System Board 1-71.4.3 Connector FunctionsTable 1-2 lists the different connectors on the system board and theirrespective functions.Table 1-2 Connector FunctionsConnector FunctionCN1 COM 1CN2 COM 2CN3, U1, U5 Power connectorsCN4 PS/2 mouse (above) / keyboard (below) connectorsCN5 Standby power connector for 420W standard SPSCN6, CN7 RDM connectorsCN8 Power connector (connects to the system powerbutton on the front panel)CN9 Standby power connector for 200W standard SPS(also used for 420W redundant SPS)CN10 Pin 1 and pin 2 for power LEDCN11 Signal connector for redundant power supplyCN12 NMI signal connectorCN13 Backplane board LED connectorCN14 Printer port (above) / video port (below)CN15 IDE connectorCN16 LAN connectorCN17 Channel 1 narrow SCSI connectorCN18 Diskette drive connectorCN19 Universal serial bus (USB) portsCN20 CPU board connectorCN21 CPU board connectorCN22 Channel 1 wide SCSI connectorCN23 Hard disk LED connectorCN24 SMM connectorCN25 Channel 2 wide SCSI connectorCNN1 Connector for chassis intrusion prevention
