Dell Precision 420 - Manual (Page 68)

Table 1. System Board Jumpers Settings
System Board Labels
Table 2 lists the labels for connectors and sockets on your system board and control panel and gives a brief description of their functions.
Table 2. System Board and Control Panel Connectors and Sockets
Jumper Setting Description
RTCRST Real-time clock and CMOS reset. Install a jumper plug on these pins for approximately 1 second to reset the
contents of the real-time clock and the CMOS. Do not leave the jumper plug installed.
PSWD Password features enabled.
Password features disabled.
NOTE: For the full name of an abbreviation or acronym used in this table, see the Glossary .
Connector or Socket Description
AUX_LED Hard-disk drive access indicator connector
BATTERY Battery socket
CD-IN, AUX Analog audio input connector
RIMMA_2, RIMMA_4 Memory RIMM sockets on channel A
RIMMB_1, RIMMB_3 Memory RIMM sockets on channel B
FAN_SYS System fan connector
FAN_CCAG Expansion card cage area fan connector
FLOPPY Floppy disk connector (34-pin)
HD_TEMP Hard-disk drive temperature sensor connector (on control panel)
IDEn EIDE interface connector
INTRUSION Chassis intrusion switch connector (on control panel)
KEYBOARD PS/2 keyboard connector
LINE-IN Line-in jack
LINE-OUT Line-out jack
M_PWR1 Desktop chassis power connector 1
M_PWR2 Desktop chassis power connector 2
MT_PWR1 Mini tower chassis power connector 1
MT_PWR2 Mini tower chassis power connector 2
MIC-IN Microphone jack