HP dx7400 - Microtower PC Service & Reference Manual page 9

System Board ................................................................................................................................... 113
Battery .............................................................................................................................................. 115
Type 1 Battery Holder ...................................................................................................... 116
Type 2 Battery Holder ...................................................................................................... 116
Type 3 Battery Holder ...................................................................................................... 117
Installing a Security Lock .................................................................................................................. 118
Appendix A Connector Pin Assignments
Keyboard .......................................................................................................................................... 119
Mouse ............................................................................................................................................... 119
Ethernet BNC ................................................................................................................................... 119
Ethernet RJ-45 ................................................................................................................................. 120
Ethernet AUI ..................................................................................................................................... 120
Parallel Interface .............................................................................................................................. 121
Serial Interface, Powered and Non-Powered ................................................................................... 121
USB .................................................................................................................................................. 122
Diskette Drive Power ........................................................................................................................ 122
Microphone ....................................................................................................................................... 122
Headphone ....................................................................................................................................... 122
Line-in Audio .................................................................................................................................... 122
Line-out Audio .................................................................................................................................. 123
External Infrared Transceiver ........................................................................................................... 123
Monitor ............................................................................................................................................. 123
Diskette Drive Standard Data Cable ................................................................................................ 124
24-Pin Power .................................................................................................................................... 124
24-Pin MicroFit Power ...................................................................................................................... 125
4-Pin Power (for CPU) ...................................................................................................................... 125
6-Pin Power (for CPU) ...................................................................................................................... 125
SATA Data and Power ..................................................................................................................... 126
PCI Express .................................................................................................................................... 126
PCI Express .................................................................................................................................... 127
DVI Connector .................................................................................................................................. 128
Appendix B Power Cord Set Requirements
General Requirements ..................................................................................................................... 129
Japanese Power Cord Requirements .............................................................................................. 129
Country-Specific Requirements ........................................................................................................ 130
Appendix C POST Error Messages
POST Numeric Codes and Text Messages ..................................................................................... 132
Interpreting POST Diagnostic Front Panel LEDs and Audible Codes .............................................. 138
Appendix D Troubleshooting Without Diagnostics
Safety and Comfort .......................................................................................................................... 142
Before You Call for Technical Support ............................................................................................. 142
Helpful Hints ..................................................................................................................................... 143
Solving General Problems ................................................................................................................ 145
Solving Power Problems .................................................................................................................. 148
Solving Diskette Problems ............................................................................................................... 149
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