Compaq dx2000 HP Compaq Business Desktop dx2000 Series Personal Computers Serv - Page 20

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Service Reference Guide, dx2000 uT

Desktop Management

3.2.1 FailSafe Boot Block ROM

The FailSafe Boot Block ROM allows for system recovery in the unlikely event of a ROM flash

failure, for example, if a power failure were to occur during a ROM upgrade. The Boot Block is

a flash-protected section of the ROM that checks for a valid system ROM flash when power to

the system is turned on.

■

If the system ROM is valid, the system starts normally.

■

If the system ROM fails the validation check, the FailSafe Boot Block ROM provides

enough support to start the system from a ROMPaq diskette, which will program the system

ROM with a valid image.

To recover the system after it enters Boot Block recovery mode, complete the following steps:

1. If there is a diskette in the diskette drive, remove the diskette and turn off the power.

2. Insert a ROMPaq diskette into the diskette drive.

3. Turn on power to the system.

4. If no ROMPaq diskette is found, you will be prompted to insert one and restart the computer.

5. If the system successfully starts from the diskette and successfully reprograms the ROM,

then the three keyboard lights will turn on.

6. Remove the diskette and turn the power off.

7. Turn the power on again to restart the computer.

3.2.2 Dual-State Power Button

With Advanced Configuration and Power Interface (ACPI) enabled for Windows XP, the power

button can function either as an on/off switch or as a suspend button. The suspend feature does

not completely turn off power, but instead causes the computer to enter a low-power standby.

This allows you to quickly power down without closing applications and to quickly return to the

same operational state without any data loss.

To change the power button’s configuration, complete the following steps:

1. Left click on the

Start Button,

then select

Control Panel > Performance and

Maintenance > Power Options.

2. In the

Power Options Properties,

select the

Advanced

tab.

3. In the

Power Button

section, select the desired power button setting.

After configuring the power button to function as a suspend button, press the power button to put

the system in a very low power state (suspend). Press the button again to quickly bring the

system out of suspend to full power status. To completely turn off all power to the system, press

and hold the power button for four seconds.

Ä

CAUTION:

Do not use the power button to turn off the computer unless the system is not responding;

turning off the power without operating system interaction could cause damage to or loss of data on the

hard drive.

Section	Page
Contents	5
Installing the Operating System	9
1.1 Microsoft Windows XP	9
1.1.1 Installing or Upgrading Device Drivers	9
1.2 Converting to NTFS	10
1.2.1 Windows XP Home and XP Professional	10
1.3 HP Software	10
Setup Utilities and Diagnostics Features	11
2.1 Power-On Self-Test (POST)	11
2.2 Computer Setup Utilities	12
2.2.1 Using Computer Setup (F10) Utilities	12
2.2.2 Computer Setup Menu	14
2.3 Protecting the Software	18
2.4 Restoring the Software	18
Desktop Management	19
3.1 Initial Configuration and Deployment	19
3.2 ROM Flash	19
3.2.1 FailSafe Boot Block ROM	20
3.2.2 Dual-State Power Button	20
3.2.3 Power Management	21
3.2.4 World Wide Web Site	21
3.3 Security	22
3.3.1 Password Security	22
3.3.2 Establishing a Setup Password Using Computer Setup	22
3.3.3 Establishing a Power-On Password Using Computer Setup	22
3.3.4 Surge-Tolerant Power Supply	25
Ultra ATA Drive Guidelines and Features	27
4.1 Ultra ATA Jumpers	27
4.2 Ultra ATA Cables	27
4.2.1 Cable Layout	27
4.3 Drive Installation Guidelines	28
4.3.1 Device Classes	29
4.3.2 Attach Sequence Rules by Class Priority	29
4.3.3 Attach Sequence Worksheet	30
4.3.4 Additional Drive Application Notes	32
4.4 SMART	32
4.5 Drive Capacities	33
Identifying the Chassis, Routine Care, and Disassembly Preparation	35
5.1 Chassis Designations	35
5.1.1 Microtower (µT)	35
5.2 Electrostatic Discharge Information	36
5.2.1 Generating Static	36
5.2.2 Preventing Electrostatic Damage to Equipment	36
5.2.3 Personal Grounding Methods and Equipment	37
5.2.4 Grounding the Work Area	37
5.2.5 Recommended Materials and Equipment	37
5.3 Routine Care	38
5.3.1 General Cleaning Safety Precautions	38
5.3.2 Cleaning the Computer Case	38
5.3.3 Cleaning the Keyboard	39
5.3.4 Cleaning the Monitor	39
5.3.5 Cleaning the Mouse	39
5.4 Service Considerations	40
5.4.1 Power Supply Fan	40
5.4.2 Tools and Software Requirements	40
5.4.3 Screws	40
5.4.4 Cables and Connectors	41
5.4.5 Hard Drives	41
5.4.6 Lithium Coin Cell Battery	41
Removal and Replacement Procedures- Microtower (µT) Chassis	43
6.1 Preparation for Disassembly	43
6.2 Access Panel	44
6.3 Front Bezel	45
6.4 Front Drive Bezels	46
6.4.1 5.25\	46
6.4.2 Diskette Drive Bezel	47
6.5 Memory	48
6.5.1 Installing Memory Modules	48
6.6 Expansion Card	50
6.7 Drives	51
6.7.1 Drive Positions	51
6.7.2 Removing a 5.25\	52
6.7.3 Removing a Diskette Drive	53
6.7.4 Removing the Lower Drive Cage	54
6.7.5 Removing a 3.5\	55
6.8 Front USB Device	56
6.9 Power Switch Assembly	57
6.10 Speaker	58
6.11 System Fan	59
6.12 Processor and Heatsink	60
6.13 System Board	61
6.14 Battery	62
6.15 Power Supply	64
Connector Pin Assignments	65
Power Cord Set Requirements	69
POST Error Messages	71
Troubleshooting Without Diagnostics	75
Memory	101

Compaq dx2000 HP Compaq Business Desktop dx2000 Series Personal Computers Serv - Page 20

FailSafe Boot Block ROM, 3.2.2 Dual-State Power Button, Start Button

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