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HP Nc4000 Maintenance and Service Guide: HP Compaq Notebook nc4000 Series - Page 115

Switch Board, Spare Part Number Information

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Removal and Replacement Procedures 5.18 Switch Board Switch board Switch Board Spare Part Number Information 325515-001 1. Prepare the notebook for disassembly (Section 5.3) and remove the following components: ❏ LED switch cover (Section 5.7) ❏ Keyboard (Section 5.8) ❏ Display assembly (Section 5.12) ❏ Top cover (Section 5.13) 2. Remove the two PM2.0×3.0 screws 1 that secure the switch board to the system board. 3. Lift up on the middle of the switch board 2 to disconnect it from the system board. 4. Remove the switch board. Removing the Switch Board Reverse the above procedure to install the switch board. 5-42 Maintenance and Service Guide

Section	Page
Contents	3
Product Description	6
1.1 Models	7
1.2 Features	11
1.3 Clearing a Password	13
1.4 Power Management	14
1.5 External Components	15
1.6 Design Overview	24
Troubleshooting	25
2.1 Computer Setup and Diagnostics Utilities	25
Using Computer Setup	26
Selecting from the File Menu	27
Selecting from the Security Menu	28
Selecting from the Advanced Menu	29
2.2 Using Diagnostics for Windows	31
Obtaining, Saving, or Printing Configuration Information	31
Obtaining, Saving, or Printing Diagnostic Test Information	32
2.3 Troubleshooting Flowcharts	34
Flowchart 2.1—Initial Troubleshooting	35
Flowchart 2.2—No Power, Part 1	36
Flowchart 2.3—No Power, Part 2	37
Flowchart 2.4—No Power, Part 3	38
Flowchart 2.5—No Power, Part 4	39
Flowchart 2.6—No Video, Part 1	40
Flowchart 2.7—No Video, Part 2	41
Flowchart 2.8—Nonfunctioning Docking Station (if applicable)	42
Flowchart 2.9—No Operating System (OS) Loading	43
Flowchart 2.10—No OS Loading, Hard Drive, Part 1	44
Flowchart 2.11—No OS Loading, Hard Drive, Part 2	45
Flowchart 2.12—No OS Loading, Hard Drive, Part 3	46
Flowchart 2.13—No OS Loading, Diskette Drive	47
Flowchart 2.14—No OS Loading, CD- or DVD-ROM Drive	48
Flowchart 2.15—No Audio, Part 1	49
Flowchart 2.16—No Audio, Part 2	50
Flowchart 2.17—Nonfunctioning Device	51
Flowchart 2.18—Nonfunctioning Keyboard	52
Flowchart 2.19—Nonfunctioning Pointing Device	53
Flowchart 2.20—No Network/Modem Connection	54
Illustrated Parts Catalog	55
3.1 Serial Number Location	55
3.2 Notebook Major Components	56
3.3 Miscellaneous Plastics Kit Components	62
3.4 Port Replicators and Mass Storage Devices	64
3.5 Miscellaneous	65
Removal and Replacement Preliminaries	67
4.1 Tools Required	67
4.2 Service Considerations	68
Plastic Parts	68
Cables and Connectors	68
4.3 Preventing Damage to Removable Drives	69
4.4 Preventing Electrostatic Damage	70
4.5 Packaging and Transporting Precautions	70
4.6 Workstation Precautions	71
4.7 Grounding Equipment and Methods	72
Removal and Replacement Procedures	74
5.1 Serial Number	75
5.2 Disassembly Sequence Chart	75
5.3 Preparing the Notebook for Disassembly	77
5.4 Notebook Feet	81
5.5 Memory Expansion Board	82
5.6 Mini PCI Communications Board	83
5.7 LED Switch Cover	86
5.8 Keyboard	88
5.9 Fan	93
5.10 Heat Sink	95
5.11 Processor	99
5.12 Display Assembly	101
5.13 Top Cover	105
5.14 Bluetooth Wireless Device	109
5.15 TouchPad	110
5.16 RTC Battery	113
5.17 Speaker/Microphone	114
5.18 Switch Board	115
5.19 System Board	116
5.20 Modem Board	119
Specifications	121
Connector Pin Assignments	133
Power Cord Set Requirements	137
3-Conductor Power Cord Set	137
General Requirements	137
Country-Specific Requirements	138
Screw Listing	140