HP dx2420 - Microtower PC Service & Reference Manual page 5

Expansion Cards ................................................................................................................................ 40
Drives ................................................................................................................................................. 44
System Board Drive Connections ...................................................................................... 46
Drive Positions ................................................................................................................... 47
Removing an Optical Drive ................................................................................................ 48
Installing an Optical Drive into the 5.25-inch Drive Bay ..................................................... 49
Removing an External 3.5-inch Drive ................................................................................ 50
Installing a Drive into the 3.5-inch External Drive Bay ....................................................... 51
Removing an Internal 3.5-inch Hard Drive ......................................................................... 53
Installing an Internal 3.5-inch Hard Drive ........................................................................... 55
Front USB Panel ................................................................................................................................ 58
Power Switch/LED Assembly ............................................................................................................. 59
Heat sink ............................................................................................................................................ 60
Processor ........................................................................................................................................... 61
Rear Chassis Fan ............................................................................................................................... 62
Power Supply ..................................................................................................................................... 63
System Board ..................................................................................................................................... 64
Battery ................................................................................................................................................ 65
Type 1 Battery Holder ........................................................................................................ 66
Type 2 Battery Holder ........................................................................................................ 66
Type 3 Battery Holder ........................................................................................................ 67
Appendix A Connector Pin Assignments
Keyboard ............................................................................................................................................ 68
Mouse ................................................................................................................................................. 68
Ethernet RJ-45 ................................................................................................................................... 69
Parallel Interface ................................................................................................................................ 69
Serial Interface, Powered and Non-Powered ..................................................................................... 70
USB .................................................................................................................................................... 70
Microphone ......................................................................................................................................... 70
Headphone ......................................................................................................................................... 70
Line-in Audio ...................................................................................................................................... 71
Line-out Audio .................................................................................................................................... 71
Monitor ............................................................................................................................................... 71
24-Pin Power ...................................................................................................................................... 72
4-Pin Power (for CPU) ........................................................................................................................ 72
SATA Data and Power ....................................................................................................................... 72
PCI Express ...................................................................................................................................... 73
PCI Express ....................................................................................................................................... 74
PCI Express Mini Card ....................................................................................................................... 75
Appendix B Power Cord Set Requirements
General Requirements ....................................................................................................................... 76
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