HP d248 HP Compaq Business Desktop d200 Series Personal Computers Service Refe - Page 38

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336493-004

Service Reference Guide, d200

Identifying the Chassis, Routine Care, and Disassembly Preparation

5.3.5 Cleaning the Mouse

Before cleaning the mouse, ensure that the power to the computer is turned off.

■

Clean the mouse ball by first removing the retaining plate and the ball from the housing. Pull

out any debris from the ball socket and wipe the ball with a clean, dry cloth before

reassembly.

■

To clean the mouse body, follow the procedures in

Section 5.3.2, “Cleaning the Computer

Case.”

5.4 Service Considerations

Listed below are some of the considerations that you should keep in mind during the disassembly

and assembly of the computer.

5.4.1 Power Supply Fan

The power supply fan is a variable-speed fan based on the temperature in the power supply.

Ä

CAUTION:

The cooling fan is off

only

when the computer is turned off or the power cable has been

disconnected.

The cooling fan is always on when the computer is either in the “On,” “Standby,” or “Suspend” modes.

You must disconnect the power cord from the power source before opening the computer to prevent

system board or component damage.

5.4.2 Tools and Software Requirements

To service the computer, you need the following:

■

Torx T-15 screwdriver (HP screwdriver with bits, PN 161946-001)

■

Torx T-15 screwdriver with small diameter shank (for certain front bezel removal)

■

Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver)

■

Diagnostics software

■

HP tamper-resistant T-15 wrench (Smart Cover FailSafe Key, PN 166527-001) or HP

tamper-resistant bits (Smart Cover FailSafe Key, PN 166527-002)

5.4.3 Screws

The screws used in the computer are not interchangeable. They may have standard or metric

threads and may be of different lengths. If an incorrect screw is used during the reassembly

process, it can damage the unit. HP strongly recommends that all screws removed during

disassembly be kept with the part that was removed, then returned to their proper locations.

✎

Metric screws have a black finish.

U.S. screws have a silver finish.

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	20
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	24
Ultra ATA Drive Guidelines and Features	25
4.1 Ultra ATA Jumpers	25
4.2 Ultra ATA Cables	25
4.2.1 Cable Layout	25
4.3 Drive Installation Guidelines	26
4.3.1 Device Classes	27
4.3.2 Attach Sequence Rules by Class Priority	27
4.3.3 Attach Sequence Worksheet	28
4.3.4 Additional Drive Application Notes	30
4.4 SMART	30
4.5 Drive Capacities	31
Identifying the Chassis, Routine Care, and Disassembly Preparation	33
5.1 Chassis Designations	33
5.1.1 Microtower Type 2	33
5.2 Electrostatic Discharge Information	34
5.2.1 Generating Static	34
5.2.2 Preventing Electrostatic Damage to Equipment	35
5.2.3 Personal Grounding Methods and Equipment	35
5.2.4 Grounding the Work Area	35
5.2.5 Recommended Materials and Equipment	36
5.3 Routine Care	36
5.3.1 General Cleaning Safety Precautions	36
5.3.2 Cleaning the Computer Case	37
5.3.3 Cleaning the Keyboard	37
5.3.4 Cleaning the Monitor	37
5.3.5 Cleaning the Mouse	38
5.4 Service Considerations	38
5.4.1 Power Supply Fan	38
5.4.2 Tools and Software Requirements	38
5.4.3 Screws	38
5.4.4 Cables and Connectors	40
5.4.5 Hard Drives	40
5.4.6 Lithium Coin Cell Battery	40
Removal and Replacement Procedures- Microtower Type 2 Chassis	41
6.1 Preparation for Disassembly	41
6.2 Access Panel	42
6.3 Front Bezel	43
6.4 Front Drive Bezels	44
6.4.1 5.25\	44
6.4.2 Diskette Drive Bezel	45
6.5 Memory Modules	46
6.6 Expansion Card	48
6.7 Drives	49
6.7.1 Drive Positions	49
6.7.2 Removing a 5.25\	50
6.7.3 Removing a Diskette Drive	51
6.7.4 Removing the Lower Drive Cage	52
6.7.5 Removing a 3.5\	53
6.8 Front USB Device	54
6.9 Power Switch Assembly	56
6.10 Speaker	57
6.11 Air Baffle	58
6.12 Chassis Fan	60
6.13 Processor and Heatsink	61
6.14 System Board	62
6.15 Battery	63
6.15.1 Type 1 Battery Holder	64
6.15.2 Type 2 Battery Holder	65
6.16 Power Supply	66
Connector Pin Assignments	67
Power Cord Set Requirements	73
POST Error Messages	75
Troubleshooting Without Diagnostics	79
Memory	105

HP d248 HP Compaq Business Desktop d200 Series Personal Computers Service Refe - Page 38

Cleaning the Mouse, 5.4 Service Considerations, 5.4.1 Power Supply Fan, 5.4.2 Tools

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