Dell OptiPlex GX110, Service Manual

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System Board Jumpers
Figure 15 shows the location of the jumpers on the system board. Table 1 lists the system board jumpers and their settings.
Figure 15. System Board Jumpers
Jumper pins are small groups of two or more pins on a circuit board. Plastic jumpers containing a wire fit down over the pins. The wire connects
the pins and creates a circuit.
NOTICE: Make sure that 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 jumper off its pin(s) and carefully fit it down onto the pin(s) indicated.
Dell shipped your computer with a PSWD jumper installed, meaning that the password features for this computer are enabled. When you remove
the jumper, or when you install the jumper on only one of the two pins, the password features are disabled.
System Board Labels
Table 1 lists the labels for connectors and sockets on your system board, and it gives a brief description of their functions.
Table 1. System Board Connectors and Sockets
Expansion Cards
The system accommodates up to six expansion cards, including up to five 32-bit PCI expansion cards and one 32-bit AGP card. (See Figure 16
for examples of these cards.)
Connector or Socket Description
AUX_LED Auxiliary power indicator
B1 Battery socket
DIMM_ x DIMM socket
DSKT Diskette/tape drive interface connector
ENET Integrated NIC connector
FAN Microprocessor fan connector
IDE n
EIDE interface 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 USB connectors
NOTE: Before disconnecting a peripheral from the system or removing a component from the system board, verify that the standby
power LED on the system board is off. For the location of this LED, see
Figures 19 and 20 .