HP dx7400 - Microtower PC Service & Reference Manual page 190

JP49/E49
L1
L2
L3
L4
L5
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P15
P16
P17
P18
P19
P20
P21
P22
P23
P24
P25
P26
P27
P29
P30
180 Appendix E System Board and Riser Board Reference Designators
Clear password header/jumper
USB front port choke (1st)
USB rear port choke (1st)
USB rear port choke (2nd)
USB rear port choke (3rd)
USB front port choke (2nd)
P/S connector (20 or 24 pin)
Second P/S connector (as required)
Processor 12V header
Secondary Processor 12V header
Main Power/HDD LED connector
Speaker connector
Analog audio connector (from CD-ROM)
Primary chassis fan header or primary CPU heatsink fan
Secondary chassis fan header
Diskette drive connector
Auxiliary Audio connector
Alert on LAN connector
VRM module footprint
AUI connector
Fan command/fan sink header (may be 2 or 4 pin)
Digital audio expansion header
SPDIF internal input header
SPDIF internal output header
Primary IDE connector
Secondary IDE/MultiBay connector
Header for NEWCARD
Header for front panel audio
Header for front panel USB
Internal USB connector 1
Internal USB connector 2
MultiBay header
SCSI LED connector
PCI extender slot (female)