Dell OptiPlex GX100 - Manual (Page 51)

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.
To change a jumper setting, pull the plug off its pin(s) and carefully fit it down onto the pin(s) indicated.
NOTICE: Make sure your system is turned off and unplugged before you change a jumper setting. Otherwise, damage to your
system or unpredictable results may occur.
Table 1. System-Board Jumper Settings
System Board Labels
Table 2 lists the labels for light-emitting diode (LED) indicators, connectors, and sockets on the system board, and it gives a brief description of
their functions.
Table 2. System Board Indicators, Connectors, and Sockets
Rotating the Power Supply Away From the System Board (Mini Tower Chassis Only)
To access some components on the system board, you may have to rotate the mini tower chassis system power supply out of the way. To rotate
the power supply, perform the following steps.
1. Remove the computer cover as instructed in " Removing and Replacing the Computer Cover ."
Jumper Setting Description
PSWD (default) System password features are enabled.
System password features are disabled.
jumpered unjumpered
Connector or Socket Description
AUX_LED Auxiliary power indicator
B1 Battery socket
DIMM_x Dual in-line memory module (DIMM) socket
DSKT Diskette/tape drive interface connector
ENET Integrated network interface controller (NIC) connector
FAN Microprocessor fan connector
IDEn EIDE interface connector
INTRUSION Chassis intrusion switch connector
KYBD Keyboard connector
MICROPROCESSOR Microprocessor connector
MONITOR Video connector
MOUSE Mouse connector
PANEL Control panel connector
PARALLEL Parallel port connector; sometimes referred to as LPT1
POWER_1 Main power input connector
POWER_2 3.3-volt (V) power input connector
RISER Riser board connector
SERIALn Serial port connectors
USB Universal Serial Bus (USB) connectors
CAUTION: Before you remove the computer cover, see " Safety First —For You and Your Computer ."