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support.dell.com Installing Upgrades on the System Board 2-7
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Table 2-1. System Board Connectors and Sockets
Connector or
Socket Description
BT1 Battery socket
CN1 Keyboard and mouse connectors
CN2 DC main power input connector
CN3 Parallel port connector (sometimes referred to as LPT1), video
connector, and serial port connector
CN4 Front audio/USB board audio signal cable connector
CN5 USB port connector, headphone connector, and microphone
connector
CN6 USB port connector
CN7 Secondary IDE interface connector for optical drive
CN8 Primary IDE interface connector
CN12 Front audio/USB board interface connector
CN13 Audio signal cable connector
CN16 Diskette-drive interface connector
DIMMn DIMM socket
FN1 Processor fan connector
JP1 Power button connector
JP2 Power-button indicator connector
JP3 Hard-disk drive activity indicator connector
JP6 Password jumper
JP7 Boot-block select jumper
JPX1 Processor mode jumper
JPX2 NVRAM jumper
LED1 System board power indicator
PH1 Line-out connector
SL1 Riser-board connector
U9 Microprocessor socket
NOTE: The Glossary in the system Help defines abbreviations and acronyms.