HP Pro 3420 PC Maintenance & Service Guide - Page 7

Appendix A, Troubleshooting Without Diagnostics, POST Error Messages, Connector Pin Assignments

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Hard Drive Cables and Connector ...64 Speakers ...66 System Board ...68 Front Bezel ...69 Display Panel ...70 Appendix A Troubleshooting Without Diagnostics 74 Safety and Comfort ...74 Before You Call for Technical Support 74 Helpful Hints ...75 Solving General Problems ...77 Solving Power Problems ...80 Solving Diskette Problems ...81 Solving Hard Drive Problems ...84 Solving Media Card Reader Problems 87 Solving Display Problems ...89 Solving Audio Problems ...93 Solving Printer Problems ...95 Solving Keyboard and Mouse Problems 96 Solving Hardware Installation Problems 98 Solving Network Problems ...99 Solving Memory Problems ...103 Solving Processor Problems ...104 Solving CD-ROM and DVD Problems 105 Solving USB Flash Drive Problems 107 Solving Front Panel Component Problems 108 Solving Internet Access Problems ...108 Solving Software Problems ...111 Contacting Customer Support ...112 Appendix B POST Error Messages ...113 POST Numeric Codes and Text Messages 114 Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 121 Appendix C Connector Pin Assignments ...124 Ethernet BNC ...124 USB ...124 Microphone ...124 Headphone ...125 Line-in Audio ...125 vii

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Hard Drive Cables and Connector
.....................................................................................................
64
Speakers
............................................................................................................................................
66
System Board
.....................................................................................................................................
68
Front Bezel
.........................................................................................................................................
69
Display Panel
.....................................................................................................................................
70
Appendix A
Troubleshooting Without Diagnostics
......................................................................................
74
Safety and Comfort
............................................................................................................................
74
Before You Call for Technical Support
...............................................................................................
74
Helpful Hints
.......................................................................................................................................
75
Solving General Problems
..................................................................................................................
77
Solving Power Problems
....................................................................................................................
80
Solving Diskette Problems
.................................................................................................................
81
Solving Hard Drive Problems
.............................................................................................................
84
Solving Media Card Reader Problems
...............................................................................................
87
Solving Display Problems
...................................................................................................................
89
Solving Audio Problems
.....................................................................................................................
93
Solving Printer Problems
....................................................................................................................
95
Solving Keyboard and Mouse Problems
............................................................................................
96
Solving Hardware Installation Problems
.............................................................................................
98
Solving Network Problems
.................................................................................................................
99
Solving Memory Problems
...............................................................................................................
103
Solving Processor Problems
............................................................................................................
104
Solving CD-ROM and DVD Problems
..............................................................................................
105
Solving USB Flash Drive Problems
..................................................................................................
107
Solving Front Panel Component Problems
......................................................................................
108
Solving Internet Access Problems
....................................................................................................
108
Solving Software Problems
..............................................................................................................
111
Contacting Customer Support
..........................................................................................................
112
Appendix B
POST Error Messages
..............................................................................................................
113
POST Numeric Codes and Text Messages
.....................................................................................
114
Interpreting POST Diagnostic Front Panel LEDs and Audible Codes
..............................................
121
Appendix C
Connector Pin Assignments
....................................................................................................
124
Ethernet BNC
...................................................................................................................................
124
USB
..................................................................................................................................................
124
Microphone
.......................................................................................................................................
124
Headphone
.......................................................................................................................................
125
Line-in Audio
....................................................................................................................................
125
vii