Dell Precision 420 - Manual (Page 43)

System Board Jumpers
Figure 29 shows the location of the jumpers on the system board. Table 1 lists the system board jumpers and their settings.
Figure 29. System Board Jumpers
Jumpers are small blocks on a circuit board with two or more pins emerging from them. Plastic plugs containing a wire fit down over the pins. The
wire connects the pins and creates a circuit.
NOTICE: Make sure your system is turned off before you change a jumper setting. Otherwise, damage to your system or
unpredictable results may occur.
To change a jumper setting, pull the plug off its pin(s) and carefully fit it down onto the pin(s) indicated.
Table 1. System Board Jumper Settings
System Board Labels
Table 2 lists the labels for connectors and sockets on your system board, and it gives a brief description of their functions.
Table 2. System Board Connector and Socket Labels
33 Microphone connector
34 Mouse/keyboard (stacked)
35 System fan power connector
36 Serial port 1/ serial port 2 (stacked)
37 Parallel port/external SCSI port (stacked)
Jumper Setting Description
PSWD (default) Password features are enabled.
Password features are disabled.
RTCRST Real-time clock reset. Can be used for troubleshooting purposes.
jumpered unjumpered
Connector or Socket Label Description
AGP Accelerated graphics port card socket
BATTERY Battery socket
CD_IN CD-ROM audio interface connector
DISKETTE Diskette/tape drive interface connector
ENET Integrated NIC connector