HP dx5150 Technical Information Page 36
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3–10 361685-001 Service Reference Guide, dx5150
Desktop Management
The following table and sections refer to managing security features of your computer locally
through the Computer Setup Utilities (F10).
Security Features Overview
Option Description
Supervisor
Password
Allows you to set and enable Supervisor (administrator) password.
✎
If the Supervisor 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.
See the Troubleshooting Guide on the Documentation CD for more information.
User
Password
Allows you to set and enable a User password.
✎
If the User password is set, it is required to access the computer when power is
turned on.
See the Troubleshooting Guide on the Documentation CD for more information.
Device
Security
Enables/disables serial ports, parallel port, front USB ports, system audio, and
network controllers (some models).
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 (18-byte identifier) and ownership Tag (80-byte identifier
displayed during POST).
• Chassis serial number or Universal Unique Identifier (UUID) number. The
UUID can only be updated if the current chassis serial number is invalid.
(These ID numbers are normally set in the factory and are used to uniquely
identify the system.)
Keyboard locale setting (for example, English or German) for System ID entry.
Master Boot
Record
Security
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.
✎
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.
✎
For more information about Computer Setup, see the Computer Setup (F10) Utility Guide on the
Documentation CD.
Support for security features may vary depending on the specific computer configuration.
- 1st edition 1
- Service Reference Guide 3
- First Edition (April 2005) 4
- Contents 5
- 1.4 Converting to NTFS 10
- 1.5 HP Software 11
- Setup screen 15
- 2.2.2 Computer Setup Menu 16
- Computer Setup (Continued) 17
- 2.3.1 Backing up the CMOS 20
- 2.4 Diagnostics for Windows 21
- 2.5 Configuration Record 25
- 2.7 Protecting the Software 26
- 2.8 Restoring the Software 26
- Desktop Management 27
- 3.3.3 System Software Manager 29
- 3.4 ROM Flash 30
- 3.4.2 HPQ Flash 31
- 3.4.3 FailSafe Boot Block ROM 31
- 3.4.4 Replicating Your Setup 31
- 3.4.5 Dual-State Power Button 34
- 3.4.6 World Wide Web Site 35
- Security Features Overview 36
- 3.5.1 Password Security 37
- Entering a User Password 38
- Clearing Passwords 39
- 3.5.6 Cable Lock Provision 41
- 3.6.2 Thermal Sensor 41
- Guidelines and Features 43
- 4.1.2 SATA Power Cable 44
- 4.2.1 PATA Data Cable 45
- 4.2.2 PATA Power Cable 45
- 4.2.3 PATA Cable Layout 46
- 4.4 ATA SMART Drives 47
- 4.5 Drive Capacities 47
- 4.6 SATA BIOS 48
- 4.6.2 Native Mode 49
- Disassembly Preparation 51
- 5.2.1 Generating Static 53
- 5.2.4 Grounding the Work Area 54
- 5.3 Operating Guidelines 55
- 5.4 Routine Care 55
- 5.4.3 Cleaning the Keyboard 56
- 5.4.4 Cleaning the Monitor 56
- 5.5 Service Considerations 57
- 5.5.4 Cables and Connectors 58
- 5.5.5 Hard Drives 58
- Microtower (MT) Chassis 61
- 6.2.2 Installing a Padlock 62
- 6.3 Access Panel 63
- 6.4 Front Bezel 64
- 6.5 Front Drive Bezels 65
- 6.5.2 Diskette Drive Bezel 66
- 6.6 Cable Management 67
- 6.6.1 Cable Connections 68
- 6.7 Memory Modules 69
- 6.8 Expansion Cards 70
- 6.8.2 PCI Expansion Card 71
- 6.9 Drives 73
- 6.9.2 Removing a Drive 74
- Releasing the Drives 76
- 6.9.3 Installing a Drive 77
- Connecting Hard Drive Cables 79
- 6.10 Chassis Fan 80
- ❏ power switch/LED cable 81
- ❏ front USB cable 81
- ❏ front audio cable 81
- 6.12 Front I/O Devices 82
- 6.13 Power Switch Assembly 83
- 6.14 Heatsink 85
- 6.15 Processor 86
- 6.16 System Board 87
- 6.17 Battery 89
- 6.17.1 Type 1 Battery Holder 90
- 6.17.2 Type 2 Battery Holder 91
- 6.17.3 Type 3 Battery Holder 92
- 6.18 Speaker 93
- 6.19 Power Supply 94
- 7.2.1 C a bl e Loc k 96
- 7.2.2 Padl oc k 97
- 7.4 Front Bezel 99
- 7.5 Front Drive Bezels 100
- 7.6 Memory Modules 101
- 7.7 PCI Expansion Card 102
- 7.8 Drives 104
- 7.8.2 Cable Management 105
- 7.8.3 Cable Connections 107
- 7.8.4 Optical Drive 108
- ❏ Audio cable 1 110
- ❏ Flat ribbon data cable 2 110
- ❏ Power cable 3 110
- 7.8.6 Primary Hard Drive 113
- 7.9 Front I/O Devices 115
- 7.10 Power Switch Assembly 116
- 7.11 S pe aker 117
- 7.12 C h assi s Fan 118
- 7.13 B a t ter y 119
- 7.13.1 Type 1 Battery Holder 120
- 7.13.2 Type 2 Battery Holder 121
- 7.14 Heatsink Assembly 122
- 7.15 Proc essor 123
- 7.16 Sys tem B oard 124
- 7.17 Power Su p p ly 126
- Connector Pin Assignments 127
- Ethernet RJ-45 128
- Ethernet AUI 128
- Parallel Interface 128
- Microphone 129
- Headphone 129
- Line-In Audio 129
- Line-Out Audio 130
- Ultra SCSI 130
- External Infrared Transceiver 131
- 24-Pin Power 132
- 24-Pin MicroFit Power 133
- 4-Pin Power (for CPU) 133
- PCI Express 134
- Power Cord Set Requirements 137
- Country-Specific Requirements 138
- POST Error Messages 139
- Preliminary Checklist 147
- Solving Minor Problems 148
- Solving Power Supply Problems 151
- Solving Diskette Problems 152
- Solving Hard Drive Problems 154
- Solving Display Problems 157
- Solving Audio Problems 160
- Solving Printer Problems 162
- Solving Keyboard Problems 163
- Solving Network Problems 166
- Solving Memory Problems 168
- Solving Processor Problems 169
- Solving Drive Key Problems 171
- Solving Software Problems 173
- AMD-Based Systems 175
- DIMM Sockets 176
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