the back panel. 1.3.17 Real-Time Clock and CMOS RAM The onboard I/O controller provides a real-time clock and CMOS RAM. Chapters 5 and 6, "Removal and Replacement," provide information about installing a new battery. You can set the time for the clock and the CMOS values by using the Setup program described in Chapter 2, "Compaq Utilities." 1.3.18 Power Supply Fan For cooling, a fan is incorporated as part of the power supply at the rear of the computer chassis. The fan draws air in through the front of the chassis and exhausts air out the rear of the chassis. This provides adequate air flow across the processor. To insure that the processor in a Pentium II minitower system receives adequate ventilation, an internal air duct is installed in the front of the unit. 1.3.19 Speaker An internal piezo speaker is mounted on the system board. The speaker provides audible error code information (beep codes) during the Power-On Self-Test (POST) and as required by the software. See Appendix F, "POST Error Messages," for beep code information. 1.3.20 Software The Pentium computer configurations are shipped with Windows 95 installed as the operating system. The Pentium II configurations ship with Windows NT 4.0 as the operating system. Preloaded Software The following Compaq software is preloaded on the computer: s Partition-based Compaq Diagnostics utilities s Compaq Diagnostics for Windows s Compaq Insight Management Agent s Desktop Management Interface (DMI) Support 1-10 Product Description

Section	Page
NOTICE	3
CONTENTS	5
PRODUCT DESCRIPTION	13
1.1 Compaq Deskpro 2000 Series of Personal Computer Models	14
1.2 Features	15
1.3 System Design	17
1.4 Desktop Computer Features	26
1.5 Minitower Computer Features	29
1.6 Enhanced Keyboard	34
1.7 Options	36
COMPAQ UTILITIES	39
2.1 Getting Ready	39
2.2 Computer Setup	41
2.3 Computer Checkup (TEST)	48
2.4 View System Information (INSPECT)	49
2.5 Create a Diagnostics Diskette	50
2.6 Managing the Diagnostics Partition	50
2.7 Exiting the Compaq Utilities Menu	51
2.8 Compaq Enhanced Insight Personal Edition (Diagnostics for Windows)	51
2.9 Power-On Self-Test (POST)	51
2.10 ROMPaq	52
2.11 Compaq Intelligent Manageability	53
ILLUSTRATED PARTS CATALOG	66
3.1 System Unit	67
3.2 Mass Storage Devices	71
3.3 Cables	73
3.4 Standard and Optional Boards	75
3.5 Keyboards	79
3.6 Monitors	81
3.7 Miscellaneous Hardware Kit	84
3.8 Miscellaneous Plastics Kit	85
3.9 Miscellaneous Parts	87
3.10 Shipping Boxes	89
REMOVAL AND REPLACEMENT PRELIMINARIES	94
4.1 Electrostatic Discharge Information	94
4.2 Routine Care	97
4.3 Service Considerations	99
REMOVAL AND REPLACEMENT PROCEDURES - DESKTOP	101
5.1 Serial Number	101
5.2 Disassembly Sequence Chart	102
5.3 Preparation for Disassembly	103
5.4 Feet	104
5.5 Cable Lock	105
5.6 System Unit Cover	106
5.7 Speaker	107
5.8 Expansion Board	109
5.9 System Board Components	112
5.10 Riser Board	118
5.11 Riser Brace	119
5.12 Expansion Board Guide	120
5.13 Replacement Battery	121
5.14 Front Bezel Assembly	123
5.15 Power Supply Assembly	127
5.16 Mass Storage Devices	130
5.17 Drive Cage	137
5.18 LED Cable	138
5.19 System Board	140
REMOVAL AND REPLACEMENT PROCEDURES - MINITOWER	143
6.1 Serial Number	143
6.2 Disassembly Sequence Chart	144
6.3 Preparation for Disassembly	145
6.4 Feet	145
6.5 Cable Lock	146
6.6 Exposing the Chassis	147
6.7 Riser Brace	149
6.8 Expansion Board	150
6.9 Expansion Board Guide	152
6.10 Riser Board	153
6.11 Speaker	154
6.12 System Board Components	155
6.13 System Board	161
6.14 Replacement Battery	164
6.15 ISA Option Board Retainer	166
6.16 Front Bezel Assembly	167
6.17 Power Supply Assembly	171
6.18 LED Cable	174
6.19 Mass Storage Devices	176
JUMPER AND SWITCH INFORMATION	184
7.1 System Board Switches	185
7.2 System Board Jumpers	189
7.3 Hard Drives	193
7.4 CD-ROM Drive Jumper Settings	201
7.5 Optional PD-CD Drives	201
7.6 Diskette Drive	202
SPECIFICATIONS	203
8.1 System	203
8.2 Drives	209
8.3 Audio System	216
8.4 Keyboard	216
8.5 Mouse	217
8.6 Supported Graphics Resolutions	217
CONNECTOR PIN ASSIGNMENTS	219
POWER CORD SET REQUIREMENTS	225
HARD DRIVES	227
DIAGNOSTIC ERROR CODES	232
POST ERROR MESSAGES	243
TROUBLESHOOTING WITHOUT DIAGNOSTICS	246
INTEL 440LX CHIPSET MEMORY LIMITATIONS	258

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1-10

Product Description

1.3.15 System Security

The system BIOS provides a power-on password option that is enabled through the Setup program.

The computer includes a cable lock provision that makes it possible to lock the computer cover in

place to prevent unauthorized access to the system jumpers and other internal components (a padlock

is not included). For more information on this and additional security features, refer Chapter 2,

“Compaq Utilities.”

1.3.16 Keyboard/Mouse Controller

The onboard 8042 I/O controller stores the keyboard and mouse controller code. Connectors for the

keyboard and mouse are located on the back panel.

1.3.17

Real-Time Clock and CMOS RAM

The onboard I/O controller provides a real-time clock and CMOS RAM. Chapters 5 and 6, “Removal

and Replacement,” provide information about installing a new battery.

You can set the time for the clock and the CMOS values by using the Setup program described in

Chapter 2, “Compaq Utilities.”

1.3.18 Power Supply Fan

For cooling, a fan is incorporated as part of the power supply at the rear of the computer chassis. The

fan draws air in through the front of the chassis and exhausts air out the rear of the chassis. This

provides adequate air flow across the processor.

To insure that the processor in a Pentium II minitower system receives adequate ventilation, an

internal air duct is installed in the front of the unit.

1.3.19 Speaker

An internal piezo speaker is mounted on the system board. The speaker provides audible error code

information (beep codes) during the Power-On Self-Test (POST) and as required by the software. See

Appendix F, “POST Error Messages,” for beep code information.

1.3.20 Software

The Pentium computer configurations are shipped with Windows 95 installed as the operating

system. The Pentium II configurations ship with Windows NT 4.0 as the operating system.

Preloaded Software

The following Compaq software is preloaded on the computer:

■

Partition-based Compaq Diagnostics utilities

■

Compaq Diagnostics for Windows

■

Compaq Insight Management Agent

■

Desktop Management Interface (DMI) Support