HP Pro 4300 Maintenance & Service Guide HP Compaq Pro 4300 All-in-One Busi - Page 7

Troubleshooting Without Diagnostics, POST Error Messages, Password Security and Resetting CMOS - memory

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WLAN Module ...64 Speakers ...66 Stand bracket ...68 System Board ...70 Hard Drive and Optical Drive Cables and Connectors 73 Display Cable ...75 Front Bezel ...77 Display Panel ...78 Power Switch Assembly ...82 7 Troubleshooting Without Diagnostics ...84 Safety and Comfort ...84 Solving General Problems ...85 Solving Power Problems ...88 Solving Hard Drive Problems ...88 Solving Media Card Reader Problems 92 Solving Display Problems ...93 Solving Audio Problems ...96 Solving Printer Problems ...98 Solving Keyboard and Mouse Problems 99 Solving Hardware Installation Problems 101 Solving Network Problems ...102 Solving Memory Problems ...105 Solving Processor Problems ...106 Solving CD-ROM and DVD Problems 107 Solving USB Flash Drive Problems 109 Solving Internet Access Problems ...110 Solving Software Problems ...112 8 POST Error Messages ...113 POST Numeric Codes and Text Messages 114 Interpreting POST Diagnostic Front Panel LEDs 115 9 Password Security and Resetting CMOS 116 Establishing a Setup or Power-on Password 117 Resetting the Setup and Power-on Password 118 Resetting CMOS ...119 Appendix A Power Cord Set Requirements 120 General Requirements ...120 vii

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WLAN Module
....................................................................................................................................
64
Speakers
............................................................................................................................................
66
Stand bracket
.....................................................................................................................................
68
System Board
.....................................................................................................................................
70
Hard Drive and Optical Drive Cables and Connectors
.......................................................................
73
Display Cable
.....................................................................................................................................
75
Front Bezel
.........................................................................................................................................
77
Display Panel
.....................................................................................................................................
78
Power Switch Assembly
.....................................................................................................................
82
7
Troubleshooting Without Diagnostics
........................................................................................................
84
Safety and Comfort
............................................................................................................................
84
Solving General Problems
..................................................................................................................
85
Solving Power Problems
....................................................................................................................
88
Solving Hard Drive Problems
.............................................................................................................
88
Solving Media Card Reader Problems
...............................................................................................
92
Solving Display Problems
...................................................................................................................
93
Solving Audio Problems
.....................................................................................................................
96
Solving Printer Problems
....................................................................................................................
98
Solving Keyboard and Mouse Problems
............................................................................................
99
Solving Hardware Installation Problems
...........................................................................................
101
Solving Network Problems
...............................................................................................................
102
Solving Memory Problems
...............................................................................................................
105
Solving Processor Problems
............................................................................................................
106
Solving CD-ROM and DVD Problems
..............................................................................................
107
Solving USB Flash Drive Problems
..................................................................................................
109
Solving Internet Access Problems
....................................................................................................
110
Solving Software Problems
..............................................................................................................
112
8
POST Error Messages
................................................................................................................................
113
POST Numeric Codes and Text Messages
.....................................................................................
114
Interpreting POST Diagnostic Front Panel LEDs
.............................................................................
115
9
Password Security and Resetting CMOS
.................................................................................................
116
Establishing a Setup or Power-on Password
...................................................................................
117
Resetting the Setup and Power-on Password
..................................................................................
118
Resetting CMOS
..............................................................................................................................
119
Appendix A
Power Cord Set Requirements
................................................................................................
120
General Requirements
.....................................................................................................................
120
vii