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Compaq dx7400 Service Reference Guide - HP Compaq dx7400 Business PC - Page 84

Power Switch Assembly

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Power Switch Assembly 1. Prepare the computer for disassembly (Preparation for Disassembly on page 56). 2. Remove the access panel (Access Panel on page 57). 3. Remove the front bezel (Front Bezel on page 58). 4. Disconnect the braided cables from the system board. 5. Free the braided cables from the cable tie that is attached to the chassis. 6. Press down on the top of the switch holder (1), rotate the switch downward (2), and then pull it away from the chassis while guiding the wires through the hole in the chassis. To install the power switch assembly, reverse the removal procedures. 74 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis

Section	Page
Installing and Customizing the Software	11
Installing the Operating System	11
Installing or Upgrading Device Drivers	12
HP Backup and Recovery Manager	12
Computer Setup (F10) Utility	13
Computer Setup (F10) Utilities	13
Using Computer Setup (F10) Utilities	13
Computer Setup—System Information	15
Computer Setup—Main	16
Computer Setup—Advanced	17
Computer Setup—Boot	19
Computer Setup—PC Health	20
Computer Setup—Exit	20
Recovering the Configuration Settings	21
Backing Up the CMOS	21
Restoring the CMOS	21
HP Insight Diagnostics	22
HP Insight Diagnostics	22
Accessing HP Insight Diagnostics	22
Survey Tab	23
Test Tab	24
Status Tab	24
Log Tab	25
Help Tab	25
Saving and Printing Information in HP Insight Diagnostics	26
Downloading the Latest Version of HP Insight Diagnostics	26
HP Backup and Recovery Manager	27
Desktop Management	28
Desktop Management Overview	28
Initial Configuration and Deployment	29
HP OpenView Agent	29
Altiris Deployment Solution Agent	29
Remote System Installation	30
Remote System Installation	31
Software Updating and Management	31
HP Client Management Interface	31
HP System Software Manager	32
HP Client Manager	33
HP ProtectTools Security Manager	34
HP Client Premium Suite	34
HP Client Foundation Suite	34
HP OpenView Client Configuration Manager	35
HP OpenView PC Configuration Management Solution	35
HP Client Catalog for SMS	35
HP Backup and Recovery Manager	36
Intel vPro-branded PCs with Active Management Technology	37
HP Proactive Change Notification	38
Subscriber’s Choice	38
Retired Solutions	39
ROM Flash	39
Remote ROM Flash	39
HPQFlash	39
Boot Block Emergency Recovery Mode	39
Replicating the Setup	40
Copying to Single Computer	40
Copying to Multiple Computers	41
Creating a Bootable Device	42
Supported USB Flash Media Device	42
Unsupported USB Flash Media Device	43
Dual-State Power Button	45
HP Web Site Support	45
Industry Standards	46
Asset Tracking and Security	46
Password Security	48
Establishing a Setup Password Using Computer Setup	48
Establishing a Power-On Password Using Computer Setup	48
Entering a Power-On Password	49
Entering a Setup Password	49
Changing a Power-On or Setup Password	50
Deleting a Power-On or Setup Password	50
National Keyboard Delimiter Characters	51
Clearing Passwords	51
DriveLock	51
Using DriveLock	51
DriveLock Applications	52
Smart Cover Sensor	52
Setting the Smart Cover Sensor Protection Level	53
Smart Cover Lock	53
Locking the Smart Cover Lock	53
Unlocking the Smart Cover Lock	54
Using the Smart Cover FailSafe Key	54
Cable Lock Provision	54
Fingerprint Identification Technology	54
Fault Notification and Recovery	55
Drive Protection System	55
Surge-Tolerant Power Supply	55
Thermal Sensor	55
Serial ATA (SATA) Drive Guidelines and Features	56
SATA Hard Drives	56
SATA Hard Drive Cables	56
SATA Data Cable	56
SMART ATA Drives	56
Hard Drive Capacities	57
Identifying the Chassis, Routine Care, and Disassembly Preparation	58
Chassis Designations	58
Microtower (MT)	58
Small Form Factor (SFF)	59
Electrostatic Discharge Information	59
Generating Static	59
Preventing Electrostatic Damage to Equipment	60
Personal Grounding Methods and Equipment	60
Grounding the Work Area	61
Recommended Materials and Equipment	61
Operating Guidelines	62
Routine Care	62
General Cleaning Safety Precautions	62
Cleaning the Computer Case	62
Cleaning the Keyboard	63
Cleaning the Monitor	63
Cleaning the Mouse	64
Service Considerations	64
Power Supply Fan	64
Tools and Software Requirements	64
Screws	64
Cables and Connectors	65
Hard Drives	65
Lithium Coin Cell Battery	65
Removal and Replacement Procedures Microtower (MT) Chassis	66
Preparation for Disassembly	66
Access Panel	67
Front Bezel	68
Bezel Blanks	69
5.25-inch Drive Bezel Blank	69
3.5-inch Drive Bezel Blank	70
Memory	71
DDR2-SDRAM DIMMs	71
Installing Memory Modules	71
Expansion Cards	73
Cable Management	75
Cable Connections	76
Drives	77
Drive Positions	77
System Board Drive Connections	78
5.25-inch Drive	79
3.5-inch Drive	80
3.5-inch Hard Drive	81
ReadyBoost Card	82
Front I/O Panel Housing Assembly	83
Power Switch Assembly	84
Speaker	85
Second Serial Port	86
System Fan	87
Heatsink	88
Processor	89
System Board	90
Battery	91
Type 1 Battery Holder	92
Type 2 Battery Holder	92
Type 3 Battery Holder	93
Power Supply	94
Installing a Security Lock	96
Removal and Replacement Procedures Small Form Factor (SFF) Chassis	97
Preparation for Disassembly	97
Access Panel	98
Front Bezel	99
Bezel Blanks	100
5.25-inch Drive Bezel Blank	100
3.5-inch Drive Bezel Blank	100
Cable Management	101
Cable Connections	102
Drives	103
Drive Positions	103
System Board Drive Connections	104
Optical Drive	105
External 3.5-inch Media Card Reader or Diskette Drive	106
Hard Drive	107
Memory	109
DDR2-SDRAM DIMMs	109
Replacing Memory	109
Expansion Card	111
Serial Port	113
ReadyBoost Card	114
Plastic Wire/Cable Fastener and Clips	115
Front I/O Device	116
Power Switch Assembly	117
Speaker	118
Heatsink	119
Heatsink Fan	120
Processor	121
Power Supply	122
System Board	123
Battery	125
Type 1 Battery Holder	126
Type 2 Battery Holder	126
Type 3 Battery Holder	127
Installing a Security Lock	128
Connector Pin Assignments	129
Keyboard	129
Mouse	129
Ethernet BNC	129
Ethernet RJ-45	130
Ethernet AUI	130
Parallel Interface	131
Serial Interface, Powered and Non-Powered	131
USB	132
Diskette Drive Power	132
Microphone	132
Headphone	132
Line-in Audio	132
Line-out Audio	133
External Infrared Transceiver	133
Monitor	133
Diskette Drive Standard Data Cable	134
24-Pin Power	134
24-Pin MicroFit Power	135
4-Pin Power (for CPU)	135
6-Pin Power (for CPU)	135
SATA Data and Power	136
PCI Express	136
PCI Express	137
DVI Connector	138
Power Cord Set Requirements	139
General Requirements	139
Japanese Power Cord Requirements	139
Country-Specific Requirements	140
POST Error Messages	141
POST Numeric Codes and Text Messages	142
Interpreting POST Diagnostic Front Panel LEDs and Audible Codes	148
Troubleshooting Without Diagnostics	152
Safety and Comfort	152
Before You Call for Technical Support	152
Helpful Hints	153
Solving General Problems	155
Solving Power Problems	158
Solving Diskette Problems	159
Solving Hard Drive Problems	162
Solving Media Card Reader Problems	164
Solving Display Problems	166
Solving Audio Problems	169
Solving Printer Problems	171
Solving Keyboard and Mouse Problems	172
Solving Hardware Installation Problems	173
Solving Network Problems	175
Solving Memory Problems	178
Solving Processor Problems	180
Solving CD-ROM and DVD Problems	180
Solving Drive Key Problems	183
Solving Front Panel Component Problems	183
Solving Internet Access Problems	184
Solving Software Problems	186
Contacting Customer Support	187
System Board and Riser Board Reference Designators	188